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99 lines
2.6 KiB
JavaScript
99 lines
2.6 KiB
JavaScript
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 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_gprs');
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/************** Functions **************/
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function printUsage(progname)
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{
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var outputStr = "Usage: " + progname + " [AT command]\n\n" +
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"If an argument is supplied on the command line, that argument is\n" +
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"sent to the module and the response is printed out.\n\n" +
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"If no argument is used, then the manufacturer and the current\n" +
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"saved profiles are queried and the results printed out.\n\n"
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console.log(outputStr);
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}
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// simple helper function to send a command and wait for a response
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function sendCommand(sensor, cmd, callback)
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{
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// commands need to be terminated with a carriage return
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cmd += "\r";
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sensor.writeDataStr(cmd);
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// wait up to 1 second
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if (sensor.dataAvailable(1000))
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{
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console.log("Returned: " + sensor.readDataStr(1024));
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}
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else
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console.log("Timed out waiting for response");
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if (callback)
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callback();
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}
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/************** Main code **************/
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// Instantiate a GPRS Module on UART 0
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var sensor = new sensorObj.GPRS(0);
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// Set the baud rate, 19200 baud is the default.
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if (sensor.setBaudRate(19200))
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{
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console.log("Failed to set baud rate");
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process.exit(0);
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}
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printUsage(process.argv[1]);
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// Note: in nodeJS, command-line argument 0 is "node".
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// Command-line argument 1 is "gprs.js"
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// If you have a third argument, then it's a command
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if (process.argv.length > 2)
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{
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console.log("Sending command line argument (" + process.argv[2] + ")...");
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sendCommand(sensor, process.argv[2]);
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}
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else
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{
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// sending this command as a synchronous callback ensures better timing
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var callbackFunc = function()
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{
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setTimeout(function()
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{
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// query the saved profiles
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console.log("Querying the saved profiles (AT&V)...");
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sendCommand(sensor, "AT&V");
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// A comprehensive list is available from the
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// datasheet at:
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// http://www.seeedstudio.com/wiki/images/7/72/AT_Commands_v1.11.pdf
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}, 1000);
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};
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// query the module manufacturer
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console.log("Querying module manufacturer (AT+CGMI)...");
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sendCommand(sensor, "AT+CGMI", callbackFunc);
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}
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/************** Exit code **************/
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process.on('SIGINT', function()
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{
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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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