upm/examples/python/rn2903-p2p-rx.py
Jon Trulson 21a1860ec2 rn2903: Initial implementation; C; C++ wraps C; examples
This requires a new MRAA with UART sendbreak support.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
2017-05-09 13:44:12 -06:00

109 lines
3.7 KiB
Python
Executable File

#!/usr/bin/python
# Author: Jon Trulson <jtrulson@ics.com>
# Copyright (c) 2017 Intel Corporation.
#
# The MIT License
#
# 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 __future__ import print_function
import time, sys, signal, atexit
from upm import pyupm_rn2903 as sensorObj
def main():
## Exit handlers ##
# This function stops python from printing a stacktrace when you
# hit control-C
def SIGINTHandler(signum, frame):
raise SystemExit
# This function lets you run code on exit
def exitHandler():
print("Exiting")
sys.exit(0)
# Register exit handlers
atexit.register(exitHandler)
signal.signal(signal.SIGINT, SIGINTHandler)
defaultDev = "/dev/ttyUSB0"
if (len(sys.argv) > 1):
defaultDev = sys.argv[1]
print("Using device", defaultDev)
# Instantiate a RN2903 sensor on defaultDev at 57600 baud.
sensor = sensorObj.RN2903(defaultDev,
sensorObj.RN2903_DEFAULT_BAUDRATE)
# To use an internal UART understood by MRAA, use the following
# to inititialize rather than the above, which by default uses a
# tty path.
#
# sensor = sensorObj.RN2903(0,
# sensorObj.RN2903_DEFAULT_BAUDRATE)
# enable debugging
# sensor.setDebug(True)
# get version
if (sensor.command("sys get ver")):
print("Failed to retrieve device version string")
sys.exit(1)
print("Firmware version: " + sensor.getResponse())
print("Hardware EUI: " + sensor.getHardwareEUI())
# For this example, we will just try to receive a packet
# transmitted by the p2p-tx rn2903 example. We reset the
# device to defaults, and we do not make any adjustments to the
# radio configuration. You will probably want to do so for a
# real life application.
# The first thing to do is to suspend the LoRaWAN stack on the device.
sensor.macPause();
# We will use continuous mode (window_size 0), though the default
# radio watch dog timer will expire every 15 seconds. We will
# just loop here.
while (True):
print("Waiting for packet...")
rv = sensor.radioRx(0);
if (rv):
print("radioRx() failed with code " + str(rv))
else:
resp = sensor.getResponse();
payload = sensor.getRadioRxPayload();
if (not len(payload)):
print("Got response: '", end='')
print(resp, end="")
print("'")
else:
print("Got payload: '", end='')
print(sensor.fromHex(payload), end='')
print("'")
print()
if __name__ == '__main__':
main()