Multiple buttons on 2 pins

[arekf]

Hi. I have a controller with 18 buttons and two UART pins: TX0 and RX1. I'm trying to connect it to an Arduino Leonardo. I'm having no luck. I'm new to Arduino. I previously connected two buttons to two pins using ChatGPT, and it worked. Please help. I don't know how to read the signals the button is sending.

[xfpd]

Show the button controller information.

[arekf]

I don't really have anything except the photo I can take :/ The board also has a Bluetooth modem, which was used for configuration.

[PaulRB]

Connect your controller's Tx pin to the Leonardo's Rx pin (it's ok to use that pin on Leonardo boards).

Then try something like this

void setup() {
  Serial.begin(115200);
  Serial1.begin(9600);
}

void loop() {
  while (Serial1.available()) {
    Serial.write(Serial1.read());
  }
}

Set serial monitor to 115200 baud and see if you get anything when you press the controller buttons. If not, try baud rates other than 9600 for Serial1.begin().

[Deva_Rishi]

Well that is not the correct rate

@arekf

I previously connected two buttons to two pins using ChatGPT, and it worked.

And what was the method used in that case ?