You mean using GPIO pins, as GPIO pin numbering is different than board's actual pin numbers? Thanks.


GPIO9 and GPIO10 do not work with UART1 because they are internally connected to flash. You can other pins.


Okay! let me try with using Pin 34 for RXD-0 35 for TXD-0 27 for RXD-2 28 ...

I use Pin 34 for RXD-0 35 for TXD-0 27 for RXD-2 28 for TXD-2

Works fine
Have you seen this?


You mean using GPIO pins, as GPIO pin numbering is different than board's actual pin numbers? Thanks.


GPIO9 and GPIO10 do not work with UART1 because they are internally connected to flash. You ...

I use Pin 34 for RXD-0 35 for TXD-0 27 for RXD-2 28 for TXD-2

Works fine
Have you seen this?

You mean using GPIO pins, as GPIO pin numbering is different than board's actual pin numbers? Thanks.

#include <HardwareSerial.h>

HardwareSerial SerialPort(1); // use UART1

void setup()
{
SerialPort.begin(15200, SERIAL_8N1, 4, 2);
}


I have connected GPS module to UART1 GPIO9 and GPIO10 and tried to run the code for UART1 in the tutorial as you mentioned above and it switched-on the on ...

ESP32 dev kit.

Could you please let me know which pin numbers you have used for serial1/UART1 port on ESP32 dev kit? Thanks.

I have myself followed the same tutorial and used the HardwareSerial example in that tutorial and changed UART2 to UART1 in the example code, it worked fine for me.

Which esp32 board version it has worked for you? Thanks.

Default pins for UART1 (GPIO9 and GPIO10) do not work. Because they are internally connected to flash. You can use any other GPIO pins. You can check this tutorial: https://microcontrollerslab.com/esp32-uart-communication-pins-example/


Actually, I have already been gone through your provided ...

You can assign the serial ports to whatever pins you have available when you initialize.

Serial1.begin(115200, SERIAL_8N1, RX_1, TX_1);
Serial2.begin(9600, SERIAL_8N1, 21, 22);

https://github.com/espressif/arduino-esp32/tree/2.0.0-alpha1#esp32dev-board-pinmap


Hello, sorry i have already ...

Hello there, I am working out on ESP32 for one of my projects as it says that it has the advantage of direct access to use 3 hardware UART serial ports. But I found that it has only one hardware UART serial port which works actually only i.e RX 16, TX 17 and other 2 UART hardware serial ports not ...

GPS detected and fixed the problem. Thanks.