Adafruit AHT20 - Temperature & Humidity Sensor Breakout Board
4566
4566The AHT20 is a nice but inexpensive temperature and humidity sensor from the same folks that brought the vendor the DHT22. You can take sensor readings as often as you like, and it uses standard I2C so its super easy to use with any Arduino or Linux/Raspberry Pi board.
Pinout
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | 1 | power | ground | |
| 3V3 | 2 | power | 3.3 V supply | |
| SDA | 3 | signal | I2C data | |
| SCL | 4 | signal | I2C clock |
Temp and humidity
18 other optionsDHT11, DHT22/AM2302, and DHT20/AHT20 sensors solve the same broad job, but only some are acceptable substitutes in the same circuit.
Gravity: DHT11 Temperature & Humidity Sensor For Arduino visual previewGravity: DHT11 Temperature & Humidity Sensor For Arduino
Acceptable when the design expects a DHT11-class single-data-line module. Lower accuracy/range than DHT22/AM2302.
$4.20
MIKROE DHT22 2 Click visual previewMIKROE DHT22 2 Click
DHT22-class measurement on a mikroBUS Click board. Functionally related to DHT22/AM2302, but not a mechanical drop-in for wired/bare/module DHT sensors.
$21.95
MIKROE DHT22 Click visual previewMIKROE DHT22 Click
DHT22-class Click board. Use for mikroBUS-style designs; verify jumper/pin routing before treating it as interchangeable with another Click variant.
$24.95
DHT20 - AHT20 Pin Module - I2C Temperature and Humidity Sensor visual previewDHT20 - AHT20 Pin Module - I2C Temperature and Humidity Sensor
Modern I2C temperature/humidity option. Acceptable for new designs or redesigns, not drop-in for DHT11/DHT22/AM2302 circuits.
$4.50
AM2302 (wired DHT22) temperature-humidity sensor visual previewAM2302 (wired DHT22) temperature-humidity sensor
Wired/enclosed DHT22-family option. Usually software-compatible with DHT22-style libraries, but connector, cable, and enclosure make it non-drop-in mechanically.
$15.00
Humidity and Temperature Sensor - DHT20 visual previewHumidity and Temperature Sensor - DHT20
I2C temperature/humidity option in the DHT20/AHT20 branch. Useful for new designs or redesigns; not drop-in for single-data-line DHT11/DHT22/AM2302 circuits.
$8.95
Temperature and Relative Humidity Sensor Module (DHT11) visual previewTemperature and Relative Humidity Sensor Module (DHT11)
DHT11-class single-data-line option. Lower capability than DHT22/AM2302; use only where the circuit and library expect a DHT11-style sensor.
$2.50
Fermion: AHT20 Temperature and Humidity Sensor (Breakout) visual previewFermion: AHT20 Temperature and Humidity Sensor (Breakout)
I2C temperature/humidity option in the DHT20/AHT20 branch. Useful for new designs or redesigns; not drop-in for single-data-line DHT11/DHT22/AM2302 circuits.
$3.50
Gravity: AHT20 Temperature and Humidity Sensor visual previewGravity: AHT20 Temperature and Humidity Sensor
I2C temperature/humidity option in the DHT20/AHT20 branch. Useful for new designs or redesigns; not drop-in for single-data-line DHT11/DHT22/AM2302 circuits.
$3.90
Gravity: DHT20 Temperature & Humidity Sensor for Arduino visual previewGravity: DHT20 Temperature & Humidity Sensor for Arduino
I2C temperature/humidity option in the DHT20/AHT20 branch. Useful for new designs or redesigns; not drop-in for single-data-line DHT11/DHT22/AM2302 circuits.
$7.90
Gravity: DHT22 Temperature & Humidity Sensor visual previewGravity: DHT22 Temperature & Humidity Sensor
DHT22/AM2302-class single-data-line option. Check package, connector, timing, pull-up/module assumptions, and firmware sensor type before substitution.
$8.90
DHT11 Temperature-Humidity Sensor + Resistor visual previewDHT11 Temperature-Humidity Sensor + Resistor
DHT11-class single-data-line option. Lower capability than DHT22/AM2302; use only where the circuit and library expect a DHT11-style sensor.
€2.17
DHT22 / AM2302 Temperature-Humidity Sensor + Resistor visual previewDHT22 / AM2302 Temperature-Humidity Sensor + Resistor
DHT22/AM2302-class single-data-line option. Check package, connector, timing, pull-up/module assumptions, and firmware sensor type before substitution.
€6.64
DHT22 temperature-humidity sensor visual previewDHT22 temperature-humidity sensor
DHT22-class bare sensor. Functionally related to AM2302/DHT22 rows; check pull-up, pinout and polling interval before swapping into an existing module/cable design.
$9.95
DHT11 basic temperature-humidity sensor visual previewDHT11 basic temperature-humidity sensor
DHT11-class bare sensor. Same broad single-data-line family as other DHT11 rows, but lower range/accuracy than DHT22/AM2302 and not an upgrade without review.
$5.00
AM2301B - Wired Enclosed AHT20 - Temperature and Humidity Sensor visual previewAM2301B - Wired Enclosed AHT20 - Temperature and Humidity Sensor
Wired/enclosed AHT20-style sensor. Treat as an I2C/new-design option; connector, cable and enclosure prevent mechanical drop-in assumptions.
$7.95
AM2315C - Encased I2C Temperature/Humidity Sensor visual previewAM2315C - Encased I2C Temperature/Humidity Sensor
Encased I2C temperature/humidity sensor. Same broad job as DHT/AHT rows, but it needs wiring, addressing and enclosure review before substitution.
$26.95
Grove - Temperature & Humidity Sensor V2.0 (DHT20) visual previewGrove - Temperature & Humidity Sensor V2.0 (DHT20)
Grove DHT20 module. I2C branch only; useful in Grove/new designs, not a direct substitute for single-data-line DHT11/DHT22/AM2302 modules.
€7.01
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