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/c++/rn2903.cxx

@@ -0,0 +1,137 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2017 Intel Corporation.
+ *
+ * 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.
+ */
+
+#include <unistd.h>
+#include <iostream>
+#include <string>
+
+#include "rn2903.hpp"
+#include "upm_utilities.h"
+
+using namespace std;
+
+int main(int argc, char **argv)
+{
+//! [Interesting]
+
+    string defaultDev = "/dev/ttyUSB0";
+    if (argc > 1)
+        defaultDev = argv[1];
+
+    cout << "Using device: " << defaultDev << endl;
+
+    // Instantiate a RN2903 sensor on defaultDev at 57600 baud.
+    upm::RN2903 sensor = upm::RN2903(defaultDev,
+                                     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.
+    //
+    // upm::RN2903 sensor = upm::RN2903(0, RN2903_DEFAULT_BAUDRATE);
+
+    // enable debugging
+    // sensor.setDebug(true);
+
+    // get version
+    if (sensor.command("sys get ver"))
+    {
+        cout << "Failed to retrieve device version string" << endl;
+        return 1;
+    }
+    cout << "Firmware version: " << sensor.getResponse() << endl;
+
+    cout << "Hardware EUI: " << sensor.getHardwareEUI() << endl;
+
+    // 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");
+    //
+    // RN2903_JOIN_STATUS_T rv = sensor.join(RN2903_JOIN_TYPE_OTAA);
+    // A successful join will return RN2903_JOIN_STATUS_ACCEPTED (0).
+    // cout << "JOIN: got rv " << int(rv) << endl;
+
+    // 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");
+
+    RN2903_JOIN_STATUS_T rv = sensor.join(RN2903_JOIN_TYPE_ABP);
+    if (rv == RN2903_JOIN_STATUS_ACCEPTED)
+    {
+        cout << "Join successful." << endl;
+
+        // 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.
+        string faketemp = "25.6";
+        cout << "Transmitting a packet..." << endl;
+
+        RN2903_MAC_TX_STATUS_T trv;
+        trv = sensor.macTx(RN2903_MAC_MSG_TYPE_UNCONFIRMED,
+                           1, // port number
+                           sensor.toHex(faketemp));
+
+        if (trv == RN2903_MAC_TX_STATUS_TX_OK)
+            cout << "Transmit successful." << endl;
+        else
+        {
+            // check to see if we got a downlink packet
+            if (trv == RN2903_MAC_TX_STATUS_RX_RECEIVED)
+            {
+                cout << "Transmit successful, downlink packet received: "
+                     << sensor.getResponse();
+            }
+            else
+            {
+                cout << "Transmit failed with code " << int(trv) << endl;
+            }
+        }
+    }
+    else
+    {
+        cout << "Join failed with code " << int(rv) << endl;
+    }
+
+    cout << "Exiting" << endl;
+
+//! [Interesting]
+
+    return 0;
+}