watch_power_and_cadence.py

#!/usr/bin/env python3
# MIT License

# Copyright (c) 2020 Jonathan Ludwig

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

from sensors.antnode import AntPlusNode


NETWORK_KEY= [0xb9, 0xa5, 0x21, 0xfb, 0xbd, 0x72, 0xc3, 0x45]


def print_power(watts, data):
    string = 'Power: %u [Watts]' % watts
    print(string)

def print_cadence(cadence, data):
    string = 'Cadence: %u [RPM]' % cadence
    print(string)


def main():
    node = AntPlusNode(NETWORK_KEY)
    
    try:
        power_meter = node.attach_power_meter()
        power_meter.on_power_data = print_power
        power_meter.on_cadence_data = print_cadence
        node.start()
    finally:
        node.stop()

if __name__ == "__main__":
    main()