AHT20 Temp & Humidity
Works, once you deal with the address
Page 54 drives an AHT20 (I²C 0x38): temperature, humidity, dew point and health — the same readings as page 37.
★ The problem is the address. The AHT20 is fixed at 0x38 and so is the FT6336 touch controller. Both on SDA47/SCL48 fight each other: the touchscreen misbehaves and reads fail. The page keeps a red notice on screen and the health score reports bus clashes separately.
On-screen interface
A recreation of this page on the 2.41-inch AMOLED display (600 × 450). Actual interaction and layout follow the latest firmware.
Key capabilities
Full readings
Temperature, humidity and dew point.
Conflict notice
Permanent warning about 0x38.
CRC check
Bad frames are dropped.
Health score
Separates "not connected" from "touch chip answered".
Technical specs
Typical scenarios
You already own one
Read it before deciding to replace it.
Side-by-side test
Compare against an SHT30 once.
Related commands
page 54 Open the AHT20 page aht Read temperature and humidity
- ★ 0x38 collides with the FT6336 — use an SHT30 (0x44) for long-term use.
- With both online the touchscreen misbehaves and readings glitch.