Google-talk enabled thermostat for remote (and local) control of a milli-volt heater.

Thermostat set-point can be adjusted from the touchscreen or by chatting with the thermostat over Google Talk.

Nice animated flames show when the heat is on. Low blue flames for the pilot light, large orange-red flames when the heat is on.

Runs on a Raspberry P Model B+ with a PiTFT display.

A BMP180 sensor is connected to the I2C port for measuring temperature.

A relay is connected to GPIO 7.

A USB WiFi module for connecting to the internet.

Base OS is the Adafruit-provided raspbian image with kernel module for PiTFT framebuffer support.

Uses PyQt for the UI, Adafruit BMP library for reading temperature, sleekxmpp for connecting to Google Talk servers, WiringPi for controlling the GPIO.

Setting the GPIO pin controlling the relay to output mode and setting logic 0/1 did not work for me. The relay always saw a logic 1 and closed. Instead, to get the relay to recognize logic 0 I had to set the GPIO pin to input mode. I probably could (should?) have solved this using a pull-down resistor, but this worked for me.

• Clean things up
• Put each class in it's own file