Python script to read sensor values over BLE from Viatom wearable ring oxygen (SpO2) monitors.
Reads values once every 2 second and logs to console or log file. Also publishes values to an MQTT broker if so configured.
Tested against a Viatom model PO3 (Wellue KidsO2) during development.
Should be compatible with all Viatom ring oxygen monitors inluding models PO1, PO2 (Wellue O2Ring), PO3, PO4 and PO1B.
Install BluePy for BLE and Paho for MQTT client
sudo pip install bluepy
sudo pip install paho-mqtt
Scan while wearing the device to determine it's BLE address.
Note: Ensure the device is not connected to any other monitor (ie the mobile app) before scanning.
sudo python viatom-ble.py -s
Look for a device with Complete Local Name that is associated with the ring monitor device and note its Device address (six colon-delimited octets, eg aa:bb:cc:11:22:33)
Edit the python script viatom-ble.py and enter the BLE address where the ble_address variable is initialized.
Optionally also configure the MQTT client by enering values for the mqtt_* variables where they are initialized.
Test BLE connectivity while wearing the device.
Note: Warnings and exceptions from the MQTT client can be ignored if it has not been configured.
python viatom-ble.py -v -c
Edit the service definition file viatom-ble.service and update the command in ExecStart to reflect the correct path to the python script.
Install the service definition file:
sudo cp viatom-ble.service /lib/systemd/system/.
sudo systemctl daemon-reload
To start the service:
sudo systemctl start viatom-ble
To automatically start the service on boot:
sudo systemctl enable viatom-ble
Make the python script compatible with including as a module in other scripts.