ESP32 I2C ARDUINO设备扫描源程序

原创于 2025-11-01 14:47:09 发布 · 236 阅读

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文章标签：

#I2C #IIC #ARDUINO #ESP32

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1,串口打印截图

在这里插入图片描述

2，ARDUINO代码

SDA=5, SCL=4，根据自己硬件连接修改

#include <Arduino.h>
#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin(5, 4);  // ESP32 SDA=5, SCL=4，根据自己硬件连接修改
  
  Serial.println("\nI2C Scanner");
  delay(1000);  // 等待I2C总线稳定

  byte error, address;
  int nDevices = 0;

  for(address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    
    if (error == 0) {
      Serial.print("I2C device at 0x");
      if (address < 16) Serial.print("0");
      Serial.println(address, HEX);
      nDevices++;
    }
  }

  if (nDevices == 0) {
    Serial.println("No I2C devices found");
    Serial.println("Check: connections, pull-ups, power");
  } else {
    Serial.print("Found ");
    Serial.print(nDevices);
    Serial.println(" device(s)");
  }
}

void loop() {
  // 空循环
}