| 1 | 2 | 3 | 4 |
|---|---|---|---|
| VDD | SDA | GND | SCL |
1.8-3.6v, no pull-up resistors on the module
Official Datasheet (CN): AHT15规格书v1_1（最新）.pdf
Unofficial Datasheet (EN): Aosong_AHT15_en_draft_0.pdf
Site: http://www.aosong.com/en/products-45.html
Price 3.5$
Sensors test examples:
Test 4 v6 Saturated NaCl solution
Test 2 v7 room RH12 low humidity
Test 1 v8b Balcony high to mid RH
Test 0 v9 balcony high humidity