Duplicate data received in all opened ports

[alessandroraffa]

Thanks for the useful library.
We found an unexpected behaviour of the library in our implementation.
We forked your library and commit a few changes in order to make it work with our setup.
Hope this helps other users too.

Hardware setup

We have an Odroid M1 single board computer with 2 uart ports (uart0 and uart1) enabled on the DTB Overlay configuration.
In the uart pins of the GPIO slot we connected 2 ESP32 boards that periodically send different data.

Current behaviour

We opened both ports and added two separate data listeners:

import SerialPortAPI from 'react-native-serial-port-api';

const port0 = await SerialPortAPI.open('/dev/ttyS0', { baudRate: 115200 });
port0.onReceived((buffer: Buffer) => {
  console.log('/dev/ttyS0', Array.from(buffer));
});

const port1 = await SerialPortAPI.open('/dev/ttyS1', { baudRate: 115200 });
port1.onReceived((buffer: Buffer) => {
  console.log('/dev/ttyS1', Array.from(buffer));
});

The above code produces the following logs:

/dev/ttyS0 [51, 51, 51, 51, 52, 53, 54, 55, 56, 57] # actual data from S0 device
/dev/ttyS1 [51, 51, 51, 51, 52, 53, 54, 55, 56, 57] # data from S0 device, but received in S1
/dev/ttyS0 [48, 49, 50, 51, 52, 53, 54, 55, 56, 57] # data from S1 device, but received in S0
/dev/ttyS1 [48, 49, 50, 51, 52, 53, 54, 55, 56, 57] # actual data from S1 device

The above code and logs show that if we open 2 serial ports and both devices sends data, we receive duplicate data in both ports.

Proposed changes

We forked your library here @infobiotech/react-native-serial-port-api

Here is our commit infobiotech@df9bdb5

With the above changes, the code produces the following logs:

/dev/ttyS0 [51, 51, 51, 51, 52, 53, 54, 55, 56, 57] # actual data from S0 device
/dev/ttyS1 [48, 49, 50, 51, 52, 53, 54, 55, 56, 57] # actual data from S1 device

[bastengao]

Right, it has this issue actually.

[Ranjit8298]

Hii @alessandroraffa, Could I get the repo link of your project?

[bastengao]

Fixed in v1.4.0-rc.2

[alessandroraffa]

Hii @alessandroraffa, Could I get the repo link of your project?

Sorry @Ranjit8298, but it's a private repo for an internal project.