Temperature and Humidity Sensor Module HTU21D

The Temperature and Humidity Sensor Module HTU21D is a small breakout board for the HTU21D digital sensor, which measures relative humidity and temperature and sends the readings over the I2C bus. It is accurate, uses very little power and needs only two signal wires, making it a good upgrade over the DHT11 for Arduino, ESP32 and Raspberry Pi weather and environment projects.

Temperature and Humidity Sensor Module HTU21D Specifications

• Sensor: HTU21D digital humidity and temperature sensor
• Interface: I2C, address 0x40
• Humidity range: 0–100 % RH
• Humidity accuracy: ±2 % RH typical (20–80 % RH)
• Temperature range: −40 to +125 °C
• Temperature accuracy: ±0.3 °C typical
• Sensor chip supply: 1.5–3.6 V

Temperature and Humidity Sensor Module Applications

• Indoor weather stations and room monitors
• Greenhouse, incubator and storage monitoring
• Smart home and HVAC projects with ESP32 or ESP8266
• Data logging with Arduino or Raspberry Pi

What's in the Box

• 1 × HTU21D temperature and humidity sensor module

Tip: The HTU21D chip itself is a 3.3 V part, so check whether your module has an onboard regulator before powering it from 5 V; if not, use the 3.3 V pin. Ready-made HTU21D libraries for Arduino and ESP32 make reading it simple.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.