/* * Author: Jon Trulson * Copyright (c) 2017 Intel Corporation. * * The MIT License * * This program and the accompanying materials are made available under the * terms of the The MIT License which is available at * https://opensource.org/licenses/MIT. * * SPDX-License-Identifier: MIT */ import upm_rn2903.*; public class RN2903_P2P_TX_Example { private static String defaultDev = "/dev/ttyUSB0"; public static void main(String[] args) throws InterruptedException { // ! [Interesting] if (args.length > 0) defaultDev = args[0]; System.out.println("Using device " + defaultDev); // Instantiate a RN2903 sensor on defaultDev at 57600 baud. RN2903 sensor = new RN2903(defaultDev, javaupm_rn2903.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. // // RN2903 sensor = new RN2903(defaultDev, // upm_rn2903.javaupm_rn2903.RN2903_DEFAULT_BAUDRATE); // enable debugging // sensor.setDebug(true); // get version if (sensor.command("sys get ver") != RN2903_RESPONSE_T.RN2903_RESPONSE_OK) { System.out.println("Failed to retrieve device version string"); System.exit(1); } System.out.println("Firmware version: " + sensor.getResponse()); System.out.println("Hardware EUI: " + sensor.getHardwareEUI()); // For this example, we will just try transmitting a packet over // LoRa. 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(); // the default radio watchdog timer is set for 15 seconds, so we // will send a packet every 10 seconds. In reality, local // restrictions limit the amount of time on the air, so in a real // implementation, you would not want to send packets that // frequently. Integer count = 0; while (true) { String output = "Ping " + count.toString(); count++; // All payloads must be hex encoded String payload = sensor.toHex(output); System.out.println("Transmitting a packet, data: '" + output + "' -> hex: '" + payload + "'"); RN2903_RESPONSE_T rv = sensor.radioTx(payload); if (rv == RN2903_RESPONSE_T.RN2903_RESPONSE_OK) System.out.println("Transmit successful."); else System.out.println("Transmit failed with code " + rv.toString()); System.out.println(); Thread.sleep(10000); } // ! [Interesting] } }