Gravity: SHT31-F Digital Temperature and Humidity Sensor Shipping:2-4 Weeks followed by the software version

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

yet it provides much better performance than other IR alternatives

Meaningful results can be available within 1 ms in typical cases (ie when not trying to measure subtle differences in low-reflectance scenarios)

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

Gravity: SHT31-F Digital Temperature and Humidity Sensor Shipping:2-4 Weeks followed by the software versionGravity: 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