No Response After Write

[elmbrent]

Hi,

I've setup your library correctly. and it seems to work great but I don't get back a response from the write

 presureStart() {
    EasyBluetooth.writeln('MEAS.PRES?')
    .then(() => {
      console.log("Response to come...")
    })
    .catch((ex) => {
      console.warn(ex);
    })
  }

I then wait for a response like in example with the listener and receive nothing from device.

  onDataRead(data) {
    console.log(data)
  }

I know the device does return data as I've built a similar app in node using bllue-serial-port which returns a message once I sent the write message.

  var util = require('util');
    var DeviceINQ = require("./lib/device-inquiry.js").DeviceINQ;
    var BluetoothSerialPort = require("./lib/bluetooth-serial-port.js").BluetoothSerialPort;
    var serial = new BluetoothSerialPort();

    serial.on('found', function (address, name) {
        console.log('Found: ' + address + ' with name ' + name);

        serial.findSerialPortChannel(address, function(channel) {
            console.log('Found RFCOMM channel for serial port on ' + name + ': ' + channel);

            console.log(name);

            if (name !== 'CPG1500-1A00ANKSMJ7') return;

            serial.connect(address, channel, function() {
                console.log('Connected. Sending data...');

                serial.on('data', function(buffer) {
                    console.log('got data: Presure (', buffer.toString('utf-8').substring(0, 9), ')');
                });

                setInterval(() => {
                    serial.write(Buffer.from('MEAS.PRES?'), (err, count) => {})
                }, 500)

            });
        });
    });

Any ideas why this is not working, I'm out of ideas.

Thanks, Brent

[douglasjunior]

Have you registered the listener?

componentWillMount() {
    this.onDataReadEvent = EasyBluetooth.addOnDataReadListener(this.onDataRead.bind(this));
}

[elmbrent]

Yes I have done this, nothing returned, thanks for fast reply I'm pulling my hair out lol

[douglasjunior]

What you setup in bufferSize and characterDelimiter.

The OnDataRead event is triggered when it founds the characterDelimiter in the received data, or when bufferSize is completed.

[elmbrent]

I think its actually the sending of data as I tried to remotely power down the device and got no result.

I used your example.

const config = {
  "uuid": "00001101-0000-1000-8000-00805f9b34fb",
  "deviceName": "Bluetooth Example Project",
  "bufferSize": 1024,
  "characterDelimiter": "\n"
}

[elmbrent]

Dont worry fixed! "characterDelimiter": "\r"

[douglasjunior]

Cool!

[elmbrent]

How much would it cost for you to write the IOS version of this?

[douglasjunior]

Please, contact me by email nassifrroma[ at ]gmail.com