modem-commands.js
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const MUTEX_COMMAND = 'COMMAND';
// const MUTEX_SUBCOMMAND = 'SUBCOMMAND';
const logger = require('komodo-sdk/logger');
const mutex = require('./mutex-common');
// const parsers = require('./serialport-parsers');
let port;
function writeToPort(data) {
return new Promise((resolve) => {
port.write(data, (err, bytesWritten) => {
if (err) logger.warn(`ERROR: ${err.toString()}`);
logger.verbose('OUTGOING', { bytesWritten, data: data.toString() });
resolve(bytesWritten);
});
});
}
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 querySignalQuality() {
return new Promise(async (resolve) => {
await mutex.lock(MUTEX_COMMAND, 'queryCOPS');
await writeToPort('AT+COPS?\r');
mutex.unlock(MUTEX_COMMAND, 'queryCOPS');
resolve(true);
});
};