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 <Wire.h> 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 <Wire.h> 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 <Wire.available()) { char c = Wire.read(); Serial.print(c); } Serial.println(); } void requestEvent() { Wire.write("Hello NodeMCU"); }