Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | AM2301A / DHT21 |
| Interface Type | Single-Wire Digital |
| Humidity Range | 20% to 90% RH |
| Temperature Range | -40°C to 80°C |
| Humidity Accuracy | ±5% RH |
| Temperature Accuracy | ±0.5°C |
| Operating Voltage | 3.3V to 5.5V DC |
| Sampling Period | 2 seconds |
| Pin Count | 3 Pins (VCC, Data, GND) |
| Package Type | Through-Hole Module |
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for Arduino projects
This sensor works flawlessly with my Arduino Uno. The single-wire interface makes wiring incredibly simple, and the readings are consistent when compared to my standalone hygrometer.
Anonymous
Mar 21, 2026
Rating: 4/5
Good for indoor plant monitoring
I used this to monitor humidity in my greenhouse controller. It's accurate enough for general purposes, though it takes a few seconds to stabilize after power-on.
Anonymous
Mar 17, 2026
Rating: 4/5
Solid performance
Works well inside my smart home enclosure. Just remember not to sample faster than once every 2 seconds or you will get null values.
Anonymous
Mar 08, 2026
Rating: 5/5
Reliable and cost-effective
Great replacement for the older DHT11. The improved accuracy and wider temperature range make it suitable for more serious environmental logging applications.
Anonymous
Mar 03, 2026
Rating: 5/5
Easy to code for
Found plenty of libraries online to get this running with ESP32 immediately. No calibration needed out of the box for my science fair project.
Anonymous
Mar 03, 2026
Rating: 5/5
Exactly as described
Arrived quickly and matched the pinout diagram perfectly. The module form factor saves time compared to soldering the raw sensor component.
Q: What is the maximum cable length recommended?
A: For reliable data transmission, we recommend keeping the cable length under 20 meters. Longer distances may require signal buffering.
Q: Does this come with a waterproof casing?
A: No, this specific model is not waterproof. If you need outdoor usage, please look for our DHT22 models with specialized protective housings.
Q: Can I power this with 3.3V logic?
A: Absolutely. The operating voltage range is 3.3V to 5.5V, making it safe for both 3.3V and 5V microcontroller systems.
Q: Is this compatible with Raspberry Pi GPIO?
A: Yes, it is fully compatible with Raspberry Pi. You will need a pull-up resistor on the data line, which many breakout modules already include.
Q: How often should I calibrate this sensor?
A: The AM2301A/DHT21 is factory calibrated and typically does not require user recalibration during its standard lifespan under normal conditions.
Underbite Corrector Case - Portable Magnetic Lanyard Storage Box for Frankel Appliance and TB Palatal Expander
$22.70
Car Tire Stone Removal Tool, Multi-Function Hook for Picking and Extracting Stones from Treads
$6.43
Outdoor Lamp Stand for Camping, Lantern Holder Pole for Street Vending and Night Fishing
$13.89
Waste Removal and Paper Stacking Machine, Automatic Paper Collection and Counting Receiver for Carton Printing Equipment, Carton Factory Machinery
$6,400.00
Sheepskin Baby Rattle - Chewable Traditional Handmade Shaker Bell, Intangible Cultural Heritage Essential for Newborn Care
$57.00
Zhizhi Study Room 'Small Pot Sky' Brush Washer - Traditional Handmade Glass with Lost-Wax Method, Silk Luster, Double-Compartment Water Vessel
$457.00
Zao Boshi Insulated Food Cart - Programmable Banquet Warmer for Buns, Breakfast Items, and Hotel Dry/Wet Dishes
$11,566.00
![Lichuan JK [Blood Oath] - Original Authentic Japanese Dark Style Embroidered Sailor Suit - Spring/Autumn Set](https://www.gosteppe.com/cache/small/product/269363/legacy-main-0b86f0b7795c15ee2c8be0d3.webp)
Lichuan JK [Blood Oath] - Original Authentic Japanese Dark Style Embroidered Sailor Suit - Spring/Autumn Set
$59.00
Sink Storage Rack Stainless Steel No-Drill Kitchen Sponge Steel Wool Cloth Pot Lid Organizer Wall-Mounted Drain Rack
$4.93
Sketch Blending Stump Set for Artists - Detail Highlight and Shadow Smudging Tools with Replacement Tips
$14.80
Softening Agent for Board Arcs Melamine Softener Eco-Friendly Board Paint-Free Board Whole House Customization Arc Softener
$9.30
Car Tire Stone Removal Tool - Hook Picker for Cleaning Pebbles from Vehicle Treads
$3.90
Electrical Box with PLC System and VFD for Fans and Pumps
$2,519.00
Zunjue Watercolor Sketchbook 300g Fabric-Covered Journal – Portable Acrylic Marker Book, 100% Cotton Flip-Style Concertina Drawing Paper
$13.70
French Imported Arches Watercolor Paper, Handmade Cotton Pulp 300g Full/Half/4K/8K/16K/32K Rough/Medium/Fine Grain, 185g Cotton Pulp for Postcards and Watercolor Books
$20.80
![[Official Authentic] Zichao Bear Wanda Cinema Popcorn Acrylic Keychain Plush Doll Cute Toy](https://www.gosteppe.com/cache/small/product/269355/legacy-main-ae40bf0d9a6007e2f30a9130.webp)
[Official Authentic] Zichao Bear Wanda Cinema Popcorn Acrylic Keychain Plush Doll Cute Toy
$25.40
Heidelberg Printing Press Automatic Blanket Wash Cloth - Non-Woven Cleaning Fabric, 500m Roll
$3,185.00
Bucket Pack Natural Wood Colored Pencils Water-Soluble for Kids Coloring and Doodling
$6.65
Chunfei Grocery Store Yunm'an GR02 Gravel Bike - Thru-Axle Disc Brake, Lightweight Touring with Multiple Rack Mounts
$6,444.00
Variable Frequency Drive Power Board ZPOW-591 for ACS880
$2,200.00
Professional Sketching Eraser Kit - Blending Stumps, Sponges, and Paper Tortillons for Highlight & Shadow Correction
$3.90
Weighted Water Bag with Handle, Thickened PV Mesh Gravity Ballast for Banner Stand Fixation (8KG)
$35.10
Ultra-Fine Purification Lint-Free Cloth Cleaning Cloth Lens Wipe High Quality 0730 Water-Absorbing Dust Removal UV Nozzle 100 Sheets
$96.00
Wen Zhengming Small Regular Script Calligraphy Cards: Li Sao Jing, Thousand Character Classic, Qin Fu, Cao Tang Shi Zhi, Qing Jing Jing, Record of the Drunken Pavilion, Red Cliff Ode
$59.00
Zhizhi Manshu Zhao Mengfu Small Regular Script Collection of Ancient Classics (Vol. 1) - Calligraphy Copybook, Brush Writing Cards, Foldable Practice Cards
$49.00
Language of Drums Motion Path Set - Essential Creativity and Rhythm Teaching Material for Drum Kits and Jazz Drums
$59.14
onlycook Sink Drain Basket, Faucet-Mounted Food Residue Separator and Washing Strainer - 1 Pack
$14.10
Heavy-Duty Wiper Arms and Blades for Trucks and Agricultural Vehicles - Universal Replacement Wiper Rubber Strips
$5.50
Bus Adapter FEPL-02 for ABB Variable Frequency Drive
$1,230.00
Baby National Trend Rattle Toy – Chewable Silicone, Easy-Grip Handle, Soft Sound for Early Learning
$19.90
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
