A
Anonymous
Apr 03, 2026
Rating: 5/5
Low Power Consumption
Perfect for my battery operated weather node. Sleep current is very low.
Description
HTU20D/HTU21D digital temperature and humidity sensor module with I2C interface; operating voltage 1.5V~3.6VDC
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Interface Protocol | I²C (Inter-Integrated Circuit) |
| Operating Voltage | 1.5V – 3.6V DC |
| Temperature Measurement Range | -40°C to +125°C |
| Humidity Measurement Range | 0% to 100% RH |
| Temperature Accuracy | ±0.3°C (at 25°C) |
| Humidity Accuracy | ±2% RH (at 25°C) |
| Signal Conversion Time | 50ms (Typical) |
| Package Style | DFN with Breakout Board |
| Microcontroller Compatibility | Arduino, Raspberry Pi, ESP32 |
| Average Current Consumption | 230 μA @ 1Hz Sampling |
5 reviews
A
Anonymous
Mar 22, 2026
Rating: 5/5
Great for Home Automation
Integrated this into my smart home system. Readings are stable and match my other sensors.
A
Anonymous
Feb 08, 2026
Rating: 5/5
Accurate Humidity Reading
Using it to monitor plant humidity. Very responsive to changes in moisture.
A
Anonymous
Jan 31, 2026
Rating: 3/5
Needed help with library
Sensor works but took some time to find the right library for my board. Support helped though.
A
Anonymous
Jan 27, 2026
Rating: 4/5
Good value for money
Works well for university projects. Just be careful with the wiring pinout.
5 FAQ
Q: Can I connect this directly to a 5V Arduino?
A: No, this sensor operates at 3.3V. You should use a logic level converter or an I2C breakout with voltage regulation.
Q: What is the I2C address for this module?
A: The default I2C address is 0x40. It can be changed in some configurations but 0x40 is standard.
Q: Does this come with a waterproof casing?
A: No, this is a bare breakout module. You will need to provide your own enclosure for protection.
Q: Is there a Python library available for Raspberry Pi?
A: Yes, there are several available via pip, such as smbus2 combined with specific HTU21D scripts.
Q: How fast does it update the readings?
A: The typical signal conversion time is around 50ms, but sampling rate depends on your code implementation.
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