节点js串行端口获取响应`ERROR`或`OK` sms调制解调器

Question

I am using Wavecom 8 port SMS Modem My problem is i want to check if there is an error (such as no load balance or no sim inserted) in writing AT commands then it will check another available ports to re send the SMS.

I want to capture only the ERROR or OK output

i used this function

function sendSync(port, src) {
  return new Promise((resolve, reject) => {
      port.write(src,(err)=>{
        if(err){
          reject(err)
        }
        port.drain()
      });
      port.once('data', (data) => {
        console.log('###############################',data.toString())
          resolve(data.toString());
      });

      port.once('error', (err) => {
        console.log('************************')
          reject(err);
      });
  });
}

Data Recieved from Port

Answer 1

I am now using serialport 5.0

I solve my problem by creating this function

function writeSync(serial,cmd){
  return new Promise(function(resolve,reject){
    serial.write(cmd)
    serial.drain()
    serial.once('data',(data)=>{
      var arr = data.toString()
      var str = arr.split(/\r?\n/);
      //console.log(str[1])
      resolve(str[1])
    })
  })
}