Gravity: SHT31-F Digital Temperature and Humidity Sensor Shipping:2-4 Weeks you'll also need this electret

you'll also need this electret mic and mini 8 ohm speaker

including the voltage regulator that allows the board to be powered from a 2

yet it provides much better performance than other IR alternatives

ie "break" 0x01

followed by the software version 91 5B Get relay states - sends a single byte back to the controller

Gravity: SHT31-F Digital Temperature and Humidity Sensor Shipping:2-4 Weeks you'll also need this electretGravity: SHT31 F digital temperature and humidity sensor is based upon the Sensirion SHT31 F sensor IC. Thanks to Sensirion's CMOSens technology, highly integrated capacitive humidity sensing components and band gap temperature sensing components, the SHT31 F offers high reliability and long term stability with low power consumption, fast response and strong anti interference ability. The sensor supports I2C communication, and is compatible with 3. 3V