NodeMCU UART Snippet

nodemcu.cpp

#include <SoftwareSerial.h>

SoftwareSerial mySerial(5, 4); // RX, TX

void setup() {
  // put your setup code here, to run once:
  Serial.begin(38400, SERIAL_8N1);
  mySerial.begin(38400);
  Serial.println("[NODE] Started");
//  String mySerialStart = "[STM] Node is now connected to STM!\r\n";
//  for(int i = 0; i < mySerialStart.length(); i++){
//    mySerial.write(mySerialStart[i]);
//  }
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial.available()){
    String buffer = Serial.readString();
    String log = "[NODE] " + buffer;
    Serial.println(log);
    for(int i = 0; i < buffer.length(); i++){
      mySerial.write(buffer[i]);
    }
  }
  if(mySerial.available()){
    char buffer2[32];
//    for(uint64_t time = millis(); time + 10000 > millis();){
//      buffer2 += (char) mySerial.read();
//      yield();
//    }
    mySerial.readBytes(buffer2, sizeof(buffer2)); 
    Serial.print("[STM] ");
    Serial.print(buffer2);
  }
}