Added RTC module

Readme.md

@@ -1,11 +1,25 @@
 # ESP Wordclock
 ## Setup
-Generate a wlancfg.lua for your wifi based on the given example wlancfg.lua.example
 
-Copy the required files to the microcontroller:
+Install the firmware on the ESP:
+The ESP must be set into the bootloader mode, like [this](https://www.ccc-mannheim.de/wiki/ESP8266#Boot_Modi)
+
+The firmware can be downloaded with the following script:
 <pre>
- sudo ./programESP.sh serial wlancfg.lua.lua wlancfg.lua
+cd os/
- sudo ./programESP.sh serial init.lua init.lua
+./flash.sh ttyUSB0
+</pre>
+
+Reboot the ESP, with a serial terminal,
+format the filesystem with the following command and reboot it:
+<pre>
+file.format()
+node.reboot()
+</pre>
+
+Then disconnect the serial terminal and copy the required files to the microcontroller:
+<pre>
+./tools/initialFlash.sh /dev/ttyUSB0
 </pre>
 
 ## Internal Setup

displayword.lua

@@ -0,0 +1,222 @@
+-- Module filling a buffer, sent to the LEDs
+
+function updateColor(data)
+    if (data.usedCharacters <= data.charsPerMinute) then 
+        if (data.words.min1 == 1 or data.words.min2 == 1 or data.words.min3 == 1 or data.words.min4 == 1) then
+            return data.colorMin1
+        else
+            return data.colorFg
+        end
+    elseif (data.usedCharacters <= data.charsPerMinute*2) then 
+        if (data.words.min2 == 1 or data.words.min3 == 1 or data.words.min4 == 1) then
+            return data.colorMin2
+        else
+            return data.colorFg
+        end
+    elseif (data.usedCharacters <= data.charsPerMinute*3) then 
+        if (data.words.min3 == 1 or data.words.min4 == 1) then
+            return data.colorMin3
+        else
+            return data.colorFg
+        end
+    elseif (data.usedCharacters > data.charsPerMinute*3) then 
+        if (data.words.min4 == 1) then
+            return data.colorMin4
+        else
+            return data.colorFg
+        end
+    else
+        return data.colorFg
+    end
+end
+
+function drawLEDs(data, numberNewChars)
+    local tmpBuf=nil
+    for i=1,numberNewChars do
+        if (tmpBuf == nil) then
+            tmpBuf = updateColor(data)
+        else
+            tmpBuf=tmpBuf .. updateColor(data)
+        end
+        data.usedCharacters=data.usedCharacters+1
+        
+    end
+    return tmpBuf
+end
+
+-- Module displaying of the words
+function generateLEDs(words, colorFg, colorMin1, colorMin2, colorMin3, colorMin4, characters)
+ -- Set the local variables needed for the colored progress bar
+ data={}
+ data.charsPerMinute=math.floor(characters/3) -- devide by three (Minute 1 to Minute 3, Minute 4 takes the last chars)
+ data.words=words
+ data.colorFg=colorFg
+ data.colorMin1=colorMin1
+ data.colorMin2=colorMin2
+ data.colorMin3=colorMin3
+ data.colorMin4=colorMin4
+ data.usedCharacters=0
+ local space=string.char(0,0,0)
+ -- update the background color, if set
+ if (colorBg ~= nil) then
+   space = colorBg
+ end
+
+ -- Set the foreground color as the default color
+ local buf=colorFg
+
+ -- line 1----------------------------------------------
+ if (words.itis == 1) then
+    buf=drawLEDs(data,2) -- ES
+    print(tostring(buf))
+    -- K fill character
+    buf=buf .. space:rep(1)
+    buf=buf .. drawLEDs(data,3) -- IST
+    -- L fill character
+    buf=buf .. space:rep(1)
+ else
+    buf=space:rep(7)
+ end
+ if (words.fiveMin== 1) then
+    buf= buf .. drawLEDs(data,4) -- FUENF
+  else
+    buf= buf .. space:rep(4)
+ end
+ -- line 2-- even row (so inverted) --------------------
+ if (words.twenty == 1) then
+    buf= buf .. drawLEDs(data,7) -- ZWANZIG
+  else
+    buf= buf .. space:rep(7)
+ end
+ if (words.tenMin == 1) then
+    buf= buf .. drawLEDs(data,4) -- ZEHN
+  else
+    buf= buf .. space:rep(4)
+ end
+ -- line3----------------------------------------------
+ if (words.threequater == 1) then
+    buf= buf .. drawLEDs(data,11) -- Dreiviertel
+  elseif (words.quater == 1) then
+    buf= buf .. space:rep(4)
+    buf= buf .. drawLEDs(data,7) -- VIERTEL
+ else
+    buf= buf .. space:rep(11)
+ end
+ --line 4-------- even row (so inverted) -------------
+ if (words.before == 1) then
+    buf=buf .. space:rep(2) 
+    buf= buf .. drawLEDs(data,3) -- VOR
+  else
+    buf= buf .. space:rep(5)
+ end
+ if (words.after == 1) then
+    buf= buf .. drawLEDs(data,4) -- NACH
+    buf= buf .. space:rep(2) -- TG
+  else
+    buf= buf .. space:rep(6)
+ end
+ ------------------------------------------------
+ if (words.half == 1) then
+    buf= buf .. drawLEDs(data,4) -- HALB
+    buf= buf .. space:rep(1) -- X
+  else
+    buf= buf .. space:rep(5)
+ end
+ if (words.twelve == 1) then
+    buf= buf .. drawLEDs(data,5) -- ZWOELF
+    buf= buf .. space:rep(1) -- P
+  else
+    buf= buf .. space:rep(6)
+ end
+ ------------even row (so inverted) ---------------------
+ if (words.seven == 1) then
+    buf= buf .. drawLEDs(data,6) -- SIEBEN
+    buf= buf .. space:rep(5)
+ elseif (words.oneLong == 1) then
+    buf= buf .. space:rep(5)
+    buf= buf .. drawLEDs(data,4) -- EINS
+    buf= buf .. space:rep(2)
+ elseif (words.one == 1) then
+    buf= buf .. space:rep(6)
+    buf= buf .. drawLEDs(data,3) -- EIN
+    buf= buf .. space:rep(2)
+ elseif (words.two == 1) then
+    buf= buf .. space:rep(7)
+    buf= buf .. drawLEDs(data,4) -- ZWEI
+ else
+    buf= buf .. space:rep(11)
+ end
+ ------------------------------------------------
+ if (words.three == 1) then
+    buf= buf .. space:rep(1)
+    buf= buf .. drawLEDs(data,4) -- DREI
+    buf= buf .. space:rep(6)
+  elseif (words.five == 1) then
+    buf= buf .. space:rep(7)
+    buf= buf .. drawLEDs(data,4) -- FUENF
+ else
+    buf= buf .. space:rep(11)
+ end
+ ------------even row (so inverted) ---------------------
+ if (words.four == 1) then
+    buf= buf .. drawLEDs(data,4) -- VIER
+    buf= buf .. space:rep(7)
+  elseif (words.nine == 1) then
+    buf= buf .. space:rep(4)
+    buf= buf .. drawLEDs(data,4) -- NEUN
+    buf= buf .. space:rep(3)
+ elseif (words.eleven == 1) then
+    buf= buf .. space:rep(8)
+    buf= buf .. drawLEDs(data,3) -- ELEVEN
+ else
+    buf= buf .. space:rep(11)
+ end
+ ------------------------------------------------
+ if (words.eight == 1) then
+    buf= buf .. space:rep(1)
+    buf= buf .. drawLEDs(data,4) -- ACHT
+    buf= buf .. space:rep(6)
+  elseif (words.ten == 1) then
+    buf= buf .. space:rep(5)
+    buf= buf .. drawLEDs(data,4) -- ZEHN
+    buf= buf .. space:rep(2)
+ else
+    buf= buf .. space:rep(11)
+ end
+ ------------even row (so inverted) ---------------------
+ if (words.clock == 1) then
+    buf= buf .. drawLEDs(data,3) -- UHR
+  else
+    buf= buf .. space:rep(3)
+ end
+ if (words.six == 1) then
+    buf= buf .. space:rep(2)
+    buf= buf .. drawLEDs(data,5) -- SECHS
+    buf= buf .. space:rep(1)
+  else
+    buf= buf .. space:rep(8)
+ end
+ 
+ if (words.min1 == 1) then
+    buf= buf .. colorFg
+  else
+    buf= buf .. space:rep(1)
+ end
+ if (words.min2 == 1) then
+    buf= buf .. colorFg
+  else
+    buf= buf .. space:rep(1)
+  end
+ if (words.min3 == 1) then
+    buf= buf .. colorFg
+  else
+    buf= buf .. space:rep(1)
+  end
+ if (words.min4 == 1) then
+    buf= buf .. colorFg
+  else
+    buf= buf .. space:rep(1)
+  end
+  collectgarbage()
+  return buf
+end

