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HTU21D Sensor เป็นโมดูลวัดอุณหภูมิและความชื้น ใช้ขา 4 ขา ใช้ไฟเลี้ยง 3.3VDC สามารถวัดค่าได้ในระหว่าง -40 ถึง +125°C และ 0 ถึง 100 %RH ตามลำดับ

ค่าความคลาดเคลื่อนของอุณหภูมิอยู่ที่ ±0.3C และความคลาดเคลื่อนของความชื้นอยู่ที่ ±2% การสื่อสารเป็นแบบ I2C 


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Library ไลบรารี่ (หรือหาใน Libraries manager บน Arduino IDE)

     HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems. All you need is two lines for I2C communication and you’ll have relative humidity readings and very accurate temperature readings as a bonus!
 
     There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built in 4.7k pull up resistors for I2C communications. If you’re hooking up multiple I2C devices on the same bus, you may want to disable these resistors.
 
Features :
  • Storage Temperature -40 to 125°C
  • Supply Voltage (Peak) 3.8VDC
  • Humidity Operating Range 0 to 100 %RH
  • Temperature Operating Range -40 to +125°C
  • Typical humidity accuracy of ±2%
  • Typical temperature accuracy of ±0.3C
  • Uses the I2C interface
  • Full interchangeability with no calibration required in standard conditions
  • Instantaneous desaturation after long periods in saturation phase
  • Compatible with automatized assembly processes, including Pb free and reflow processes
  • Individual marking for compliance to stringent traceability requirements

การต่อวงจร HTU21D 


ตัวอย่าง Code HTU21D 


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Exchange or return policy



Every item comes with a 30-day warranty. However, there are certain conditions that apply:

  1. The customer should not be responsible for any self-inflicted damage, such as incorrect power connections (for example, supplying 5V instead of the required 3.3V for a sensor).

  2. The product must be in perfect condition, without any breakage or damage caused by electricity (e.g., short circuits leading to electrical fires).

  3. The store does not accept product exchanges due to customer misunderstandings, such as purchasing the wrong size for their project or buying something without eventually using it. Customers can inquire about the product details and ensure compatibility before making a purchase by contacting us through our Line account @modulemore during business hours. Please note that there may be delays in response between 12:00 PM and 2:00 PM.

Return Policy: To initiate a product return, customers must provide the original receipt or a copy for quick verification. Returns can be sent to our store address by following these guidelines:

  1. Provide a detailed description of the damaged item(s).
  2. Mention any tests or experiments conducted by the customer.

Please note that the store reserves the right to make the final decision regarding product replacement or refund.

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Last updatedSep 7, 2025

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Arduino compatible board, Iot, ESP32, ESP8266, Nodemcu, Raspberry pi, micro:bit and etc.
Mobile number : 0831710868
E-mail : paheyisoicus@gmail.com
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