{"product_id":"dht21-am2301-digital-humidity-temperature-sensor-module","title":"DHT21 AM2301 Digital Humidity \u0026 Temperature Sensor Module","description":"\u003ch2\u003eDHT21 \/ AM2301 Digital Humidity \u0026amp; Temperature Sensor Module\u003c\/h2\u003e\n\u003cp\u003eAccurate, reliable, and easy to integrate — the DHT21 (AM2301\/AM2301A) is a fully digital, single-bus humidity and temperature sensor module designed for makers, engineers, and hobbyists. Whether you're building a weather station, smart home controller, greenhouse monitor, or data-logging project, this compact sensor delivers precise readings with minimal wiring.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% Digital Output:\u003c\/strong\u003e Clean, calibrated digital signal via a single-bus data line — no analog-to-digital conversion needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-Bus Connectivity:\u003c\/strong\u003e Simplified wiring with just one data line, making integration with Arduino, Raspberry Pi, ESP8266\/ESP32, and other microcontrollers fast and straightforward.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelative Humidity Sensing:\u003c\/strong\u003e Polymer capacitive humidity element with excellent long-term stability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Sensing:\u003c\/strong\u003e Integrated NTC temperature module for accurate ambient readings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Measurement Range:\u003c\/strong\u003e Humidity 0–99.9% RH; Temperature -40°C to +80°C.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Accuracy:\u003c\/strong\u003e ±3% RH humidity accuracy; ±0.5°C temperature accuracy (typical).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with AM2301 \u0026amp; AM2301A:\u003c\/strong\u003e Drop-in replacement for standard AM2301\/AM2301A modules.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePolymer Sensor Material:\u003c\/strong\u003e Durable polymer construction with no high-concern chemicals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable:\u003c\/strong\u003e Available for OEM\/custom applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDHT21 \/ AM2301 \/ AM2301A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDigital (Single-Bus)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 – 99.9% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolymer\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh-Concern Chemicals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × DHT21 \/ AM2301 Digital Humidity \u0026amp; Temperature Sensor Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino (Uno, Mega, Nano, etc.)\u003c\/li\u003e\n  \u003cli\u003eRaspberry Pi\u003c\/li\u003e\n  \u003cli\u003eESP8266 \/ ESP32\u003c\/li\u003e\n  \u003cli\u003eSTM32 and most 3.3V–5V microcontroller platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the DHT21 AM2301 sensor compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The DHT21 \/ AM2301 sensor uses a standard single-bus digital protocol that is natively supported by popular Arduino and Raspberry Pi libraries (such as the Adafruit DHT sensor library). Simply connect VCC, GND, and the data pin to your microcontroller and you're ready to read humidity and temperature values.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between DHT21, AM2301, and AM2301A?\u003c\/h4\u003e\n\u003cp\u003eA: These are functionally equivalent sensor models. The DHT21 is the base model designation, while AM2301 and AM2301A are manufacturer variants with the same pin layout and communication protocol. This module is compatible with all three designations and can be used as a direct drop-in replacement.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage does this humidity and temperature sensor require?\u003c\/h4\u003e\n\u003cp\u003eA: The DHT21 \/ AM2301 sensor operates on a supply voltage of 3.3V to 5.5V DC, making it compatible with both 3.3V (ESP8266, ESP32, Raspberry Pi) and 5V (Arduino Uno, Mega) platforms without the need for a level shifter.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the DHT21 AM2301 sensor compatible with Arduino and Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The DHT21 \/ AM2301 sensor uses a standard single-bus digital protocol that is natively supported by popular Arduino and Raspberry Pi libraries (such as the Adafruit DHT sensor library). 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