HiLetgo 2pcs AHT21 I2C IIC High Precision Digital Temperature and Humidity Sensor Module DC 2.0-5.5V DHT11 AHT10 Upgraded Version for Arduino
Product ID: 537583542
💧Humidity Range: 0~100%RH
🔌Voltage: DC 2.0-5.5V
🌡️Temp Range: -40~+85℃
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🌟 Elevate Your Sensing Game!
The HiLetgo AHT21 I2C Temperature and Humidity Sensor Module is a high-precision device designed for accurate environmental monitoring. With a measurement range of 0-100% RH for humidity and -40 to +85℃ for temperature, it operates on a voltage of DC 2.0-5.5V, making it an ideal upgrade for Arduino enthusiasts looking to enhance their projects.
| ASIN | B09KGW1G41 |
| Best Sellers Rank | #259,415 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #669 in Temperature Probes & Sensors |
| Date First Available | October 27, 2021 |
| Item Weight | 0.317 ounces |
| Manufacturer | HiLetgo |
| Package Dimensions | 3.39 x 3.19 x 0.28 inches |
M**E
Does the job
This is a home-grown Chinese sensor which does the job of T & RH measurement at an amazingly low cost. That said, the chip maker, Aosong, has made the choice to publish the datasheet for it only in the language of the country of origin, which is new, but not entirely surprising. At any rate, it only took me part of an evening to chase down enough information and example code to be able to write my own code for it for a Raspberry Pi project, and I am quite pleased with what the device delivers.
S**T
Works with K-type Thermocouple
I bought a K-type thermocouple to use with an Arduino and this to measure a popcorn maker temperature. I had to put connectors on the ends of the thermocouple because this is not the right spacing for the thermocouple-type connectors. You'll likely need to put your own connectors on any thermocouple to use with this device, just FYI. Works great for my purposes.
G**R
Low cost and worth the price but 33% failure rate.
I bought 3 and 1 was DOA but the other 2 work fine. They were very inexpensive so I am not complaining and would likely buy again based on the low cost.
J**R
Didnt work with several esp32s - other brands did
junk - neither of them worked. After lots of frustration over getting them to work with either esp8266 or esp32Dev I ordered some from another vendor. Everything worked with someone elses modules.
M**M
1/2 Units Work
1/2 of the units I recieved worked correctly and responded to I2C. This distributor is not properlly testing boards before release given that I'm not alone. The one sensor that is working - I'm getting +/-7 error on tempurature and +/- 5% on relative humidity. After reviewing the datasheet for this product I have determined the board used in this product does not meet the minimum spec for the pull-up resistor 2.0-4.7KΩ (this uses 6k for some very WRONG reason).
Z**E
Works good
Does the job for what I need it for
J**O
Works well with Arduino I2C
AHT20 library returns humidity and temp as float variables. I avoided cleaning the flux off after soldering the pins to keep solvent out of the sensor opening.
M**G
poor quality control
Bought 2, one to prototype on a breadboard and one for the final build. Spent 2 hours trying to connect it over I2C before reading these reviews. Soldered a header onto the second one and slapped it onto my breadboard, and it worked perfectly. But now I need to buy another for the final build without header pins
Trustpilot
5 days ago
2 months ago