arduino掃描已連接到arduino的i2c設備地址

ID:349565 · 發表于 2019-2-21 11:08

#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
}