ESP8266 Community Forum

- Mon Sep 25, 2017 4:40 am #70284 Hi folks, I need your experienced help!

I have 2 boards wired up to a breadboard.
A) Wemos esp8266-12F
B) Arduino pro micro mega32u4

Grounds are connected, Vcc-s are connected and A:RX is connected to B:TX.

A:RX/TX pins are -> Serial as these pins are fed to USB/SERIAL IC
B:RX/TX pins are -> Serial1 as atmega32u4 uses dedicated pins for USB and RX/TX is available on Serial1

Here is my code on A:

Code: Select allvoid setup() {
  Serial.begin(115200);
    while (!Serial) {
  }
}

byte rx_byte = 0;        // stores received byte

void loop() {
  Serial.println("hello world!");
  delay(100);
}


Here is my code on B:

Code: Select allvoid setup() {
  Serial.begin(115200);
  Serial1.begin(115200);
  while (!Serial) {  }
  while (!Serial1) {  }
}

byte inByte = 0x0;
byte str[50] = "";
byte *pstr;

void loop() {
  if (Serial1.available() > 0) {
    *pstr = Serial1.read();
    Serial.print((char) *pstr);
    Serial.println(pstr - str);
    pstr++;
  } else {
    *pstr = 0;
    pstr = str;
  }
}