Hi guys
I have been trying to set serial communication between NodeMCU ESP8266 and Arduino Mega 2560(clone).
I found out how to do that on this website: Serial Communication between NodeMCU and Arduino - Arduino Project Hub.
But i wanted it in reverse so ESP will send something to arduino and when arduino will receive something, it puts that into some variable and then for example turn on a led.
But I have one trouble. I cannot convert received text from serial into any variable cause it only displays 1 or some wierd characters.
Can somebody help me with this?
Here is code for ESP8266:
void setup() {
Serial.begin(115200);
}
void loop() {
Serial.println('1');
delay(1000);
Serial.println('2');
delay(1000);
}
And here is Arduino code:
void setup(){
pinMode(13, OUTPUT);
Serial.begin(115200);
Serial1.begin(115200);
/*while (!Serial1) {
; // wait for serial port to connect. Needed for native USB port only
}*/
}
void loop()
{
if (Serial1.available()) {
Serial.write(Serial1.read());
int str = Serial1.read();
if(str==1){
digitalWrite(13, HIGH);
}
if(str==2){
digitalWrite(13, LOW);
}}
}
On arduino i have wires on RX1, TX1, PMW port 13 with ground and one ground is directly connected to ESP
On ESP i have only RX connected to TX1 and TX to RX1 and also that ground.
Thanks for any help 