trying to read debug output of rock 3a using esp 32

[vamzi]

i am using arduino ide, my plan is to keep the eps32 connected to rock3a, and access the debug logs from the browser,

this is the code i have used to see if the esp32 is able to read data form rock 3a,
 

#define RXD2 16

#define TXD2 17


void setup() {

  // Note the format for setting a serial port is as follows: Serial2.begin(baud-rate, protocol, RX pin, TX pin);

  Serial.begin(115200);

  //Serial1.begin(9600, SERIAL_8N1, RXD2, TXD2);

  Serial2.begin(15000000, SERIAL_8N1, RXD2, TXD2);

  Serial.println("Serial Txd is on pin: "+String(TX));

  Serial.println("Serial Rxd is on pin: "+String(RX));

}


void loop() { //Choose Serial1 or Serial2 as required

  while (Serial2.available()) {

    Serial.print(char(Serial2.read()));

  }

}

 

on serial monitor i am getting the data but only able to see boxes you can see the same in the image attached

can esp32 read the serial debug uart messages?

what am i doing wrong?

my rock 3b keeps hanging after a while and i am unable to pinpoint the exact reason it hangs, so only trying to this

 

 

 

[ScottP]

You have too many zeros on the speed its 1500000 ie 1.5Mbps

[Alexei Shcherbakov]

Max theoretical esp32 chip UART speed is 5Mbps, but nobody can reach this speed - max "config speed" is 921600 and even on 460800 you can get garbage and data loss 😞

 

For RockPi you need 1.5Mbps. I don't know why Radxa need such speed, may be they think "fast is better"

 

I use BeagleBone single board computer for connecting to my RockPi3A (because HDMI not working in modern kernels), and it is working perfectly. BeagleBone has fastest UARTs avaliable in pocket size