Control your ceiling fans via MQTT
:::CLIENT INFO:::
You must have mosquitto installed on the server running the fan-control code. sudo apt-get install mosquitto
Make sure python3 is installed.
Make pip3 is installed: sudo apt-get install python3-pip
Make sure that gpiozero, rpi.gpio and paho-mqtt are installed via pip3 sudo pip3 install gpizero rpi.gpio paho-mqtt
To execute fan-control.py, run it:
/usr/bin/python3 fan-control.py
To start quietly in the backgroup, use:
nohup /usr/bin/python3 ./fan-control.py &
Also, to have the script run at boot, I created a System Service. See fancontrol.service
Add file to /etc/systemd/system/ directory
Then run sudo systemctl enable fancontrol.service
Currently having issues with not connecting to broker as service. Possibly due to the slowness of the raspberry pi 1. Need to investigate.
● fancontrol.service - Fan Control Python Script
Loaded: loaded (/etc/systemd/system/fancontrol.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2018-12-10 07:02:54 GMT; 50s ago
Process: 322 ExecStart=/usr/bin/python3 /home/pi/fan-control.py (code=exited, status=1/FAILURE)
Main PID: 322 (code=exited, status=1/FAILURE)
Dec 10 07:02:53 raspberrypi python3[322]: File "/home/pi/.local/lib/python3.5/site-packages/paho/mqtt/client.py", line 962, in reconnect
Dec 10 07:02:53 raspberrypi python3[322]: sock = socket.create_connection((self._host, self._port), source_address=(self._bind_address, 0))
Dec 10 07:02:53 raspberrypi python3[322]: File "/usr/lib/python3.5/socket.py", line 712, in create_connection
Dec 10 07:02:53 raspberrypi python3[322]: raise err
Dec 10 07:02:53 raspberrypi python3[322]: File "/usr/lib/python3.5/socket.py", line 703, in create_connection
Dec 10 07:02:53 raspberrypi python3[322]: sock.connect(sa)
Dec 10 07:02:53 raspberrypi python3[322]: OSError: [Errno 113] No route to host
Dec 10 07:02:54 raspberrypi systemd[1]: fancontrol.service: Main process exited, code=exited, status=1/FAILURE
Dec 10 07:02:54 raspberrypi systemd[1]: fancontrol.service: Unit entered failed state.
Dec 10 07:02:54 raspberrypi systemd[1]: fancontrol.service: Failed with result 'exit-code'.
If I manually run sudo systemctl start fancontrol.service it will load fine...
:::BROKER INFO:::
on the broker(the machine giving the orders), you must have mosquitto-clients installed sudo apt-get install mosquitto-clients
from broker, you can run this command to send signal/message to the pi running fan-control.py
mosquitto_pub -h 10.0.201.101 -t pizza -k 60 -m "living room fan low"
Don't forget firewall rules. TCP 1883
For systemd help, see these findings that helped me: https://raspberrypi.stackexchange.com/questions/84892/run-python-script-at-startup-with-systemd-service https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/sect-managing_services_with_systemd-unit_files https://unix.stackexchange.com/questions/126009/cause-a-script-to-execute-after-networking-has-started
It restart service on failure, looking into: https://singlebrook.com/2017/10/23/auto-restart-crashed-service-systemd/