This is some code to run a bluetooth switchmate light switch. My use case is for an annoying front porch light that is not connected to a breaker so it can't simply be wired to a smart switch.

The code in switchmate.py is based on https://github.com/brianpeiris/switchmate. I refactored the code to be a python object. Also it no longer relies on sudo (at least on my raspberrypi). He licensed his MIT so I'm doing the same.

horizons_to_times.py uses pyephem to figure out when to turn on the light based on local sunrise and sunset. I mostly guessed at the horizon angles that made sense and put those values into conf.yaml-example

lightmachine.py uses apscheduler to flexibly schedule execution times. transitions manages the state machine that is a light switch. To be clear the states are "Light.ON", "Light.OFF", and "Light.UNKN".

Because Bt is annoying, every few minutes there has to be a check to verify the switch is in the right state. I could have been smarter about how this check worked but Bt is annoying and unreliable.

Some assumptions:

• raspberry pi configured with bluetooth
• raspberry pi time synced w/ ntpd or similiar
• raspberry pi timezone set to UTC
• switchmate mac addr set in conf.yaml python ./switchmate.py can be used to scan for nearby switchmate switches

$ virtualenv -p python3 virt 
$ source virt/bin/activate
$ pip install -r requirements.txt
$ cp conf.yaml-example conf.yaml
$ edit conf.yaml 
$ python ./lightmachine.py

At somepoint would like to put https://www.cleardarksky.com/c/USNOkey.html or api.weather.com data into this to turn a light on based on darkness in the sky.

--timball