reading data from stm32 on esp8266

Jakub Beling 0
Viewed 39

im sending via uart data from stm32 like this:

sprintf(buffer, "%d %d %d %d %d %d %d %d %d %d %d %f;", (int32_t)ir_average, (int32_t)red_average, (int32_t)dcFilterIRresult, (int32_t)dcFilterRedresult, (int32_t)chebyshevResult2, (int32_t)elipticResult2, (int32_t)wyjscie, (int32_t)bpm_up, (int32_t)fftbmp, (int32_t)currentSaO2Value, (int32_t)spo2Calib, temp); 
HAL_UART_Transmit(&huart4, buffer, 100, 1000);

how should i read it from esp8266 side in arduino ide? maybe i should do it differently? i wanted to send a packet od data and split it after reading full packet on esp8266

arduino-esp8266 uart c
2 Answers

Generally in arduino you read using Serial.read() which returns char. Form a string out of it.

    String resp;
    char   _char;
    while(Serial.available()){
        _char =  Serial.read();
        resp += _char;
    }

to convert it to int use .toInt()

to separate individual numbers use .indexOf

pdnr70

To read bytes from the UART in arduino IDE: Serial.read() (in a loop) or Serial.ReadString().

Generally speaking, prefer using snprintf to sprintf to avoid buffer overflows.

Stako Verfleaux0
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