ESP8266获取外设IIC地址 使用Arduino IDE，获取ESP8266外设IIC地址并打印输出到串口示例程序{lamp/}#include <Wire.h> void setup() { // 模拟I2C总线为GPIO0和GPIO2，初始化 Wire.begin(0,2); // 初始化调试串口波特率 Serial.begin(115200); } void loop() { byte error, address; int nDevices; // 串口输出调试信息 Serial.println("Scanning I2C Devices...."); nDevices = 0; for (address = 1; address < 127; address++ ) { // The i2c_scanner uses the return value of // the Write.endTransmisstion to see if // a device did acknowledge to the address. // 发送1次从机地址 Wire.beginTransmission(address); // 等待从机响应 error = Wire.endTransmission(); if (error == 0) { Serial.print("I2C device found at address 0x"); // 显示当前查询的从机地址 if (address < 16) { Serial.print("0"); } Serial.print(address, HEX); Serial.println(" !"); // 找到的从机数量自增 nDevices++; } else if (error == 4) { Serial.print("Unknow error at address 0x"); if (address < 16) Serial.print("0"); Serial.println(address, HEX); } } // 所有从机地址遍历完毕 if (nDevices == 0) Serial.println("No I2C devices found\n"); else Serial.println("done\n"); delay(5000); // wait 5 seconds for next scan }演示效果 {alert type="warning"} ❗ 注：使用wire库，通过Wire.begin(SDA,SCL)这一句来使用软件IIC引脚{/alert}

ESP8266基础按键使用 按键输入使用示例int buttonState = 0; // 设置初始状态为0低电平 void setup() { pinMode(LED_BUILTIN, OUTPUT);//设置LED灯为输出模式 pinMode(0, INPUT);//设置GPIO 0为输入模式 } void loop() { buttonState = digitalRead(0);//读取GPIO 0的电平 if (buttonState == LOW) {//低电平LED亮，高电平LED灭 digitalWrite(LED_BUILTIN,LOW); } else { digitalWrite(LED_BUILTIN, HIGH); } }