index.html

@@ -0,0 +1,22 @@
+<html>
+<head><title>WordClock Setup Page</title>
+</head><body>
+<h1>Welcome to the WordClock</h1>
+<form action="" method="POST">
+<table>
+<tr><th>WIFI-SSID</b></th><td><input name="ssid" value="${SSID}"></td><td /></tr>
+<tr><th>WIFI-Password</th><td><input name="password"></td><td /></tr>
+<tr><th>SNTP Server</th><td><input name="sntpserver" value="${sntpserverhostname}" ></td><td>ntp server to sync the time</tr>
+<tr><th>Offset to UTC time</th><td><input type="number" name="timezoneoffset" value="${TIMEZONEOFFSET}"></td><td>Define the offset to UTC time in hours. E.g +1</tr>
+<tr><th>Color</th><td><input type="color" name="fcolor" value="${HEXCOLOR}"></td><td /></tr>
+<tr><th>1. Minute Color</th><td><input type=\"color\" name=\"colorMin1\" value=\"" .. hexColor1 .. "\"></td><td /></tr>"
+<tr><th>2. Minute Color</th><td><input type=\"color\" name=\"colorMin2\" value=\"" .. hexColor2 .. "\"></td><td /></tr>"
+<tr><th>3. Minute Color</th><td><input type=\"color\" name=\"colorMin3\" value=\"" .. hexColor3 .. "\"></td><td /></tr>"
+<tr><th>4. Minute Color</th><td><input type=\"color\" name=\"colorMin4\" value=\"" .. hexColor4 .. "\"></td><td /></tr>"
+<tr><th>Three quater</th><td><input type="checkbox" name="threequater" ${THREEQUARTERCHECKED}></td><td>Dreiviertel Joa/nei</td></tr>
+<tr><th>ColorMode</th><td><input type="checkbox" name="colorMode" ${COLORMODECHECKED}></td><td>If checked, words are dark, rest is colored</td></tr>
+<tr><td colspan="3"><div align="center"><input type="submit" value="Save Configuration" onclick="this.value='Submitting ..';this.disabled='disabled'; this.form.submit();"></div></td></tr>
+<tr><td colspan="3"><div align="center"><input type="submit" name="action" value="Reboot"></div></td></tr>
+</table></form>
+$ADDITIONAL_LINE
+</body></html>

init.lua

@@ -0,0 +1,56 @@
+uart.setup(0, 115200, 8, 0, 1, 1 )
+print("Autostart in 5 seconds...")
+
+ws2812.init() -- WS2812 LEDs initialized on GPIO2
+MAXLEDS=110
+counter1=0
+ws2812.write(string.char(0,0,0):rep(114))
+tmr.alarm(2, 85, 1, function()
+    counter1=counter1+1
+    ws2812.write(string.char(128,0,0):rep(counter1) .. string.char(0,0,0):rep(MAXLEDS - (counter1*2)) .. string.char(0,0,64):rep(counter1))
+end)
+
+local blacklistfile="init.lua config.lua config.lua.new"
+function recompileAll()
+    -- compile all files
+    l = file.list();
+    for k,_ in pairs(l) do
+      if (string.find(k, ".lc", -3)) then
+        print ("Skipping " .. k)
+      elseif  (string.find(blacklistfile, k) == nil) then
+        -- Only look at lua files
+        if (string.find(k, ".lua") ~= nil) then
+            print("Compiling and deleting " .. k)
+            node.compile(k)
+            -- remove the lua file
+            file.remove(k)
+        else
+            print("No code: " .. k)
+        end
+      end
+    end
+end
+
+function mydofile(mod)
+    if (file.open(mod ..  ".lua")) then
+      dofile( mod .. ".lua")
+    else
+      dofile(mod .. ".lc")
+    end
+end    
+
+
+tmr.alarm(1, 5000, 0, function()
+    tmr.stop(2)
+    if (file.open("main.lua")) then    
+        recompileAll()
+        print("Rebooting ...")
+        -- reboot repairs everything
+        node.restart()
+    elseif (file.open("main.lc")) then
+        print("Starting main")      
+        dofile("main.lc")
+    else
+        print("No Main file found")
+    end
+end)

main.lua

@@ -0,0 +1,146 @@
+-- Main Module
+
+function startSetupMode()
+    tmr.stop(0)
+    tmr.stop(1)
+    -- start the webserver module 
+    mydofile("webserver")
+    
+    wifi.setmode(wifi.SOFTAP)
+    cfg={}
+    cfg.ssid="wordclock"
+    cfg.pwd="wordclock"
+    wifi.ap.config(cfg)
+
+    -- Write the buffer to the LEDs
+    local color=string.char(0,128,0)
+    local white=string.char(0,0,0)
+    local ledBuf= white:rep(6) .. color .. white:rep(7) .. color:rep(3) .. white:rep(44) .. color:rep(3) .. white:rep(50)
+    ws2812.write(ledBuf)
+    color=nil
+    white=nil
+    ledBuf=nil
+    
+    print("Waiting in access point >wordclock< for Clients")
+    print("Please visit 192.168.4.1")
+    startWebServer()
+    collectgarbage()
+end
+
+
+function syncTimeFromInternet()
+--ptbtime1.ptb.de
+    sntp.sync(sntpserverhostname,
+     function(sec,usec,server)
+      print('sync', sec, usec, server)
+      displayTime()
+     end,
+     function()
+       print('failed!')
+     end
+   )
+end
+
+function displayTime()
+     sec, usec = rtctime.get()
+     -- Handle lazy programmer:
+     if (timezoneoffset == nil) then
+        timezoneoffset=0
+     end
+     time = getTime(sec, timezoneoffset)
+     words = display_timestat(time.hour, time.minute)
+
+     local charactersOfTime = display_countwords_de(words)
+     ledBuf = generateLEDs(words, color, color1, color2, color3, color4, 
+			    charactersOfTime)
+     
+     print("Local time : " .. time.year .. "-" .. time.month .. "-" .. time.day .. " " .. time.hour .. ":" .. time.minute .. ":" .. time.second .. " in " .. charactersOfTime .. " chars")
+     
+     -- Write the buffer to the LEDs
+     ws2812.write(ledBuf)
+    
+     -- Used for debugging
+     if (clockdebug ~= nil) then
+         for key,value in pairs(words) do 
+            if (value > 0) then
+              print(key,value) 
+            end
+         end
+     end
+     -- cleanup
+     ledBuf=nil
+     words=nil
+     time=nil
+     collectgarbage()
+end
+
+function normalOperation()
+    -- use default color, if nothing is defined
+    if (color == nil) then
+        -- Color is defined as GREEN, RED, BLUE
+        color=string.char(0,0,250)
+    end
+   
+    connect_counter=0
+    -- Wait to be connect to the WiFi access point. 
+    tmr.alarm(0, 1000, 1, function()
+      connect_counter=connect_counter+1
+      if wifi.sta.status() ~= 5 then
+         print(connect_counter ..  "/60 Connecting to AP...")
+         if (connect_counter % 2 == 0) then
+            local wlanColor=string.char((connect_counter % 6)*20,(connect_counter % 5)*20,(connect_counter % 3)*20)
+            local space=string.char(0,0,0)
+            local buf=space:rep(6) .. wlanColor .. space:rep(4)
+            buf= buf .. space:rep(3) .. wlanColor:rep(3)
+            ws2812.write(buf)
+         else
+           ws2812.write(string.char(0,0,0):rep(114))
+         end
+      else
+        tmr.stop(0)
+        print('IP: ',wifi.sta.getip())
+        -- Here the WLAN is found, and something is done
+        print("Solving dependencies")
+        local dependModules = { "timecore" , "wordclock", "displayword" }
+        for _,mod in pairs(dependModules) do
+            print("Loading " .. mod)
+            mydofile(mod)
+        end
+        
+        tmr.alarm(2, 500, 0 ,function()
+            syncTimeFromInternet()
+        end)
+        tmr.alarm(3, 2000, 0 ,function()
+            print("Start webserver...")
+            mydofile("webserver")
+            startWebServer()
+        end)
+
+        displayTime()
+        -- Start the time Thread
+        tmr.alarm(1, 20000, 1 ,function()
+             displayTime()
+         end)
+        
+      end
+      -- when no wifi available, open an accesspoint and ask the user
+      if (connect_counter >= 60) then -- 300 is 30 sec in 100ms cycle
+        startSetupMode()
+      end
+    end)
+    
+    
+end
+
+-------------------main program -----------------------------
+ws2812.init() -- WS2812 LEDs initialized on GPIO2
+
+if ( file.open("config.lua") ) then
+    --- Normal operation
+    wifi.setmode(wifi.STATION)
+    dofile("config.lua")
+    normalOperation()
+else
+    -- Logic for inital setup
+    startSetupMode()
+end

