If you do not know the address of your HR Monitor, put your device into broadcast mode and run the following command to list all BLE devices in range.
python discover.py
Once you've found your address it should look something like D2:82:35:C1:K5:34. Run the following command replacing {ADDR} with the address copied in the previous step.
# Display only mode
python watch.py -d {ADDR}
# Write to file
python watch.py -d {ADDR} --file --file_path /tmp/hr.csv
You can list out all C 4C46 haracteristics/Descriptors/Services for the device with the following command.
python discover.py -d {ADDR}