Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Interface | I²C (Inter-Integrated Circuit) |
| Operating Voltage | 3.3V to 5V DC |
| Humidity Range | 0% to 100% RH |
| Temperature Range | -40°C to +125°C |
| Humidity Accuracy | ±2% RH (typical) |
| Temperature Accuracy | ±0.3°C (typical) |
| Response Time | 5 Seconds (tau63%) |
| Board Dimensions | 25mm x 20mm x 5mm |
| Sensor Chip | HTU21D |
| Current Consumption | 150μA during measurement |
Anonymous
Mar 02, 2026
Rating: 4/5
Good accuracy, slight delay
The sensor is accurate but there is a small delay in reading updates. For most projects, this is negligible. Good value for money.
Anonymous
Feb 27, 2026
Rating: 4/5
Solid Performance
Does exactly what it says. Humidity readings stabilize quickly after power on. Would recommend for indoor monitoring.
Anonymous
Feb 26, 2026
Rating: 5/5
Reliable Module
Bought five of these for a classroom project. All worked out of the box. Pinout is clearly labeled which helps beginners.
Anonymous
Feb 18, 2026
Rating: 5/5
Perfect for Arduino Weather Station
Works flawlessly with my Arduino Uno. The I2C library was easy to find and implement. Readings seem consistent with my home thermometer.
Anonymous
Jan 22, 2026
Rating: 5/5
Compact and Easy
Small form factor fits nicely in my enclosure. Voltage regulation on the board allows 5V logic which is convenient.
Q: Does it come with headers?
A: Yes, the module usually comes with pre-soldered pin headers for easy breadboard use.
Q: Is there a library for ESP32?
A: Yes, there are multiple open-source libraries available for ESP32 that support the HTU21D sensor.
Q: Is this compatible with Raspberry Pi?
A: Yes, it works with Raspberry Pi using the I2C pins. Ensure you enable I2C in the configuration.
Q: Can I use this outdoors?
A: The module itself is not waterproof. You should place it in a weatherproof enclosure if used outside.
Q: What is the I2C address?
A: The default I2C address is typically 0x40. Please refer to the datasheet for configuration options.
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