ntpTest.lua

@@ -1,31 +0,0 @@
-dofile("wlancfg.lua")
-
--- Wait to be connect to the WiFi access point. 
-tmr.alarm(0, 100, 1, function()
-  if wifi.sta.status() ~= 5 then
-     print("Connecting to AP...")
-  else
-     tmr.stop(0)
-     -- Switch of the booting lamp
-     gpio.write(5, gpio.LOW)
-     print('IP: ',wifi.sta.getip())
-
-    --ptbtime1.ptb.de
-    sntp.sync('192.53.103.108',
-     function(sec,usec,server)
-      print('sync', sec, usec, server)
-     end,
-     function()
-       print('failed!')
-     end
-   )
-
-  end
-end)
-
-
-tmr.alarm(1, 1000, 1 ,function()
- sec, usec = rtctime.get()
- print("Time : " , sec)
-end)
-

os/Readme.md

@@ -0,0 +1,18 @@
+# Firmware was compiled with the following modules:
+
+   *  LUA_USE_BUILTIN_STRING      // for string.xxx()
+   *  LUA_USE_BUILTIN_TABLE       // for table.xxx()
+   *  LUA_USE_BUILTIN_COROUTINE   // for coroutine.xxx()
+   *  LUA_USE_BUILTIN_MATH        // for math.xxx(), partially work
+   *  LUA_USE_BUILTIN_DEBUG_MINIMAL // for debug.getregistry() and debug.traceback()
+   *  LUA_USE_MODULES_FILE
+   *  LUA_USE_MODULES_GPIO
+   *  LUA_USE_MODULES_NET
+   *  LUA_USE_MODULES_NODE
+   *  LUA_USE_MODULES_RTCTIME
+   *  LUA_USE_MODULES_SNTP
+   *  LUA_USE_MODULES_TMR
+   *  LUA_USE_MODULES_UART
+   *  LUA_USE_MODULES_WIFI
+   *  LUA_USE_MODULES_WS2812
+

os/flash.sh

@@ -9,6 +9,8 @@ if [ $# -ne 1 ]; then
 fi
 
 DEVICE=$1
+#BAUD="--baud 57600"
+#BAUD="--baud 921600"
 
 # check the serial connection
 
@@ -23,11 +25,12 @@ if [ ! -f esptool.py ]; then
  exit 1
 fi
 
-sudo ./esptool.py --port /dev/$DEVICE read_mac
+./esptool.py --port /dev/$DEVICE $BAUD read_mac
 
 if [ $? -ne 0 ]; then
  echo "Error reading the MAC -> set the device into the bootloader!"
  exit 1
 fi
 
-sudo ./esptool.py --port /dev/$DEVICE write_flash 0x00000 0x00000.bin 0x10000 0x10000.bin
+#./esptool.py --port /dev/$DEVICE $BAUD write_flash 0x00000 nodemcu-master-enduser_setup,file,gpio,net,node,rtcfifo,rtcmem,rtctime,sntp,spi,tmr,uart,wifi,ws2812-integer.bin
+./esptool.py --port /dev/ttyUSB0 $BAUD write_flash 0x00000 0x00000.bin 0x10000 0x10000.bin

timecore.lua

@@ -56,13 +56,13 @@ end
 -- Source:
 -- http://www.jbox.dk/sanos/source/lib/time.c.html
 
-YEAR0=1900
+local YEAR0=1900
 
-EPOCH_YR=1970
+local EPOCH_YR=1970
 --SECS_DAY=(24L * 60L * 60L)
-SECS_DAY=86400
+local SECS_DAY=86400
 
-ytab = {}
+local ytab = {}
 ytab[0] = {}
 ytab[1] = {}
 ytab[0][0] = 31
@@ -106,7 +106,7 @@ end
 function getUTCtime(unixtimestmp)
   local year = EPOCH_YR
   local dayclock = math.floor(unixtimestmp % SECS_DAY)
-  dayno = math.floor(unixtimestmp / SECS_DAY)
+  local dayno = math.floor(unixtimestmp / SECS_DAY)
 
   local sec = math.floor(dayclock % 60)
   local min = math.floor( (dayclock % 3600) / 60)
@@ -119,20 +119,20 @@ function getUTCtime(unixtimestmp)
     year=year + 1
   end
   --Day in whole year: local yday = dayno (Not needed)
-  mon = 0
+  local mon = 0
   while (dayno >= ytab[leapyear(year) and 1 or 0][mon])
   do
       dayno = dayno - ytab[leapyear(year) and 1 or 0][mon];
       mon = mon + 1
    end
-   mday = dayno + 1
+   local mday = dayno + 1
 
   return { year = year, month = (mon+1), day = mday, hour = hour, minute = min, second = sec, dow = dow }
 end
 
 
 function getTime(unixtimestmp, timezoneoffset)
-    time = getUTCtime(unixtimestmp + (3600 * timezoneoffset))
+    local time = getUTCtime(unixtimestmp + (3600 * timezoneoffset))
     if ( isSummerTime(time) ) then
         time = getUTCtime(unixtimestmp + (3600 * (timezoneoffset + 1)) )
     end

tools/Readme.md

@@ -0,0 +1,2 @@
+# Source:
+https://github.com/4refr0nt/luatool/tree/master/luatool

tools/initialFlash.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+LUATOOL=./tools/luatool.py
+
+DEVICE=$1
+
+# check the serial connection
+
+if [ ! -c $DEVICE ]; then
+ echo "$DEVICE does not exist"
+ exit 1
+fi
+
+
+if [ $# -ne 1 ]; then
+    echo ""
+    echo "e.g. usage $0 <device>"
+    exit 1
+fi
+
+FILES="displayword.lua main.lua timecore.lua webpage.lua webserver.lua wordclock.lua init.lua"
+# Format filesystem first
+echo "Format the complete ESP"
+$LUATOOL -p $DEVICE -w
+if [ $? -ne 0 ]; then
+    echo "STOOOOP"
+    exit 1
+fi
+
+echo 
+echo "Start Flasing ..."
+for f in $FILES; do
+    if [ ! -f $f ]; then
+        echo "Cannot find $f"
+        echo "place the terminal into the folder where the lua files are present"
+        exit 1
+    fi
+    echo "------------- $f ------------"
+    $LUATOOL -p $DEVICE -f $f -t $f
+    if [ $? -ne 0 ]; then
+        echo "STOOOOP"
+        exit 1
+    fi
+done
+
+echo "Reboot the ESP"
+$LUATOOL -p $DEVICE -r
+
+exit 0

