datasheet http://www.ti.com/lit/ds/symlink/hdc1080.pdf
lib https://github.com/closedcube/ClosedCube_HDC1080_Arduino
Aliexpress: 2.2$
14-bit mode 1/3s
Sensors test examples:
Test 3 48 sensors high humidity spike
Test 2 v5 board stable environment
Test 5 v5 saturated salt solution
Test 4 v6 Saturated NaCl solution
Test 2 v7 room RH12 low humidity
Test 3 v7 balcony RH15-92 changing humidity
Test 3 v8 Humidity absorber RH12
Test 4 v8 RH12 to RH94#HDCx080vsSHT85SensorsHumidity
Test 0 v9 balcony high humidity