NodeMCU与arduino Nano通过I2C通信

NodeMCU与arduino Nano通过I2C通信

接线方式

NodeMCU做主机程序如下：

#include 

void setup() {
Serial.begin(9600);
Wire.begin(D1, D2);
}

void loop() {
Wire.beginTransmission(8); 
Wire.write("Hello Arduino"); 
Wire.endTransmission(); 

Wire.requestFrom(8, 13); 
while(Wire.available()){
    char c = Wire.read();
  Serial.print(c);
}
Serial.println();
delay(1000);
}

arduino Nano作为从机

#include 

void setup() {
Wire.begin(8);
Wire.onReceive(receiveEvent); 
Wire.onRequest(requestEvent); 
Serial.begin(9600);       
}

void loop() {
delay(100);
}

// function that executes whenever data is received from master
void receiveEvent(inthowMany) {
while (0