tools/luatool.py

@@ -0,0 +1,326 @@
+#!/usr/bin/python
+#
+# ESP8266 luatool
+# Author e-mail: 4ref0nt@gmail.com
+# Site: http://esp8266.ru
+# Contributions from: https://github.com/sej7278
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
+# Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import sys
+import serial
+from time import sleep
+import socket
+import argparse
+from os.path import basename
+
+
+version = "0.6.4"
+
+
+class TransportError(Exception):
+    """Custom exception to represent errors with a transport
+    """
+    def __init__(self, message):
+        self.message = message
+
+
+class AbstractTransport:
+    def __init__(self):
+        raise NotImplementedError('abstract transports cannot be instantiated.')
+
+    def close(self):
+        raise NotImplementedError('Function not implemented')
+
+    def read(self, length):
+        raise NotImplementedError('Function not implemented')
+
+    def writeln(self, data, check=1):
+        raise NotImplementedError('Function not implemented')
+
+    def writer(self, data):
+        self.writeln("file.writeline([==[" + data + "]==])\r")
+
+    def performcheck(self, expected):
+        line = ''
+        char = ''
+        i = -1
+        while char != chr(62):  # '>'
+            char = self.read(1)
+            if char == '':
+                raise Exception('No proper answer from MCU')
+            if char == chr(13) or char == chr(10):  # LF or CR
+                if line != '':
+                    line = line.strip()
+                    if line+'\r' == expected:
+                        sys.stdout.write(" -> ok")
+                    else:
+                        if line[:4] == "lua:":
+                            sys.stdout.write("\r\n\r\nLua ERROR: %s" % line)
+                            raise Exception('ERROR from Lua interpreter\r\n\r\n')
+                        else:
+                            expected = expected.split("\r")[0]
+                            sys.stdout.write("\r\n\r\nERROR")
+                            sys.stdout.write("\r\n send string    : '%s'" % expected)
+                            sys.stdout.write("\r\n expected echo  : '%s'" % expected)
+                            sys.stdout.write("\r\n but got answer : '%s'" % line)
+                            sys.stdout.write("\r\n\r\n")
+                            raise Exception('Error sending data to MCU\r\n\r\n')
+                    line = ''
+            else:
+                line += char
+                if char == chr(62) and expected[i] == char:
+                    char = ''
+                i += 1
+
+
+class SerialTransport(AbstractTransport):
+    def __init__(self, port, baud, delay):
+        self.port = port
+        self.baud = baud
+        self.serial = None
+        self.delay = delay
+
+        try:
+            self.serial = serial.Serial(port, baud)
+        except serial.SerialException as e:
+            raise TransportError(e.strerror)
+
+        self.serial.timeout = 3
+        self.serial.interCharTimeout = 3
+
+    def writeln(self, data, check=1):
+        if self.serial.inWaiting() > 0:
+            self.serial.flushInput()
+        if len(data) > 0:
+            sys.stdout.write("\r\n->")
+            sys.stdout.write(data.split("\r")[0])
+        self.serial.write(data)
+        sleep(self.delay)
+        if check > 0:
+            self.performcheck(data)
+        else:
+            sys.stdout.write(" -> send without check")
+
+    def read(self, length):
+        return self.serial.read(length)
+
+    def close(self):
+        self.serial.flush()
+        self.serial.close()
+
+
+class TcpSocketTransport(AbstractTransport):
+    def __init__(self, host, port):
+        self.host = host
+        self.port = port
+        self.socket = None
+
+        try:
+            self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        except socket.error as e:
+            raise TransportError(e.strerror)
+
+        try:
+            self.socket.connect((host, port))
+        except socket.error as e:
+            raise TransportError(e.strerror)
+        # read intro from telnet server (see telnet_srv.lua)
+        self.socket.recv(50)
+
+    def writeln(self, data, check=1):
+        if len(data) > 0:
+            sys.stdout.write("\r\n->")
+            sys.stdout.write(data.split("\r")[0])
+        self.socket.sendall(data)
+        if check > 0:
+            self.performcheck(data)
+        else:
+            sys.stdout.write(" -> send without check")
+
+    def read(self, length):
+        return self.socket.recv(length)
+
+    def close(self):
+        self.socket.close()
+
+
+def decidetransport(cliargs):
+    if cliargs.ip:
+        data = cliargs.ip.split(':')
+        host = data[0]
+        if len(data) == 2:
+            port = int(data[1])
+        else:
+            port = 23
+        return TcpSocketTransport(host, port)
+    else:
+        return SerialTransport(cliargs.port, cliargs.baud, cliargs.delay)
+
+
+if __name__ == '__main__':
+    # parse arguments or use defaults
+    parser = argparse.ArgumentParser(description='ESP8266 Lua script uploader.')
+    parser.add_argument('-p', '--port',    default='/dev/ttyUSB0', help='Device name, default /dev/ttyUSB0')
+    parser.add_argument('-b', '--baud',    default=9600,           help='Baudrate, default 9600')
+    parser.add_argument('-f', '--src',     default='main.lua',     help='Source file on computer, default main.lua')
+    parser.add_argument('-t', '--dest',    default=None,           help='Destination file on MCU, default to source file name')
+    parser.add_argument('-c', '--compile', action='store_true',    help='Compile lua to lc after upload')
+    parser.add_argument('-r', '--restart', action='store_true',    help='Restart MCU after upload')
+    parser.add_argument('-d', '--dofile',  action='store_true',    help='Run the Lua script after upload')
+    parser.add_argument('-v', '--verbose', action='store_true',    help="Show progress messages.")
+    parser.add_argument('-a', '--append',  action='store_true',    help='Append source file to destination file.')
+    parser.add_argument('-l', '--list',    action='store_true',    help='List files on device')
+    parser.add_argument('-w', '--wipe',    action='store_true',    help='Delete all lua/lc files on device.')
+    parser.add_argument('-i', '--id',      action='store_true',    help='Query the modules chip id.')
+    parser.add_argument('-e', '--echo',    action='store_true',    help='Echo output of MCU until script is terminated.')
+    parser.add_argument('--delay',         default=0.3,            help='Delay in seconds between each write.', type=float)
+    parser.add_argument('--delete',        default=None,           help='Delete a lua/lc file from device.')
+    parser.add_argument('--ip',            default=None,           help='Connect to a telnet server on the device (--ip IP[:port])')
+    args = parser.parse_args()
+
+    transport = decidetransport(args)
+
+    if args.list:
+        transport.writeln("local l = file.list();for k,v in pairs(l) do print('name:'..k..', size:'..v)end\r", 0)
+        while True:
+            char = transport.read(1)
+            if char == '' or char == chr(62):
+                break
+            sys.stdout.write(char)
+        sys.exit(0)
+
+    if args.id:
+        transport.writeln("=node.chipid()\r", 0)
+        id=""
+        while True:
+            char = transport.read(1)
+            if char == '' or char == chr(62):
+                break
+            if char.isdigit():
+                id += char
+        print("\n"+id)
+        sys.exit(0)
+
+    if args.wipe:
+        transport.writeln("local l = file.list();for k,v in pairs(l) do print(k)end\r", 0)
+        file_list = []
+        fn = ""
+        while True:
+            char = transport.read(1)
+            if char == '' or char == chr(62):
+                break
+            if char not in ['\r', '\n']:
+                fn += char
+            else:
+                if fn:
+                    file_list.append(fn.strip())
+                fn = ''
+        for fn in file_list[1:]:  # first line is the list command sent to device
+            if args.verbose:
+                sys.stderr.write("Delete file {} from device.\r\n".format(fn))
+            transport.writeln("file.remove(\"" + fn + "\")\r")
+        sys.exit(0)
+
+    if args.delete:
+        transport.writeln("file.remove(\"" + args.delete + "\")\r")
+        sys.exit(0)
+
+    if args.dest is None:
+        args.dest = basename(args.src)
+
+    # open source file for reading
+    try:
+        f = open(args.src, "rt")
+    except:
+        sys.stderr.write("Could not open input file \"%s\"\n" % args.src)
+        sys.exit(1)
+
+    # Verify the selected file will not exceed the size of the serial buffer.
+    # The size of the buffer is 256. This script does not accept files with
+    # lines longer than 230 characters to have some room for command overhead.
+    for ln in f:
+        if len(ln) > 230:
+            sys.stderr.write("File \"%s\" contains a line with more than 240 "
+                             "characters. This exceeds the size of the serial buffer.\n"
+                             % args.src)
+            f.close()
+            sys.exit(1)
+
+    # Go back to the beginning of the file after verifying it has the correct
+    # line length
+    f.seek(0)
+
+    # set serial timeout
+    if args.verbose:
+        sys.stderr.write("Upload starting\r\n")
+
+    # remove existing file on device
+    if args.append==False:
+        if args.verbose:
+            sys.stderr.write("Stage 1. Deleting old file from flash memory")
+        transport.writeln("file.open(\"" + args.dest + "\", \"w\")\r")
+        transport.writeln("file.close()\r")
+        transport.writeln("file.remove(\"" + args.dest + "\")\r")
+    else:
+        if args.verbose:
+            sys.stderr.write("[SKIPPED] Stage 1. Deleting old file from flash memory [SKIPPED]")
+
+
+    # read source file line by line and write to device
+    if args.verbose:
+        sys.stderr.write("\r\nStage 2. Creating file in flash memory and write first line")
+    if args.append:
+        transport.writeln("file.open(\"" + args.dest + "\", \"a+\")\r")
+    else:
+        transport.writeln("file.open(\"" + args.dest + "\", \"w+\")\r")
+    line = f.readline()
+    if args.verbose:
+        sys.stderr.write("\r\nStage 3. Start writing data to flash memory...")
+    while line != '':
+        transport.writer(line.strip())
+        line = f.readline()
+
+    # close both files
+    f.close()
+    if args.verbose:
+        sys.stderr.write("\r\nStage 4. Flush data and closing file")
+    transport.writeln("file.flush()\r")
+    transport.writeln("file.close()\r")
+
+    # compile?
+    if args.compile:
+        if args.verbose:
+            sys.stderr.write("\r\nStage 5. Compiling")
+        transport.writeln("node.compile(\"" + args.dest + "\")\r")
+        transport.writeln("file.remove(\"" + args.dest + "\")\r")
+
+    # restart or dofile
+    if args.restart:
+        transport.writeln("node.restart()\r")
+    if args.dofile:   # never exec if restart=1
+        transport.writeln("dofile(\"" + args.dest + "\")\r", 0)
+
+    if args.echo:
+        if args.verbose:
+            sys.stderr.write("\r\nEchoing MCU output, press Ctrl-C to exit")
+        while True:
+            sys.stdout.write(transport.read(1))
+
+    # close serial port
+    transport.close()
+
+    # flush screen
+    sys.stdout.flush()
+    sys.stderr.flush()
+    sys.stderr.write("\r\n--->>> All done <<<---\r\n")

