index.js
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const MUTEX_COMMAND = 'COMMAND';
exports.MUTEX_COMMAND = MUTEX_COMMAND;
const MUTEX_SUBCOMMAND = 'SUBCOMMAND';
exports.MUTEX_SUBCOMMAND = MUTEX_SUBCOMMAND;
const pdu = require('node-pdu');
const ParserReadline = require('@serialport/parser-readline');
const ParserRegex = require('@serialport/parser-regex');
const logger = require('komodo-sdk/logger');
const mutex = require('../mutex-common');
const parsers = require('../serialport-parsers');
const modemInfo = require('../modem-info');
let port;
function writeToPort(data) {
return new Promise((resolve) => {
modemInfo.lastWriteTs = new Date();
port.write(data, (err, bytesWritten) => {
if (err) logger.warn(`ERROR: ${err.toString()}`);
logger.verbose('OUTGOING', { data: data.toString(), bytesWritten, err });
resolve(bytesWritten);
});
});
}
exports.writeToPortAndWaitForReadline = function writeToPortAndWaitForReadline(cmd, lockName) {
let resolved = false;
return new Promise(async (resolve) => {
const parser = new ParserReadline({ delimiter: parsers.PARSER_READLINE_DELIMITER });
parser.on('data', (data) => {
port.unpipe(parser);
mutex.unlock(lockName || MUTEX_COMMAND, cmd.trim());
if (!resolved) {
resolved = true;
resolve(data);
}
});
await mutex.lock(lockName || MUTEX_COMMAND, cmd.trim());
port.pipe(parser);
await writeToPort(cmd);
});
};
exports.writeToPortAndWaitForOkOrError = function writeToPortAndWaitForOkOrError(cmd, lockName) {
return new Promise(async (resolve) => {
const parser = new ParserRegex({ regex: /(?:OK|ERROR)\r\n/ });
parser.on('data', (data) => {
port.unpipe(parser);
mutex.unlock(lockName || MUTEX_COMMAND, cmd.trim());
resolve(data);
});
await mutex.lock(lockName || MUTEX_COMMAND, cmd.trim());
port.pipe(parser);
await writeToPort(cmd);
});
};
exports.sleep = function sleep(ms) {
return new Promise((resolve) => {
setTimeout(() => {
resolve();
}, ms || 0);
});
};
exports.setPort = function setPort(val) {
port = val;
};
exports.querySignalQuality = function querySignalQuality() {
return new Promise(async (resolve) => {
if (!mutex.tryLock(MUTEX_COMMAND, 'querySignalQuality')) {
resolve(false);
return;
}
await writeToPort('AT+CSQ\r');
mutex.unlock(MUTEX_COMMAND, 'querySignalQuality');
resolve(true);
});
};
exports.queryCOPS = function queryCOPS(lockName) {
return new Promise(async (resolve) => {
await mutex.lock(lockName || MUTEX_COMMAND, 'queryCOPS');
await writeToPort('AT+COPS?\r');
mutex.unlock(lockName || MUTEX_COMMAND, 'queryCOPS');
resolve(true);
});
};
exports.queryCOPSAndSignalQuality = function queryCOPSAndSignalQuality(skipOnLocked) {
return new Promise(async (resolve) => {
if (!skipOnLocked) {
await mutex.lock(MUTEX_COMMAND);
} else if (!mutex.tryLock(MUTEX_COMMAND, 'queryCOPSAndSignalQuality')) {
resolve(false);
return;
}
await this.writeToPortAndWaitForOkOrError('AT+COPS?\r', MUTEX_SUBCOMMAND);
await this.writeToPortAndWaitForOkOrError('AT+CSQ\r', MUTEX_SUBCOMMAND);
mutex.unlock(MUTEX_COMMAND, 'queryCopsAndSignalQuality');
resolve(true);
});
};
exports.queryIMEI = function queryIMEI(lockName) {
return new Promise(async (resolve) => {
const parser = new ParserRegex({ regex: parsers.PARSER_WAIT_FOR_OK_OR_ERROR_REGEX });
