DHT22 – Hamtech Electronics Technologies https://hamtechtechnologies.com Sun, 30 Nov 2025 16:24:28 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.3 https://hamtechtechnologies.com/wp-content/uploads/2025/11/h-100x100.webp DHT22 – Hamtech Electronics Technologies https://hamtechtechnologies.com 32 32 DHT22 Sensor https://hamtechtechnologies.com/product/dht22-sensor/ https://hamtechtechnologies.com/product/dht22-sensor/#respond Thu, 20 Nov 2025 19:51:39 +0000 https://hamtechtechnologies.com/index.php/product/dht22-sensor/ DHT22 is a digital temperature and humidity sensor offering high accuracy and reliability for weather monitoring, IoT, and home automation projects.]]> The DHT22 Sensor provides precise measurements of temperature and relative humidity using a capacitive humidity sensor and a thermistor. Unlike its predecessor DHT11, the DHT22 offers wider measurement ranges and higher accuracy. It communicates via a single-wire digital interface, simplifying connection to microcontrollers such as Arduino, ESP32, and Raspberry Pi. Common applications include environmental monitoring, smart home automation, weather stations, and IoT-based projects.

Key Features

  • Measures temperature (-40°C to 80°C) and humidity (0–100% RH)

  • High accuracy and stability

  • Digital single-wire interface for easy connection

  • Long-term reliability for indoor and outdoor applications

  • Compact, low-power, and breadboard-friendly

Specifications

Feature Details
Operating Voltage 3.3–5V DC
Temperature Range -40°C to 80°C
Humidity Range 0–100% RH
Accuracy ±0.5°C (temperature), ±2% RH (humidity)
Communication Single-wire digital
Sampling Rate 0.5 Hz (once every 2 seconds)
Dimensions 15 × 12 × 5 mm

Applications

  • Weather stations and environmental monitoring

  • Home automation and HVAC control

  • IoT and smart agriculture projects

  • Educational and DIY electronics projects

Compatible Boards / Circuits

  • Arduino (Uno, Nano, Mega)

  • ESP32 / ESP8266

  • Raspberry Pi (via GPIO input)

  • Can interface with displays, data loggers, and cloud dashboards

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