{"product_id":"elecrow-crowtail-capacitive-moisture-sensor-v20-for-arduino-iot-0039","title":"Elecrow Crowtail Capacitive Moisture Sensor V2.0 for Arduino \u0026 IoT","description":"\u003ch1\u003eElecrow Crowtail Capacitive Moisture Sensor V2.0\u003c\/h1\u003e\n\u003cp\u003eThe Elecrow Crowtail Capacitive Moisture Sensor V2.0 measures soil moisture by capacitance rather than resistance, avoiding electrode corrosion and delivering stable readings over time. Designed for Arduino, ESP8266, and other microcontrollers, it outputs an analog voltage proportional to moisture level, making it a reliable choice for automatic plant watering systems, greenhouse monitoring, and IoT agriculture 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\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eAnalog (0 – VCC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Material\u003c\/td\u003e\n\u003ctd\u003eFR‑4 with capacitive traces\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eCrowtail (compatible with Grove)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e99mm × 20mm × 5mm (probe)\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\u003eAutomatic plant irrigation triggered by dry soil\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-soil-monitor-kit-with-ds18b20-and-sd-logger-greenhouse-ready\"\u003eLow‑power IoT soil monitor using ESP8266 and cloud logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDIY smart greenhouse with multi‑zone moisture mapping\u003c\/li\u003e\n  \u003cli\u003eEducational kit for teaching analog sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe sensor works with any development board that accepts an analog input, including Arduino UNO, Mega, Nano, ESP32, ESP8266, and Raspberry Pi (via external ADC). Its 3.3V\/5V tolerance makes it safe for both logic levels. Pair it with Crowtail base shields or standard Grove‑compatible converters for plug‑and‑play wiring.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the sensor’s VCC and GND to your board’s power, then attach the analog signal pin to any analog input (A0 on Arduino). Avoid submerging the top edge of the probe in water to keep the connector dry. Insert the probe fully into the soil for consistent readings.\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 UNO?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V, GND to GND, and the analog output to any analog pin such as A0. No additional libraries are needed—simply read the analog value.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does capacitive moisture sensing differ from resistive sensors?\u003c\/summary\u003e\u003cp\u003eCapacitive sensors measure changes in dielectric constant rather than electrical resistance between electrodes. This eliminates direct current path through the soil, dramatically reducing probe corrosion and extending sensor life.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat output values represent dry vs. wet soil?\u003c\/summary\u003e\u003cp\u003eIn dry soil, the output voltage is high (close to VCC). As moisture increases, voltage drops. Actual thresholds vary; it’s recommended to calibrate by reading serial values when the probe is in dry soil and in water–logged soil.\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":53445084479853,"sku":"CDN-0039","price":220.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_b4bc711e-7f1b-4ffb-8c47-b65014dcae9f.jpg?v=1781513221","url":"https:\/\/compoden.com\/products\/elecrow-crowtail-capacitive-moisture-sensor-v20-for-arduino-iot-0039","provider":"Compoden","version":"1.0","type":"link"}