upm/examples/python/rn2903.py

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#!/usr/bin/env 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())
# we can support two types of join, OTAA and ABP. Each requires
# that certain parameters be set first. We will only attempt ABP
# joining with this example since it's the only one that can
# succeed without actual configuration. In both cases, if you
# are actually attempting to join a real LoRaWAN network, you
# must change the parameters below to match the network you are
# attempting to join.
# For OTAA, you need to supply valid Device EUI, Application EUI,
# and Application key:
#
# sensor.setDeviceEUI("0011223344556677")
# sensor.setApplicationEUI("0011223344556677")
# sensor.setApplicationKey("01234567012345670123456701234567")
#
# rv = sensor.join(RN2903_JOIN_TYPE_OTAA)
# A successful join will return RN2903_JOIN_STATUS_ACCEPTED (0).
# Try an ABP join. Note, these parameters are made up. For a
# real network, you will want to use the correct values
# obviously. For an ABP join, you need to supply the Device
# Address, Network Session Key, and the Application Session Key.
sensor.setDeviceAddr("00112233")
sensor.setNetworkSessionKey("00112233001122330011223300112233")
sensor.setApplicationSessionKey("00112233001122330011223300112233")
rv = sensor.join(sensorObj.RN2903_JOIN_TYPE_ABP)
if (rv == sensorObj.RN2903_JOIN_STATUS_ACCEPTED):
print("Join successful.")
# All transmit payloads must be hex encoded strings, so
# pretend we have a temperature sensor that gave us a value
# of 25.6 C, and we want to transmit it.
faketemp = "25.6"
print("Transmitting a packet...")
trv = sensor.macTx(sensorObj.RN2903_MAC_MSG_TYPE_UNCONFIRMED,
1, # port number
sensor.toHex(faketemp))
if (trv == sensorObj.RN2903_MAC_TX_STATUS_TX_OK):
print("Transmit successful.")
else:
# check to see if we got a downlink packet
if (trv == sensor.Obj.RN2903_MAC_TX_STATUS_RX_RECEIVED):
print("Transmit successful, downlink packet received:", end=' ')
print(sensor.getResponse())
else:
print("Transmit failed with code " + str(trv))
else:
print("Join failed with code " + str(rv))
if __name__ == '__main__':
main()