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AHT10 / AHT20 / AHT21B / AHT25 Temperature & Humidity Sensor (I2C)
AHT10 / AHT20 / AHT21B / AHT25 Temperature & Humidity Sensor (I2C)
KShs 300.00
Digital temperature and humidity sensor module in AHT10, AHT20, AHT21B and AHT25 variants. Factory-calibrated and low-power, it connects over I2C to ESP32, ESP8266, Arduino, Raspberry Pi, STM32 and RP2040 boards.
Product Overview
The AHT series temperature and humidity sensor is a factory-calibrated digital sensor on a small I²C module, available as AHT10, AHT20, AHT21B or AHT25.
It gives accurate readings with minimal code, for weather stations, greenhouse controllers and indoor climate monitors.
Key Features
| Feature | Benefit |
|---|---|
| Factory calibrated | Accurate readings without adjustment |
| I²C interface | Two wires to any microcontroller |
| Wide range: −40 to +85 °C, 0–100 % RH | Indoor and outdoor use |
| 2.0–5.5 V supply | Works with 3.3 V and 5 V boards |
| Four variants | Choose AHT10, AHT20, AHT21B or AHT25 |
| Low power | Battery-friendly |
Applications
| Application Area | Example Projects |
|---|---|
| Smart home | Thermostats and climate monitors |
| Weather stations | Temperature and humidity logging |
| Greenhouses | Climate automation |
| HVAC | Ventilation control |
| Education | Sensor interfacing lessons |
Benefits
Easy to connect
Standard pins and supply voltages work with Arduino, ESP32, Raspberry Pi Pico and similar boards.
Well supported
Widely used part with plenty of libraries and example code.
Low cost
An affordable way to add sensing to a project.
Specifications
| Specification | Details |
|---|---|
| Variants | AHT10, AHT20, AHT21B, AHT25 |
| Supply voltage | 2.0–5.5 V DC |
| Interface | I²C |
| Temperature range | −40 to +85 °C |
| Humidity range | 0–100 % RH |
| Accuracy | Up to ±0.3 °C and ±2 % RH (model dependent) |
| Size | About 15 × 10 mm |
| Weight | About 2 g |
| Compatibility | ESP32, ESP8266, Arduino, Raspberry Pi, STM32, RP2040 |
Why Choose This Product?
It’s an accurate, calibrated sensor at a very low price, with simple I²C code on every platform.
Beginner Use Cases
- Make a digital thermometer
- Build an indoor weather station
- Switch a fan by temperature
- Show readings on an ESP32 dashboard
Professional Use Cases
- Smart-building monitoring
- IoT sensor networks
- Automation triggers
- Product prototypes
Package Includes
- 1 × AHT sensor module (selected variant)
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Browse more in Temperature & Humidity.
Additional Information
| AHT SENSOR | AHT10, AHT20, AHT21B, AHT25 |
|---|
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Price range: KShs 200.00 through KShs 230.00
