Arduino与 iic串口 LCD1602显示屏 连接不成功的要留意这问题了

devcang

  //  Serial.println("I2C Scanning...");
  //  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.
  //
  //    i2c.beginTransmission(address);
  //    error = i2c.endTransmission();
  //
  //    if (error == 0) {
  //      Serial.print("I2C device found at address 0x"); Serial.print(address, HEX); Serial.print(" !\r\n");
  //      nDevices++;
  //
  //    } else if (error == 4) {
  //      Serial.print("Unknow error at address 0x"); Serial.print(address, HEX); Serial.print(" !\r\n");
  //    }
  //  }
  //  if (nDevices == 0) {
  //    Serial.println("No I2C devices found\r\n");
  //  } else {
  //    Serial.println("done\r\n");
  //  }