5" esp32 display UART to/from Arduino

SM0PYH

Hi I have a project using UART to get data from an arduino board. But the diplay get so busy so the touch stop working. i recseive every 500ms. Is this normal or have i set something up wrong.

//Hans

Serial2.begin(115200, SERIAL_8N1, 43, 44); // Initiera UART2 för kommunikation med Arduino Mega.

  if (Serial2.available() > 0) {

    // Läs inkommande data från UART2 (RX: IO44, TX: IO43).

    String data = Serial2.readStringUntil('\n');

    String data = Serial2.readStringUntil('\n')

    // Analysera strängen för att få variablerna

    float voltage_value = getValue(data, 'V');

    float current_value = getValue(data, 'I');

    float forward_power_value = getValue(data, 'FP');

    float reverse_power_value = getValue(data, 'RP');

    float temperature_value = getValue(data, 'T');

    float VA = getValue(data, 'VA');

    float efficency = getValue(data, 'Eff');

    float SWR = getValue(data, 'SWR');

Elecrow

Hello @SM0PYH

Have you connected the GND of the esp32 uart port to the GND of the arduino?

Is there any error message?

SM0PYH

Hi

Yes it is connected and no errors.

I send data from the arduino.

If i sent with 5s interval it works "OK" but thats is far to slow for my purpose.

I am using the USB connection to my coputer at the same time to see whats happening, could that influence?

SM0PYH

Hi it was a misstake by me in my code :-( sorry....

The call for reading did happend without any delay at all. seems to work now. i will do some more testing

SM0PYH

Still not get it to work.

Should the settings for UART be set like this? ( I am still trying to get data from an Arduino)

Serial1.begin(115200, SERIAL_8N1, 43, 44); // Initiera UART2 för kommunikation med Arduino Mega.

Then serial monitor via USB is also not possible?