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96 lines
2.5 KiB
JavaScript
96 lines
2.5 KiB
JavaScript
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2017 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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var sensorObj = require('jsupm_rn2903');
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var defaultDev = "/dev/ttyUSB0";
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// if an argument was specified, use it as the device instead
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if (process.argv.length > 2)
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{
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defaultDev = process.argv[2];
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}
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console.log("Using device:", defaultDev);
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// Instantiate a RN2903 sensor on defaultDev at 57600 baud.
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var sensor = new sensorObj.RN2903(defaultDev,
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sensorObj.RN2903_DEFAULT_BAUDRATE);
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// To use an internal UART understood by MRAA, use the following
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// to inititialize rather than the above, which by default uses a
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// tty path.
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//
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// var sensor = new sensorObj.RN2903(0,
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// sensorObj.RN2903_DEFAULT_BAUDRATE);
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// enable debugging
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// sensor.setDebug(true);
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// get version
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if (sensor.command("sys get ver"))
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{
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console.log("Failed to retrieve device version string");
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process.exit(1);
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}
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console.log("Firmware version: " + sensor.getResponse());
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console.log("Hardware EUI: " + sensor.getHardwareEUI());
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// For this example, we will just try transmitting a packet over
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// LoRa. We reset the device to defaults, and we do not make any
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// adjustments to the radio configuration. You will probably want
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// to do so for a real life application.
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// The first thing to do is to suspend the LoRaWAN stack on the device.
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sensor.macPause();
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// the default radio watchdog timer is set for 15 seconds, so we
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// will send a packet every 10 seconds. In reality, local
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// restrictions limit the amount of time on the air, so in a real
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// implementation, you would not want to send packets that
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// frequently.
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var count = 0;
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function transmit()
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{
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var output = "Ping " + count;
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count++;
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// All payloads must be hex encoded
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var payload = sensor.toHex(output);
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console.log("Transmitting a packet, data: '"
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+ output
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+ "' -> hex: '"
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+ payload
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+ "'");
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var rv = sensor.radioTx(payload);
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if (rv == sensorObj.RN2903_RESPONSE_OK)
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console.log("Transmit successful.");
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else
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console.log("Transmit failed with code " + rv);
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console.log();
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}
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setInterval(transmit, 10000);
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process.on('SIGINT', function() {
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sensor = null;
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sensorObj.cleanUp();
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sensorObj = null;
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console.log("Exiting...");
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process.exit(0);
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});
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