unit/testWordClock.lua

@@ -1,6 +1,7 @@
 -- Example usage of the word clock
 dofile("../wordclock.lua")
 
+print "------- Manual test ----"
 -- Manually set something
 leds=display_timestat(15,30)
 for k,v in pairs(leds) do 
@@ -8,6 +9,7 @@ for k,v in pairs(leds) do
         print(k) 
     end
 end
+print "---------------------"
 
 function checkWords(leds, expected, hour, min)
   for k, v in pairs(leds) do
@@ -34,6 +36,19 @@ function checkWords(leds, expected, hour, min)
   print(hour .. ":" .. min)
 end
 
+function checkCharacter(words, expected)
+    if (words == nil or expected == nil) then
+     print("Not all parameter set to checkCharacter")
+     os.exit(1)
+    end
+    if (words ~= expected) then
+        print("Not all character found. Expected " .. expected .. ", but found " .. words)
+        os.exit(1)
+    end
+end
+
+print ""
+print "----------- Unit tests -------------"
 -- Unit tests
 leds=display_timestat(1,0)
 expected={}
@@ -41,6 +56,7 @@ expected.itis=1
 expected.one=1
 expected.clock=1
 checkWords(leds, expected, 1, 0)
+checkCharacter(display_countwords_de(leds), 11)
 
 leds=display_timestat(2,5)
 expected={}
@@ -48,6 +64,7 @@ expected.two=1
 expected.fiveMin=1
 expected.after=1
 checkWords(leds, expected, 2 , 5)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(3,10)
 expected={}
@@ -55,6 +72,7 @@ expected.three=1
 expected.tenMin=1
 expected.after=1
 checkWords(leds, expected, 3 , 10)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(4,15)
 expected={}
@@ -62,14 +80,15 @@ expected.four=1
 expected.after=1
 expected.quater=1
 checkWords(leds, expected, 4 , 15)
+checkCharacter(display_countwords_de(leds), 15)
 
 leds=display_timestat(5,20)
 expected={}
-expected.six=1
+expected.five=1
-expected.tenMin=1
+expected.twenty=1
-expected.before=1
+expected.after=1
-expected.half=1
 checkWords(leds, expected, 5 , 20)
+checkCharacter(display_countwords_de(leds), 15)
 
 leds=display_timestat(6,25)
 expected={}
@@ -78,6 +97,7 @@ expected.fiveMin=1
 expected.before=1
 expected.half=1
 checkWords(leds, expected, 6 , 25)
+checkCharacter(display_countwords_de(leds), 17)
 
 leds=display_timestat(7,30)
 expected={}
@@ -85,6 +105,7 @@ expected.itis=1
 expected.eight=1
 expected.half=1
 checkWords(leds, expected, 7 , 30)
+checkCharacter(display_countwords_de(leds), 13)
 
 leds=display_timestat(8,35)
 expected={}
@@ -93,14 +114,15 @@ expected.half=1
 expected.fiveMin=1
 expected.after=1
 checkWords(leds, expected, 8 , 35)
+checkCharacter(display_countwords_de(leds), 16)
 
 leds=display_timestat(9,40)
 expected={}
 expected.ten=1
-expected.half=1
+expected.twenty=1
-expected.tenMin=1
+expected.before=1
-expected.after=1
 checkWords(leds, expected, 9 , 40)
+checkCharacter(display_countwords_de(leds), 14)
 
 leds=display_timestat(10,45)
 expected={}
@@ -108,6 +130,7 @@ expected.eleven=1
 expected.quater=1
 expected.before=1
 checkWords(leds, expected, 10 , 45)
+checkCharacter(display_countwords_de(leds), 13)
 
 leds=display_timestat(11,50)
 expected={}
@@ -115,13 +138,15 @@ expected.twelve=1
 expected.tenMin=1
 expected.before=1
 checkWords(leds, expected, 11 , 50)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(12,55)
 expected={}
-expected.one=1
+expected.oneLong=1
 expected.fiveMin=1
 expected.before=1
 checkWords(leds, expected, 12 , 55)
+checkCharacter(display_countwords_de(leds), 11)
 
 leds=display_timestat(13,00)
 expected={}
@@ -129,6 +154,7 @@ expected.itis=1
 expected.one=1
 expected.clock=1
 checkWords(leds, expected, 13 , 00)
+checkCharacter(display_countwords_de(leds), 11)
 
