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>

examples/python/rn2903.py

@@ -0,0 +1,129 @@
+#!/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())
+
+    # 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()