Adafruit HTU21D-F Temperature & Humidity Sensor Breakout Board
Adafruit · ADA1899

ADA1899It's summer and you're sweating and your hair's all frizzy and all you really want to know is why the weatherman said this morning that today's relative humidity would max out at a suitablely reasonable 52% when it feels more like 77%.
Pinout
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VIN | 1? | power | module supply input | 3.3-5V |
| GND | 2? | ground | ground | |
| SDA | 3? | signal | I2C data | |
| SCL | 4? | signal | I2C clock |
Environment sensors
7 other optionsChoose between temperature-only, temperature/humidity, pressure and indoor air-quality modules without treating every environmental sensor as a drop-in substitute.
Gravity: DHT11 Temperature & Humidity Sensor For Arduino visual previewGravity: DHT11 Temperature & Humidity Sensor For Arduino
Low-cost DHT11 temperature/humidity module. Same broad job as DHT22, but lower range and accuracy.
$4.20
Fermion: ENS160+BME280 Environmental Sensor - TVOC, eCO2, Temp & Humidity (Breakout) visual previewFermion: ENS160+BME280 Environmental Sensor - TVOC, eCO2, Temp & Humidity (Breakout)
I²C multi-sensor board for air-quality estimates plus BME280 temperature, humidity and pressure. Not a basic DHT substitute.
$29.90
MIKROE DHT22 2 Click visual previewMIKROE DHT22 2 Click
DHT22-class temperature/humidity sensor on a mikroBUS Click board. Functional family match, not a connector or footprint match for bare/Gravity/pin modules.
$21.95
MIKROE DHT22 Click visual previewMIKROE DHT22 Click
DHT22-class Click board. Treat as DHT22-family sensing with mikroBUS-specific wiring and board assumptions.
$24.95
Gravity: Analog LM35 Temperature Sensor For Arduino visual previewGravity: Analog LM35 Temperature Sensor For Arduino
Analog temperature-only module. Useful when humidity is not needed and the controller has an ADC input.
$4.50
DHT20 - AHT20 Pin Module - I2C Temperature and Humidity Sensor visual previewDHT20 - AHT20 Pin Module - I2C Temperature and Humidity Sensor
I²C AHT20/DHT20 temperature/humidity module. A redesign alternative to DHT-style sensors, not a drop-in replacement.
$4.50
AM2302 (wired DHT22) temperature-humidity sensor visual previewAM2302 (wired DHT22) temperature-humidity sensor
Wired DHT22/AM2302-family sensor. Same broad sensing class as DHT22, but cable and package change the mechanical fit.
$15.00
Explore other component groups
Gravity: DHT11 Temperature & Humidity Sensor For Arduino visual preview
MIKROE DHT22 2 Click visual preview
MIKROE DHT22 Click visual preview
DHT20 - AHT20 Pin Module - I2C Temperature and Humidity Sensor visual previewTemp and humidity
DHT11, DHT22/AM2302, and DHT20/AHT20 sensors solve the same broad job, but only some are acceptable substitutes in the same circuit.
Sensors · Environment sensors · 19 parts
MQ-2 Gas Sensor visual preview
MQ-3 Gas Sensor visual preview
MQ-135 Gas Sensor visual preview
Grove - Air quality sensor visual previewAir quality
Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.
Sensors · Gas & air-quality sensors · 28 parts
VL53L1X Time of Flight (ToF) Sensor Breakout visual preview
Solid State TOF LiDAR - CE30-A visual previewDistance sensors
Compare compact I²C time-of-flight breakouts with industrial LiDAR modules without treating range, field of view, voltage or protocol as interchangeable.
Sensors · Distance sensors · 2 parts
Photo cell (CdS photoresistor) visual preview
TCS3200 Color Sensor visual previewLight and colour
Photoresistors and color sensors both respond to light, but they expose very different signals and are not sensible drop-in substitutes.
Sensors · Light & color sensors · 2 parts