This is a (little bit hacky) utility for sending "call for heat" ON and OFF messages to my Siemens RCR10/433 receiver boiler control relay. (Note: the codes have since been updated to a generic 433MHz thermostat)
NOTE: The ON and OFF packets herein are specific to my receiver: they probably contain some ID that was exchanged during the "learn" mode pairing between receiver and thermostat.
Currently configured to use WiringPi PIN 0 (GPIO 17) to transmit on (should be connected to DATA pin of a 433Mhz transmitter). GPIO pin 17 should be configured for export with gpio which will make changes to /sys/class/gpio.
gpio export 17 out
NOTE: the install script will setup an init script (debian-compatible) that exports GPIO 17 with direction=out.
callforheat 0 [offset] // Call for heat OFF
callforheat 1 [offset] // Call for heat ON
[offset] Microseconds to reduce pulse lengths by. Default: 90
also set via CALLFORHEAT_OFFSET environment variable.
To call for heat (turn boiler ON):
callforheat 1
To cancel call for heat (turn boiler OFF):
callforheat 0
To call for heat with realtime offset increased to 100us:
callforheat 1 100
sudo apt-get install wiringpi
To build a version with the transmit pin control stubbed:
make
To build for the Raspberry PI:
make PLATFORM=pi
To install on the Raspberry PI:
make install PLATFORM=pi
To uninstall
make uninstall PLATFORM=pi
A blog post I made in response to a question about this project: