嵌入式 Arduino 搜索i2c地址代码 发表于 2017-04-18 浏览量 431 没有评论 ```c #include <Wire.h> void setup() { Wire.begin(); Serial.begin(9600); Serial.println("nI2C Scanner"); } void loop() { byte error, address; int nDevices; Serial.println("Scanning..."); nDevices = 0; for(address = 1; address < 127; address++ ) { Wire.beginTransmission(address); error = Wire.endTransmission(); if (error == 0) { Serial.print("I2C device found at address 0x"); if (address<16) Serial.print("0"); Serial.print(address,HEX); Serial.println(" !"); nDevices++; } else if (error==4) { Serial.print("Unknow error at address 0x"); if (address<16) Serial.print("0"); Serial.println(address,HEX); } } if (nDevices == 0) Serial.println("No I2C devices foundn"); else Serial.println("donen"); delay(5000); // wait 5 seconds for next scan } ```