{"title":"Qwiic Soil Moisture Sensor","handle":"sparkfun-qwiic-soil-moisture-sensor-1","url":"/products/sparkfun-qwiic-soil-moisture-sensor-1","description":"This compact breakout board measures moisture in soil and similar materials using two large exposed pads as conductivity probes. As the soil gets wetter, conductivity between the pads increases, resistance drops, and the sensor produces a higher analog SIG output.For quick setup, the board includes a Qwiic connector and an onboard ATtiny85 MCU that acts as an I2C gateway. You can plug it into a compatible Qwiic ecosystem without soldering, or use the broken-out programming pins for standard I2C or SPI access.The sensing leads use an Electroless Nickel Immersion Gold (ENIG) finish to help protect the contact area in wet, muddy environments. SparkFun also provides documentation including the schematic, Eagle files, hookup guide, Qwiic resource page, Arduino library, Python / MicroPython / CircuitPython libraries, and hardware repository.Features:Plug-and-Play I2C: Connect the sensor to your compatible development ecosystem without ever touching a soldering iron.Broken-Out Pins: If you haven't adopted the Qwiic ecosystem yet, or if you want to reprogram the MCU yourself, we have fully broken out the programming pins so you can easily interface using standard I2C or SPI protocols.I2C Jumper: If you plan to chain multiple Qwiic devices on the same bus, the board includes an easily accessible I2C jumper on the back that you can cut with a hobby knife to disable the pull-up resistors.Variable resistor/conductivity-based moisture sensingElectroless Nickel Immersion Gold (ENIG) Finish on sensing leadsOnboard ATtiny85 handles analog-to-I2C conversionBroken-out programming pins for SPI or standard I2C, plus an adjustable I2C pull-up jumperOutput: Simple analog signal (SIG) out based on moisture levelsI2C Address: 0x281x Qwiic ConnectorSpecifications:Moisture sensing: Variable resistor/conductivity-based moisture sensingSensing lead finish: Electroless Nickel Immersion Gold (ENIG) Finish on sensing leadsMCU: Onboard ATtiny85 handles analog-to-I2C conversionProgramming pins and pull-up jumper: Broken-out programming pins for SPI or standard I2C, plus an adjustable I2C pull-up jumperOutput: Simple analog signal (SIG) out based on moisture levelsI2C Address: 0x28Qwiic Connector: 1x Qwiic ConnectorA practical sensor for automated gardens, smart greenhouses, desk planters and other plant-monitoring projects using Qwiic-compatible boards.","vendor":"SparkFun","product_type":"Soil Moisture Sensor","in_stock":false,"options":[],"variants":[{"id":15801,"title":"Default Title","sku":"SF-SEN-24409","mpn":"SEN-24409","price":12.9,"on_sale":false,"in_stock":false,"available_quantity":0}]}