ATTNode v3 Case and SHT21 Support

3D-Print / Case / Firmware / v3

An adapted 3D-printable case for the ATTNode v3 is now available. Here is a first look of it (on the left in white) next to the case of an ATTNode v2:

ATTNode v3 vs v2 Case

Also the Firmware now supports the SHT21 Sensor in addition to the BME280.