BalkonController

ESP8266 Irrigation control with 4 + 1 valves, a pump and as bonus RGB/White LED-Strip

This is work in progress and there is no release yet! However, it already works fine for me.

Software

Build with platformio. platformio.ini contains dependencies to necessary libs, except Homie.
- Configured to use with Eclipse
- On command line
This requires the latest GIT version of Homie (2.0 development) to be installed in lib/ subdirectory. To avoid mixing git version of BalkonController and Homie, I propose to install Homie in another direcory and just symlink this into lib/.

Able to switch valves and main pump and/or main valve over MQTT according to Homie Convention using a PFC8574 I/O extension.
Automatic mode (Proof of concept, under development) using the Automaton framework
OpenHAB integration possible.
4 PWM outputs, configured for RGB led strip + white led strip.
Support for BMP180 pressure and temperature sensor
Logging over MQTT (Thanks to the new AsyncMQTT library for ESP)

I2C-Bus on PINs 4/5
BMP180 and PCF8574 connected to I2C
ULN2803 (for LED PWM) connected to GPIO 12, 13, 14, 16
Other 4 inputs of ULN2803 connected to Pin 3,4,5,6 of PCF8574
Relais input (optocoppler) connected to Pin 1 & 2 of PCF8574
COM of PCF8574 connected to 12V supply
1N4001 connected from each NO output of Relais to GND (Cathode at NO) (Freewheel diode - absolute mandatory!)
- ESP8266 is extremely sensitive to distortions on power supply (VCC / GND). Without the diodes I experienced resets even when switching on the relays and even with seperated 12V power supply for the relais.

TO DO! (works for me, but not yet published. To be documented here or in the Wiki.)