 -- test the minutes inbetween
 leds=display_timestat(14,01)
@@ -138,6 +164,7 @@ expected.two=1
 expected.min1=1
 expected.clock=1
 checkWords(leds, expected, 14 , 01)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(15,02)
 expected={}
@@ -146,6 +173,7 @@ expected.three=1
 expected.min2=1
 expected.clock=1
 checkWords(leds, expected, 15 , 02)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(16,03)
 expected={}
@@ -154,6 +182,7 @@ expected.four=1
 expected.min3=1
 expected.clock=1
 checkWords(leds, expected, 16 , 03)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(17,04)
 expected={}
@@ -162,6 +191,7 @@ expected.five=1
 expected.min4=1
 expected.clock=1
 checkWords(leds, expected, 17 , 04)
+checkCharacter(display_countwords_de(leds), 12)
 
 leds=display_timestat(18,06)
 expected={}
@@ -170,6 +200,7 @@ expected.after=1
 expected.min1=1
 expected.six=1
 checkWords(leds, expected, 18 , 06)
+checkCharacter(display_countwords_de(leds), 13)
 
 leds=display_timestat(19,09)
 expected={}
@@ -178,6 +209,7 @@ expected.after=1
 expected.min4=1
 expected.seven=1
 checkWords(leds, expected, 19 , 09)
+checkCharacter(display_countwords_de(leds), 14)
 
 leds=display_timestat(20,17)
 expected={}
@@ -186,6 +218,7 @@ expected.after=1
 expected.min2=1
 expected.eight=1
 checkWords(leds, expected, 20 , 17)
+checkCharacter(display_countwords_de(leds), 15)
 
 
 

webpage.html

@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<html><head><title>WordClock Setup Page</title>
+<style type="text/css">
+#table-6 {
+width: 100%
+border: 1px solid #B0B0B0;
+}
+#table-6 tbody {
+/* Kind of irrelevant unless your .css is alreadt doing something else */
+margin: 0;
+padding: 0;
+border: 0;
+outline: 0;
+font-size: 100%;
+vertical-align: baseline;
+background: transparent;
+}
+#table-6 thead {
+text-align: left;<tr><th>Three quater</th><td><input type="checkbox" name="threequater" ></td><td>Dreiviertel Joa/nei</td></tr>
+
+}
+#table-6 thead th {
+background: -moz-linear-gradient(top, #F0F0F0 0, #DBDBDB 100%);
+background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #F0F0F0), color-stop(100%, #DBDBDB));
+filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#F0F0F0', endColorstr='#DBDBDB', GradientType=0);
+border: 1px solid #B0B0B0;
+color: #444;
+font-size: 16px;
+font-weight: bold;
+padding: 3px 10px;
+}
+#table-6 td {
+padding: 3px 10px;
+
+}
+#table-6 tr:nth-child(even) {
+background: #F2F2F2;
+}
+</style></head>
+<body>
+<h1>Welcome to the WordClock</h1>
+<h2>Initial Setup</h2>
+Please note that all settings are mandatory<br /><br />
+<form action="/" method="POST">
+<table id="table-6">
+<tr><th><b>WIFI-SSID</b></th><td><input id="ssid" name="ssid" value="$SSID"></td><td>SSID of the wireless network</td></tr>
+<tr><th>WIFI-Password</th><td><input id="password" name="password"></td><td>Password of the wireless network</td></tr>
+<tr><th>SNTP Server</th><td><input id="sntpserver" name="sntpserver" value="$SNTPSERVER"></td><td>Server to sync the time with. Only one ntp server is allowed.</tr>
+<tr><th>Offset to UTC time</th><td><input id="timezoneoffset" name="timezoneoffset" value="$TIMEOFFSET"></td><td>Define the offset to UTC time in hours. For example +1 hour for Germany</tr>
+<tr><th>Foreground Color</th><td><input type="color" name="fcolor" value="$HEXCOLORFG"></td><td>LED Color for all minutes, divisible by five</td></tr>
+<tr><th>Background Color</th><td><input type="color" name="bcolor" value="$HEXCOLORBG"></td><td>Background LED Color</td></tr>
+<tr><th>1. Minute Color</th><td><input type="color" name="colorMin1" value="$HEXCOLOR1"></td><td>First minute after</td></tr>
+<tr><th>2. Minute Color</th><td><input type="color" name="colorMin2" value="$HEXCOLOR2"></td><td>Second minute after</td></tr>
+<tr><th>3. Minute Color</th><td><input type="color" name="colorMin3" value="$HEXCOLOR3"></td><td>Third minute after</td></tr>
+<tr><th>4. Minute Color</th><td><input type="color" name="colorMin4" value="$HEXCOLOR4"></td><td>Fourth minute after</td></tr>
+
+<tr><th>Three quater</th><td><input type="checkbox" name="threequater" $THREEQUATER></td><td>Dreiviertel Joa/nei</td></tr>
+<tr><td colspan="3"><div align="center"><input type="submit" value="Save Configuration" onclick="this.value='Submitting ..';this.disabled='disabled'; this.form.submit();"></div></td></tr>
+<tr><td colspan="3"><div align="center"><input type="submit" name="action" value="Reboot"></div></td></tr>
+</table>
+</form>
+$ADDITIONAL_LINE
+</body>
+</html>

