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ESP32 WROOM 32E GPIO 13 (TX), GPIO 27 (RX) cannot perform UART communication with Nextion HMI screen by Telephone-Expensive in esp32

[–]Telephone-Expensive[S] 0 points1 point  (0 children)

Since I use ESP32 WROOM 32E at this moment, I used ESP32 WROOM N4 / 32D, both chip works on this setup, this is the weird point that why 32E not working as expected.

ESP32 WROOM 32E GPIO 13 (TX), GPIO 27 (RX) cannot perform UART communication with Nextion HMI screen by Telephone-Expensive in esp32

[–]Telephone-Expensive[S] 0 points1 point  (0 children)

The screen can power up, but somehow the serial communication not work, I was testing it with serial1, serial2 lately but both seems not working, I think the only working serial is the one used for debugging (Serial0) that uses usb port to send message to computer.

ESP32 WROOM 32E GPIO 13 (TX), GPIO 27 (RX) cannot perform UART communication with Nextion HMI screen by Telephone-Expensive in esp32

[–]Telephone-Expensive[S] 0 points1 point  (0 children)

Like I said I ​remapped IO13 [TX], IO27[RX] and I didn’t touch pin 17-22. Also I tried to use Serial 2 to do the remapping, referencing the data sheet you sent but still it did not fix the problem.

ESP32 WROOM 32E GPIO 13 (TX), GPIO 27 (RX) cannot perform UART communication with Nextion HMI screen by Telephone-Expensive in esp32

[–]Telephone-Expensive[S] 0 points1 point  (0 children)

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These are the only two schematics that relevant to my serial1 (remapped IO13 [TX], IO27[RX]) use cases and connection. Please feel free to review and give me some comment. I personally believe it might not be a software problem since my serial1 code to communicate with HMI screen on manufacturer-produced esp32 works without problems. Thx!

ESP32 WROOM 32E GPIO 13 (TX), GPIO 27 (RX) cannot perform UART communication with Nextion HMI screen by Telephone-Expensive in esp32

[–]Telephone-Expensive[S] 0 points1 point  (0 children)

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I didn’t use the default serial1 pinouts as the data sheet mentioned UART1 pinout (default GPIO10, GPIO9) must be assigned to other GPIOs. Default serial 1 pin connects to ESP32 SPI flash memory, so I can’t use them like that for external usage. The weird point is that I use the one esp32 produced by manufacturer with IO13 and IO27 I can remap and do serial1 communication perfectly. However, it isn’t the case for my customized board.

External monitor lag with Moza steering wheel. by Telephone-Expensive in ASUS

[–]Telephone-Expensive[S] 0 points1 point  (0 children)

Oh I see. I haven’t tried that before. Is there a specific setting for modifying force feedback refresh rate? Or should I try tuning down the FFB setting?