Strange issue with Serial2

[viktor1970]

Hardware:

Board: DOIT DevKit V1 Core Installation/update date: 20/sep/2017 IDE name: Arduino IDE Flash Frequency: 80Mhz Upload Speed: 921600

Description:

Hallo, I've a strange issue with Serial2: there's a lot of garbage sent. Here's the screenshot

On 1st loop the data (Nextion display codes) are sent correctly ("n1.val=5" and "dim=99", both with 3 0xFF as terminator); starting from second loop there's only garbage (exceps when val=17, but there's garbage too).

Then I made only this change: HardwareSerial Seriale(1); Leaving same pins and (of course) same code, and it works perfectly.

There's some issue with Serial2?

Best regards

Sketch:

#include <Wire.h>
#include <Nextion.h>

HardwareSerial Seriale(2);
Nextion nex(Seriale, true);

unsigned long tm1,tm2=5;;
char bf[20];

void setup() {
  Seriale.begin(38400,SERIAL_8N1,26,27);
  Serial.begin(115200);
  tm1=millis();
}

void loop() {
 if((millis()-tm1)>2000)
 {
  Serial.printf("num: %d",tm2);
  sprintf(bf,"n1.val=%d",tm2++);
  nex.sendCommand(bf);
  if(tm2%2) Seriale.print("dim=2"); else Seriale.print("dim=99");
  Seriale.write(0xFF);
  Seriale.write(0xFF);
  Seriale.write(0xFF);
  tm1=millis();
 }
}```

### Debug Messages:

No crashes

[me-no-dev]

There is... it's not quite clear to me what, but I am about to change the UART driver so it should get better

[me-no-dev]

Please pull the latest changes and report :) Thanks!

[viktor1970]

Hallo, I installed the lastest changes but nothing changed: This is what happens when using Serial(1): The correct data "n1.val=5" plus 3 0xFF are sent and 01 FF FF FF code received.

When using Serial(2):

Only garbage data on TX, nothing on RX. I tried to use native pins too, same result

Now I'll try with another ESP32 board.

Regards

[viktor1970]

I tried another ESP32, both with native and other pins. No changes.

Regards

[everslick]

@viktor1970 Is this issue still unresolved for you? Can we close this?

[EUNGJU-S]

Hello, @everslick I have same problem. Is this issue resolved ? When I using Hardware Serial (2) sometimes It does not works correctly. And I just changed Serial (2) to Serial (1) It is fine. But I hope using more Serial port on ESP32 stably.

[kolive360]

I try whit the Serial1 and work, but is fool

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This stale issue has been automatically closed. Thank you for your contributions.