Bluetooth LE temperature/humidity component for Home Assistant.
Skybeacons are cheap CR2477-powered ibeacon/eddystone sensors that come with temperature/sensor module. They are advertised to last 2+ years. More information: http://cnsky9.en.alibaba.com
The device(s) need to have password disabled:
- Run provided Skybeacon Android app
- Connect to the device
- Enter default password (was 888888) for me
- Click 'more'
- Click old password, type old password
- Set empty new password
- Click 'Save'
- Click 'Submit'
pip install -r requirements.txt
cp skybeacon.py /path/to/homeassistant/custom_components/sensor
Edit configuration.yaml and add:
sensor:
- platform: skybeacon
mac: 'F7:BE:12:02:47:31'
name: 'living room'
Subscribe to temperature/humidity notifications. Keep connection active.
It is possible to read temperature/humidity directly (as opposed to get notified of change) with 0xff92. However sometimes it just gets stale, but correct value is received by notification. So the code does not rely on reading the characteristic directly and merely waits for notifications to arrive.
Devices that are far away do not seem to be able transmit burst of data. Not sure if this is specific to Skybeacon or general BT issue. The sympthom is that connection gets due to timeout which seem to be originating from host controller. As result, when gatttool goes out to discover all characterstic, connection drops and reconnection is needed. Subsequent connection attemps keep on failing, so device can not be used at all. This is work-arounded by sneaking a UUID-handle mapping into pygatt, which is hacky. However the hack is effective and even faraway devices seem to able to maintain connection for many hours and deliver notifications.
Much of my knoweledge of skybeacon behavour comes from reverse-engineering. However I didn't figure out yet how password is supposed to work. As result only passwordless mode is supported.