From b44eb6f13eb81db5053036c9d3055c71cad957a4 Mon Sep 17 00:00:00 2001
From: Ollo <Ollo@host>
Date: Thu, 14 Jan 2021 22:14:59 +0100
Subject: [PATCH] Background can be changed via MQTT

---
 displayword.lua |  7 ++++++-
 main.lua        |  2 +-
 mqtt.lua        | 16 +++++++++++-----
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/displayword.lua b/displayword.lua
index a87c43d..d725b84 100644
--- a/displayword.lua
+++ b/displayword.lua
@@ -54,7 +54,7 @@ end
 local data={}
 
 -- Module displaying of the words
-local generateLEDs = function(words, colorFg, colorMin1, colorMin2, colorMin3, colorMin4, invertRows, amountOfChars)
+local generateLEDs = function(words, colorBg, colorFg, colorMin1, colorMin2, colorMin3, colorMin4, invertRows, amountOfChars)
  -- Set the local variables needed for the colored progress bar
  if (words == nil) then
    return nil
@@ -103,9 +103,14 @@ local generateLEDs = function(words, colorFg, colorMin1, colorMin2, colorMin3, c
  end
  data.drawnCharacters=0
  local charsPerLine=11
+ 
  -- Space / background has no color by default
  local space=string.char(0,0,0)
 
+ if (colorBg ~= nil) then
+  space = colorBg
+ end
+
  -- Set the foreground color as the default color
  local buf=data.colorFg
  local line=space
diff --git a/main.lua b/main.lua
index cd85dc3..2497c2b 100644
--- a/main.lua
+++ b/main.lua
@@ -72,7 +72,7 @@ function displayTime()
             invertRows=true
         end
         local characters = displayword.countChars(words)
-        ledBuf = displayword.generateLEDs(words, color, color1, color2, color3, color4, invertRows, characters)
+        ledBuf = displayword.generateLEDs(words, colorBg, color, color1, color2, color3, color4, invertRows, characters)
      end
      displayword = nil
      if (ledBuf ~= nil) then
diff --git a/mqtt.lua b/mqtt.lua
index 2959cdd..a1141ee 100644
--- a/mqtt.lua
+++ b/mqtt.lua
@@ -16,15 +16,21 @@ function registerMqtt()
         elseif (data == "OFF") then
           briPercent=0
           m:publish(mqttPrefix .. "/clock", "OFF", 0, 0)
-	elseif (data:sub(1,1) == "#" and data:len() == 7) then
-		red = tonumber(data:sub(2,3), 16)
-                green = tonumber(data:sub(4,5), 16)
-                blue = tonumber(data:sub(6,7), 16)
-                colorBg=string.char(red, green, blue)
+	    elseif (data:sub(1,1) == "#" and data:len() == 7) then
+		  red = tonumber(data:sub(2,3), 16)
+          green = tonumber(data:sub(4,5), 16)
+          blue = tonumber(data:sub(6,7), 16)
+          colorBg=string.char(red, green, blue)
+          print("Updated BG: " .. tostring(red) .. "," .. tostring(green) .. "," .. tostring(blue) )
+          if (displayTime~= nil) then
+            displayTime()
+          end
         else
           if (tonumber(data) >= 0 and tonumber(data) <= 100) then
             briPercent=tonumber(data)
             m:publish(mqttPrefix .. "/clock", tostring(data), 0, 0)
+          else
+            print "Unknown MQTT command"
           end
         end
       end