{"product_id":"hr202-humidity-detection-sensor-module-for-arduino-iot","title":"HR202 Humidity Detection Sensor Module for Arduino \u0026 IoT","description":"\u003ch1\u003eHR202 Humidity Detection Sensor Module for Arduino \u0026amp; IoT\u003c\/h1\u003e\n\n\u003cp\u003eThe HR202 is a resistive humidity sensor module that detects ambient moisture levels. It outputs an analog signal proportional to humidity, making it perfect for weather stations, greenhouse controls, and smart home automation. Its compact design integrates easily into microcontroller projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e20% – 90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±5% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;10 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog resistance signal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32mm x 22mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eIndoor digital hygrometer\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-greenhouse-climate-monitor-kit-with-arduino-uno-plus-sensors\"\u003eGreenhouse climate monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart bathroom mirror with fog alert\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eRemote weather station node\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works with any microcontroller that has an analog-to-digital converter (ADC), such as Arduino Uno, ESP32, and ESP8266. It can also interface with Raspberry Pi using an external ADC module like MCP3008. Operating voltage of 3.3V–5V matches most development boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC and GND to the board's power, and the analog output to an ADC pin. No pull-up resistor is needed; the sensor acts as a variable resistor. Keep the sensor exposed to air for accurate readings and avoid physical contact with the sensing element.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, wire the analog output to any analog pin (A0–A5 on Uno) and read the voltage. Use a voltage divider if needed to scale the output.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the HR202 for accurate readings?\u003c\/summary\u003e\u003cp\u003ePlace the sensor in a sealed container with saturated salt solutions of known humidity (e.g., NaCl for 75% RH) and map the output voltage to those reference points.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use it to measure soil moisture?\u003c\/summary\u003e\u003cp\u003eNo, the HR202 is designed for ambient atmospheric humidity. For soil moisture, use a dedicated soil moisture sensor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444954325357,"sku":"CDN-0247","price":65.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_4b29178b-95b0-4e6e-b442-294ecce0e76d.jpg?v=1781512343","url":"https:\/\/compoden.com\/products\/hr202-humidity-detection-sensor-module-for-arduino-iot","provider":"Compoden","version":"1.0","type":"link"}