{"title":"Adafruit STEMMA Soil Sensor - I2C Capacitive Moisture Sensor","handle":"adafruit-stemma-soil-sensor-i2c-capacitive-moisture-sensor","url":"/products/adafruit-stemma-soil-sensor-i2c-capacitive-moisture-sensor","description":"The Adafruit STEMMA Soil Sensor uses capacitive measurement to detect soil moisture — a more durable approach than resistive sensors that corrode over time. With a single probe and no exposed metal, it avoids oxidation issues and won't introduce DC currents into your plants.\n\nThe ATSAMD10 microcontroller provides capacitive touch readings ranging from approximately 200 (very dry) to 2000 (very wet), plus an ambient temperature reading (±2 °C). Connect via a 4-pin JST-PH STEMMA cable to any 3–5V microcontroller over I2C — no soldering required.\n\nKey Features\n\n\nCapacitive Moisture Sensing – No exposed metal, no corrosion, no DC current in soil\n\nMoisture Range – ~200 (very dry) to ~2000 (very wet)\n\nTemperature Sensor – Built-in ambient reading (±2 °C)\n\nI2C Interface – 4-pin JST-PH STEMMA connector for plug-and-play wiring\n\n3–5V Compatible – Works with any microcontroller or single-board computer\n\nATSAMD10 Chip – Onboard microcontroller handles all measurements\n\n\nIdeal For\n\nAutomated plant watering systems\nGarden and greenhouse monitoring\nSoil moisture data logging\nEducational science projects\n\n\nPackage Contents\n\n1× STEMMA Soil Sensor board\n\n\n\nNote: JST 4-pin PH cable required (not included). Compatible with Seeed Grove cables. Arduino and CircuitPython libraries available.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":7914,"title":"Default Title","sku":"AF-4026","price":15.01,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}