lib https://github.com/SodaqMoja/Sodaq_SHT2x
SHT21 Module: GY-213V-SHT21 (5$)
SHT20:
AliExpress: 3.69$
SHT25: self made from SHT20 module (4$) and SHT25 sensor (10$)
AliExpress: 3.5$ for 2
Sensors test examples:
v1 draft multiple humidity sensors comparision
Test 1 with SD datalogging 2 mux 20 hours
Test 1 SD Datalog with AHT10 and high humidity
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 4 v8 RH12 to RH94#SensirionSensorsHumidity
Test 1 v8b Balcony high to mid RH
Test 1 v9 humidity absorber draft