A
Anonymous
Apr 14, 2026
Rating: 4/5
Good value
Accuracy is decent for the price. Wish it came with headers.
Description
HTU20D/HTU21D Digital Temperature and Humidity Sensor Module I2C Interface Communication 1.5V~3.6VDC
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Interface Type | I²C / Two-Wire |
| Supply Voltage | 1.5V to 3.6V DC |
| Operating Temperature | -40°C to +125°C |
| Humidity Range | 0% to 100% Relative Humidity |
| Temperature Accuracy | ±0.3°C (at 25°C) |
| Humidity Accuracy | ±2% RH (at 25°C) |
| Response Time | 5s (63% RH step) |
| Package Style | DFN Surface Mount |
| Current Consumption | 230μA (at 1 sample/sec) |
| Board Compatibility | 3.3V Logic Systems |
5 reviews
A
Anonymous
Apr 07, 2026
Rating: 5/5
Reliable sensor
We use these in multiple student projects. Very robust.
A
Anonymous
Feb 18, 2026
Rating: 3/5
Confusing wiring
Documentation could be better. Took time to find library.
A
Anonymous
Jan 24, 2026
Rating: 5/5
Low power draw
Ideal for battery powered weather nodes.
A
Anonymous
Jan 20, 2026
Rating: 5/5
Great for Arduino
Works perfectly with my Uno using a level shifter. Data is consistent.
5 FAQ
Q: Is the module waterproof?
A: No, the sensor element must not be exposed to water.
Q: Does this work with 5V Arduino?
A: No, it requires 3.3V. Use a logic level converter.
Q: Can I read temp and humidity simultaneously?
A: Yes, but separate commands yield better accuracy.
Q: What library do you recommend?
A: The SparkFun HTU21D library works well.
Q: What is the I2C address?
A: The default unchangeable address is 0x40.
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