webserver.lua

@@ -0,0 +1,295 @@
+--TODO:
+
+configFile="config.lua"
+
+sentBytes=0
+function sendPage(conn, nameOfFile, replaceMap)
+  collectgarbage()
+  print("Sending " .. nameOfFile .. " " .. sentBytes .. "B already; " .. node.heap() .. "B in heap")
+  conn:on("sent", function(conn) 
+    if (sentBytes == 0) then
+        conn:close() 
+        print("Page sent")
+        collectgarbage()
+    else
+        print("Next") 
+        sendPage(conn, nameOfFile, replaceMap)
+    end
+  end)
+
+  if file.open(nameOfFile, "r") then
+    local buf=""
+    if (sentBytes <= 0) then
+        buf=buf .. "HTTP/1.1 200 OK\r\n"
+        buf=buf .. "Content-Type: text/html\r\n"
+        buf=buf .. "Connection: close\r\n"
+        buf=buf .. "Date: Thu, 29 Dec 2016 20:18:20 GMT\r\n"
+        buf=buf .. "\r\n\r\n"
+    end
+    -- amount of sent bytes is always zero at the beginning (so no problem)
+    file.seek("set", sentBytes)
+    
+    local line = file.readline()
+    
+    while (line ~= nil) do
+        -- increase the amount of sent bytes
+        sentBytes=sentBytes+string.len(line)
+        
+        -- all placeholder begin with a $, so search for it in the current line
+        if (line:find("$") ~= nil) then
+            -- Replace the placeholder with the dynamic content
+            if (replaceMap ~= nil) then
+                for key,value in pairs(replaceMap) 
+                do 
+                    line = string.gsub(line, key, value)
+                end
+            end
+        end
+        buf = buf .. line
+        
+        -- Sent after 1k data
+        if (string.len(buf) >= 700) then
+            line=nil
+            conn:send(buf)
+            print("Sent part of " .. sentBytes .. "B")
+            -- end the function, this part is sent
+            return 
+        else
+            -- fetch the next line
+            line = file.readline()
+        end
+    end
+    --reset amount of sent bytes, as we reached the end
+    sentBytes=0
+    -- send the rest
+    conn:send(buf)
+    print("Sent rest")
+  end
+  
+end
+
+function fillDynamicMap()    
+    replaceMap = {}
+    ssid, _ = wifi.sta.getconfig()
+
+    if (ssid == nil) then
+        ssid="Not set"
+    end
+    if (sntpserverhostname == nil) then
+        sntpserverhostname="ptbtime1.ptb.de"
+    end
+    if (timezoneoffset == nil) then
+        timezoneoffset=1
+    end
+    -- Set the default color, if nothing is set
+    if (color == nil) then
+        color=string.char(0,0,250)
+    end
+    if (color1 == nil) then
+        color1=color
+    end
+    if (color2 == nil) then
+        color2=color
+    end
+    if (color3 == nil) then
+        color3=color
+    end
+    if (color4 == nil) then
+        color4=color
+    end
+    if (colorBg == nil) then
+        colorBg=string.char(0,0,0) -- black is the default background color
+    end
+    local hexColor = "#" .. string.format("%02x",string.byte(color,2)) .. string.format("%02x",string.byte(color,1)) .. string.format("%02x",string.byte(color,3))
+    local hexColor1 = "#" .. string.format("%02x",string.byte(color1,2)) .. string.format("%02x",string.byte(color1,1)) .. string.format("%02x",string.byte(color1,3))
+    local hexColor2 = "#" .. string.format("%02x",string.byte(color2,2)) .. string.format("%02x",string.byte(color2,1)) .. string.format("%02x",string.byte(color2,3))
+    local hexColor3 = "#" .. string.format("%02x",string.byte(color3,2)) .. string.format("%02x",string.byte(color3,1)) .. string.format("%02x",string.byte(color3,3))
+    local hexColor4 = "#" .. string.format("%02x",string.byte(color4,2)) .. string.format("%02x",string.byte(color4,1)) .. string.format("%02x",string.byte(color4,3))
+    local hexColorBg = "#" .. string.format("%02x",string.byte(colorBg,2)) .. string.format("%02x",string.byte(colorBg,1)) .. string.format("%02x",string.byte(colorBg,3))
+
+    replaceMap["$SSID"]=ssid
+    replaceMap["$SNTPSERVER"]=sntpserverhostname
+    replaceMap["$TIMEOFFSET"]=timezoneoffset
+    replaceMap["$THREEQUATER"]=(threequater and "checked" or "")
+    replaceMap["$ADDITIONAL_LINE"]=""
+    replaceMap["$HEXCOLORFG"]=hexColor
+    replaceMap["$HEXCOLOR1"]=hexColor1
+    replaceMap["$HEXCOLOR2"]=hexColor2
+    replaceMap["$HEXCOLOR3"]=hexColor3
+    replaceMap["$HEXCOLOR4"]=hexColor4
+    replaceMap["$HEXCOLORBG"]=hexColorBg
+    return replaceMap   
+end
+
+function startWebServer()
+ srv=net.createServer(net.TCP)
+ srv:listen(80,function(conn)
+  conn:on("receive", function(conn,payload)
+   
+   if (payload:find("GET /") ~= nil) then
+   --here is code for handling http request from a web-browser
+    
+    if (sendPage ~= nil) then
+       print("Sending webpage.html ...")
+       -- Load the sendPagewebcontent
+       replaceMap=fillDynamicMap()
+       sendPage(conn, "webpage.html", replaceMap)
+    end
+    
+   else if (payload:find("POST /") ~=nil) then
+    --code for handling the POST-request (updating settings)
+     _, postdatastart = payload:find("\r\n\r\n")
+     --Next lines catches POST-requests without POST-data....
+     if postdatastart==nil then postdatastart = 1 end
+     local postRequestData=string.sub(payload,postdatastart+1)
+     local _POST = {}
+     for i, j in string.gmatch(postRequestData, "(%w+)=([^&]+)&*") do
+       _POST[i] = j
+     end
+
+     --- Do the magic!
+     if (_POST.action ~= nil and _POST.action == "Reboot") then
+        node.restart()
+        return
+     end
+
+    if ((_POST.ssid~=nil) and (_POST.sntpserver~=nil) and (_POST.timezoneoffset~=nil)) then
+        print("New config!")
+        if (_POST.password==nil) then
+            _, password, _, _ = wifi.sta.getconfig()
+            print("Restoring password : " .. password)
+            _POST.password = password
+            password = nil
+        end
+        -- Safe configuration:
+        file.remove(configFile .. ".new")
+        sec, _ = rtctime.get()
+        file.open(configFile.. ".new", "w+")
+        file.write("-- Config\n" .. "wifi.sta.config(\"" .. _POST.ssid .. "\",[[" .. _POST.password .. "]])\n" .. "sntpserverhostname=\"" .. _POST.sntpserver .. "\"\n" .. "timezoneoffset=\"" .. _POST.timezoneoffset .. "\"\n")
+        if ( _POST.fcolor ~= nil) then
+            -- color=string.char(_POST.green, _POST.red, _POST.blue)  
+            print ("Got fcolor: " .. _POST.fcolor)
+            local hexColor=string.sub(_POST.fcolor, 4)
+            local red = tonumber(string.sub(hexColor, 1, 2), 16)
+            local green = tonumber(string.sub(hexColor, 3, 4), 16)
+            local blue = tonumber(string.sub(hexColor, 5, 6), 16)
+            file.write("color=string.char(" .. green .. "," .. red .. "," .. blue .. ")\n")
+            -- fill the current values
+            color=string.char(green, red, blue)
+        end
+        if ( _POST.colorMin1  ~= nil) then
+            local hexColor=string.sub(_POST.colorMin1, 4)
+            local red = tonumber(string.sub(hexColor, 1, 2), 16)
+            local green = tonumber(string.sub(hexColor, 3, 4), 16)
+            local blue = tonumber(string.sub(hexColor, 5, 6), 16)
+            file.write("color1=string.char(" .. green .. "," .. red .. "," .. blue .. ")\n")
+            -- fill the current values
+            color1=string.char(green, red, blue)
+        end
+        if ( _POST.colorMin2  ~= nil) then
+            local hexColor=string.sub(_POST.colorMin2, 4)
+            local red = tonumber(string.sub(hexColor, 1, 2), 16)
+            local green = tonumber(string.sub(hexColor, 3, 4), 16)
+            local blue = tonumber(string.sub(hexColor, 5, 6), 16)
+            file.write("color2=string.char(" .. green .. "," .. red .. "," .. blue .. ")\n")
+            -- fill the current values
+            color2=string.char(green, red, blue)
+        end
+        if ( _POST.colorMin3  ~= nil) then
+            local hexColor=string.sub(_POST.colorMin3, 4)
+            local red = tonumber(string.sub(hexColor, 1, 2), 16)
+            local green = tonumber(string.sub(hexColor, 3, 4), 16)
+            local blue = tonumber(string.sub(hexColor, 5, 6), 16)
+            file.write("color3=string.char(" .. green .. "," .. red .. "," .. blue .. ")\n")
+            -- fill the current values
+            color3=string.char(green, red, blue)
+        end
+        if ( _POST.colorMin4  ~= nil) then
+            local hexColor=string.sub(_POST.colorMin4, 4)
+            local red = tonumber(string.sub(hexColor, 1, 2), 16)
+            local green = tonumber(string.sub(hexColor, 3, 4), 16)
+            local blue = tonumber(string.sub(hexColor, 5, 6), 16)
+            file.write("color4=string.char(" .. green .. "," .. red .. "," .. blue .. ")\n")
+            -- fill the current values
+            color4=string.char(green, red, blue)
+        end
+        if ( _POST.bcolor  ~= nil) then
+            local hexColor=string.sub(_POST.bcolor, 4)
+            local red = tonumber(string.sub(hexColor, 1, 2), 16)
+            local green = tonumber(string.sub(hexColor, 3, 4), 16)
+            local blue = tonumber(string.sub(hexColor, 5, 6), 16)
+            file.write("colorBg=string.char(" .. green .. "," .. red .. "," .. blue .. ")\n")
+            -- fill the current values
+            colorBg=string.char(green, red, blue)
+        end
+        if (getTime ~= nil) then
+            time = getTime(sec, timezoneoffset)
+            file.write("print(\"Config from " .. time.year .. "-" .. time.month .. "-" .. time.day .. " " .. time.hour .. ":" .. time.minute .. ":" .. time.second .. "\")\n")
+        end
+        if (_POST.threequater ~= nil) then
+            file.write("threequater=true\n")
+            -- fill the current values
+            threequater=true
+        else
+            file.write("threequater=nil\n") -- unset threequater
+            -- fill the current values
+            threequater=nil
+        end
+        file.close()
+        collectgarbage()
+        sec=nil
+        file.remove(configFile)
+        print("Rename config")
+        if (file.rename(configFile .. ".new", configFile)) then
+            print("Successfully")
+            tmr.alarm(3, 20, 0 ,function()
+                replaceMap=fillDynamicMap()
+                replaceMap["$ADDITIONAL_LINE"]="<h2><font color=\"green\">New configuration saved</font></h2>"
+                print("Send success to client")
+                sendPage(conn, "webpage.html", replaceMap)
+            end)
+        else
+            tmr.alarm(3, 20, 0 ,function()
+                replaceMap=fillDynamicMap()
+                replaceMap["$ADDITIONAL_LINE"]="<h2><font color=\"red\">ERROR</font></h2>"
+                sendPage(conn, "webpage.html", replaceMap)
+            end)
+        end
+  else
+      replaceMap=fillDynamicMap()
+      replaceMap["$ADDITIONAL_LINE"]="<h2><font color=\"orange\">Not all parameters set</font></h2>"
+      sendPage(conn, "webpage.html", replaceMap)
+  end
+    else
+     print("Hello via telnet")
+     --here is code, if the connection is not from a webbrowser, i.e. telnet or nc
+     global_c=conn
+     function s_output(str)
+      if(global_c~=nil)
+        then global_c:send(str)
+      end
+     end    
+     node.output(s_output, 0)
+     global_c:on("receive",function(c,l)
+       node.input(l)
+     end)
+     global_c:on("disconnection",function(c)
+       node.output(nil)
+       global_c=nil
+     end)
+     print("Welcome to Word Clock")
+     
+    end
+   end
+   end)
+    
+  conn:on("disconnection", function(c)
+          print("Goodbye")
+          node.output(nil)        -- un-register the redirect output function, output goes to serial
+          
+          --reset amount of sent bytes, as we reached the end
+          sentBytes=0
+       end)
+ end)
+
+end

