step_by_step_guide

Download dependencies:
https://github.com/IanHarvey/bluepy

Check if bluetooth is working 
$ sudo python3 bt_getter.py

If not, then could be that BLE adapter on pi is not working. Try these debug commands:
$ systemctl status bluetooth
$ rfkill list 
$ bluetoothctl power on

Once python program is working, BLE timer and service can be installed. 
$ chmod +x install.sh
$ sudo ./install.sh

Check if timer was properly installed
$ systemctl status ble_logger.service   # should print temperature readout