Set Chirp sensor an address

Chirp-sensor-set-address.ino

#include <Wire.h>

void writeI2CRegister8bit(int addr, int reg, int value) {
  Wire.beginTransmission(addr);
  Wire.write(reg);
  Wire.write(value);
  Wire.endTransmission();
}

void writeI2CRegister8bit(int addr, int value) {
  Wire.beginTransmission(addr);
  Wire.write(value);
  Wire.endTransmission();
}

void setup() {
  Wire.begin();
  Serial.begin(9600);
                                       //talking to the default address 0x20
  writeI2CRegister8bit(0x20, 1, 0x21); //change address to 0x21
  writeI2CRegister8bit(0x20, 6);       //reset
  delay(1000);                         //give it some time to boot
}

/*loop scans I2C bus and displays foud addresses*/ 
void loop()
{
  byte error, address;
  int nDevices;
 
  Serial.println("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.
    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 found\n");
  else
    Serial.println("done\n");
 
  delay(5000);           // wait 5 seconds for next scan
}