wlancfg.lua.example

@@ -1,3 +0,0 @@
--- Tell the chip to connect to thi access point
-wifi.setmode(wifi.STATION)
-wifi.sta.config("SSID","password")

wordclock.lua

@@ -1,16 +1,20 @@
 -- Revese engeeniered code of display_wc_ger.c by Vlad Tepesch
 -- See https://www.mikrocontroller.net/articles/Word_Clock_Variante_1#Download
 
--- Return the leds to use
+-- @fn display_timestat
--- the granuality is 5 minutes
+-- Return the leds to use the granuality is 5 minutes
+-- @param hours the current hours (0-23)
+-- @param minutes the current minute (0-59)
+-- @param longmode (optional parameter) 0: no long mode, 1: long mode (itis will be set)
 function display_timestat(hours, minutes, longmode)
  if (longmode == nil) then
    longmode=0
  end
 
  -- generate an empty return type
- local ret = { itis=0, fiveMin=0, tenMin=0, after=0, before=0, threeHour=0, quater=0, half=0, s=0, 
+ local ret = { itis=0, fiveMin=0, tenMin=0, after=0, before=0, threeHour=0, quater=0, threequater=0, half=0, s=0, 
-               one=0, two=0, three=0, four=0, five=0, six=0, seven=0, eight=0, nine=0, ten=0, eleven=0, twelve=0,
+               one=0, oneLong=0, two=0, three=0, four=0, five=0, six=0, seven=0, eight=0, nine=0, ten=0, eleven=0, twelve=0,
+               twenty=0, 
                clock=0, sr_nc=0, min1=0, min2=0, min3=0, min4=0 }
 
  -- return black screen if there is no real time given
@@ -20,7 +24,7 @@ function display_timestat(hours, minutes, longmode)
 
  -- transcode minutes
  local minutesLeds = minutes%5
- minutes=math.floor(minutes/5)
+ local minutes=math.floor(minutes/5)
 
  -- "It is" only display each half hour and each hour
  -- or if longmode is set
@@ -42,9 +46,8 @@ function display_timestat(hours, minutes, longmode)
     ret.quater=1
     ret.after=1
    elseif (minutes==4) then
-    ret.tenMin=1
+    ret.twenty=1
-    ret.half=1
+    ret.after=1
-    ret.before=1
    elseif (minutes==5) then
     ret.fiveMin=1
     ret.half=1
@@ -56,12 +59,16 @@ function display_timestat(hours, minutes, longmode)
     ret.half=1
     ret.after=1
    elseif (minutes==8) then 
-    ret.tenMin=1
+    ret.twenty=1
-    ret.half=1
+    ret.before=1
-    ret.after=1
    elseif (minutes==9) then
+    -- Hande if three quater or quater before is displayed
+    if (threequater ~= nil) then
+        ret.threequater=1
+    else
         ret.quater = 1
         ret.before = 1
+    end
    elseif (minutes==10) then 
     ret.tenMin=1
     ret.before=1
@@ -70,7 +77,7 @@ function display_timestat(hours, minutes, longmode)
     ret.before=1
    end
 
-   if (minutes >= 4) then
+   if (minutes > 4) then
     hours=hours+1
    end
  else
@@ -97,7 +104,11 @@ function display_timestat(hours, minutes, longmode)
  end
  
  if (hours == 1) then
+  if (ret.before == 1) then
+    ret.oneLong = 1
+  else
     ret.one=1
+  end
  elseif (hours == 2) then
   ret.two=1
  elseif (hours == 3) then
@@ -121,6 +132,85 @@ function display_timestat(hours, minutes, longmode)
  elseif (hours == 12) then
   ret.twelve=1 
  end
- 
+ collectgarbage()
  return ret
 end
+
+-- @fn display_countwords
+-- Count the amount of characters, used to describe the current time in words
+-- @param words the same structure, as generated with the function @see display_timestat
+-- @return the amount of words, used to describe the time or <code>0</code> on errors
+function display_countwords_de(words)
+   local amount=0
+   if (words.itis == 1) then
+    amount = amount + 5
+   end
+   if (words.fiveMin == 1) then
+    amount = amount + 4
+   end
+   if (words.tenMin == 1) then
+    amount = amount + 4
+   end
+   if (words.twenty == 1) then
+    amount = amount + 7
+   end
+   if (words.threequater == 1) then
+    amount = amount + 11
+   end
+   if (words.quater == 1) then
+    amount = amount + 7
+   end
+   if (words.before == 1) then
+    amount = amount + 3
+   end
+   if (words.after == 1) then
+    amount = amount + 4
+   end
+   if (words.half == 1) then
+    amount = amount + 4
+   end
+   if (words.twelve == 1) then
+    amount = amount + 5
+   end
+   if (words.seven == 1) then
+    amount = amount + 6
+   end
+   if (words.one == 1) then
+    amount = amount + 3
+   end
+   if (words.oneLong == 1) then
+    amount = amount + 4
+   end
+   if (words.two == 1) then
+    amount = amount + 4
+   end
+   if (words.three == 1) then
+    amount = amount + 4
+   end
+   if (words.five == 1) then
+    amount = amount + 4
+   end
+   if (words.four == 1) then
+    amount = amount + 4
+   end
+   if (words.nine == 1) then
+    amount = amount + 4
+   end
+   if (words.eleven == 1) then
+    amount = amount + 3
+   end
+   if (words.eight == 1) then
+    amount = amount + 4
+   end
+   if (words.ten == 1) then
+    amount = amount + 4
+   end
+   if (words.clock == 1) then
+    amount = amount + 3
+   end
+   if (words.six == 1) then
+    amount = amount + 5
+   end
+
+   return amount 
+end