parser.on('data', (data) => {
logger.verbose('INCOMING', { data: data.toString(), parser: 'parserIMEI' });
port.unpipe(parser);
mutex.unlock(lockName || MUTEX_COMMAND, 'queryIMEI');
modemInfo.imei = data.toString().trim() || null;
logger.info('IMEI extracted', { imei: modemInfo.imei });
resolve(modemInfo.imei);
});
await mutex.lock(lockName || MUTEX_COMMAND, 'queryIMEI');
port.pipe(parser);
await writeToPort('AT+CGSN\r');
});
};
exports.queryIMSI = function queryIMSI(lockName) {
return new Promise(async (resolve) => {
const parser = new ParserRegex({ regex: parsers.PARSER_WAIT_FOR_OK_OR_ERROR_REGEX });
parser.on('data', (data) => {
logger.verbose('INCOMING', { data: data.toString(), parser: 'parserIMSI' });
port.unpipe(parser);
mutex.unlock(lockName || MUTEX_COMMAND, 'queryIMSI');
modemInfo.imsi = data.toString().trim() || null;
logger.info('IMSI extracted', { imsi: modemInfo.imsi });
resolve(modemInfo.imsi);
});
await mutex.lock(lockName || MUTEX_COMMAND, 'queryIMSI');
port.pipe(parser);
await writeToPort('AT+CIMI\r');
});
};
exports.queryIMEIAndIMSI = async function queryIMEIAndIMSI() {
await mutex.lock(MUTEX_COMMAND, 'queryIMEIAndIMSI');
const imei = await this.queryIMEI(MUTEX_SUBCOMMAND);
const imsi = await this.queryIMSI(MUTEX_SUBCOMMAND);
await mutex.unlock(MUTEX_COMMAND, 'queryIMEIAndIMSI');
return { imei, imsi };
};
exports.queryManufacturer = function queryManufacturer(lockName) {
return new Promise(async (resolve) => {
const parser = new ParserRegex({ regex: parsers.PARSER_WAIT_FOR_OK_OR_ERROR_REGEX });
parser.on('data', (data) => {
logger.verbose('INCOMING', { data: data.toString(), parser: 'parserManufacturer' });
port.unpipe(parser);
mutex.unlock(lockName || MUTEX_COMMAND, 'parserManufacturer');
modemInfo.manufacturer = data.toString().trim() || null;
logger.info('Manufacturer extracted', { manufacturer: modemInfo.manufacturer });
resolve(modemInfo.manufacturer);
});
await mutex.lock(lockName || MUTEX_COMMAND, 'queryManufacturer');
port.pipe(parser);
await writeToPort('AT+CGMI\r');
});
};
exports.queryModel = function queryModel(lockName) {
return new Promise(async (resolve) => {
const parser = new ParserRegex({ regex: parsers.PARSER_WAIT_FOR_OK_OR_ERROR_REGEX });
parser.on('data', (data) => {
logger.verbose('INCOMING', { data: data.toString(), parser: 'parserModel' });
port.unpipe(parser);
mutex.unlock(lockName || MUTEX_COMMAND, 'parserModel');
modemInfo.model = data.toString().trim() || null;
logger.info('Model extracted', { model: modemInfo.model });
resolve(modemInfo.model);
});
await mutex.lock(lockName || MUTEX_COMMAND, 'queryModel');
port.pipe(parser);
await writeToPort('AT+CGMM\r');
});
};
exports.sendSMS = function sendSMS(destination, msg) {
return new Promise(async (resolve) => {
});
};
exports.initATCommands = async function initATCommands() {
await mutex.lock(MUTEX_COMMAND, 'INIT MODEM');
await this.writeToPortAndWaitForOkOrError('\rATE0\r', MUTEX_SUBCOMMAND);
await this.writeToPortAndWaitForOkOrError('AT+CMGF=0\r', MUTEX_SUBCOMMAND);
await this.writeToPortAndWaitForOkOrError('AT+CNMI=1,2,0,1,0\r', MUTEX_SUBCOMMAND);
mutex.unlock(MUTEX_COMMAND, 'INIT MODEM');
};