# ESP Wordclock
## Setup

### Initial Setup
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>
cd os/
./flash.sh ttyUSB0
</pre>

Connect to the ESP via a terminal emulator like screen using a baud rate of 115200. Then format the filesystem and reboot the ESP with the following commands:
<pre>
file.format()
node.restart()
</pre>

Then disconnect the serial terminal and copy the required files to the microcontroller:
<pre>
./tools/initialFlash.sh /dev/ttyUSB0
</pre>

### Upgrade

Determine the IP address of your clock and execute the following script:
<pre>
./tools/remoteFlash.sh IP-Address
</pre>

## Hardware Setup
* GPIO2     LEDs
* GPIO0	    Bootloader (at start)
* GPIO0	    factory reset (long during operation)

## MQTT Interface
* **basetopic**/cmd/single
** ON                       Set brightness to 100%
** OFF                      Set brightness to 0%
** 0-100                    Set brightness to given value
** #rrggbb                  Bacground color is set to hex representation of red, green and blue
** 0-255,0-255,0-255        Background color is set to decimal representation of red, green an blue
* **basetopic**/cmd/telnet
** ignored                  Stop MQTT server and start telnetserver at port 23

## OpenHAB2
Tested MQTT with binding-mqtt 2.5.x
### Configuration
```
Thing mqtt:topic:wordclock "Wordclock" (mqtt:broker) @ "MQTT"  {
  Channels:
   Type dimmer : dim "Dimming" [ stateTopic="basetopic/brightness", commandTopic="basetopic/cmd/single" ]
   Type string : cmd "Command" [ commandTopic="basetopic/cmd/single" ]
   Type switch : active "Active" [ commandTopic="basetopic/cmd/single" ]
   Type colorRGB : background "Background" [ stateTopic="basetopic/background", commandTopic="basetopic/cmd/single", on="28,0,0", off="0,0,0" ]
}
```