Adafruit Soil Sensor I2C Capacitive Moisture Sensor – STEMMA

This design if the soil sensor board is superior with a capacitive measurement. Capacitive measurements use only one probe, don’t have any exposed metal, and don’t introduce any DC currents into your plants. Adafruit uses the built in capacitive touch measurement system built into the ATSAMD10 chip, which will give you a reading ranging from about 200 (very dry) to 2000 (very wet). As a bonus, we also give you the ambient temperature from the internal temperature sensor on the microcontroller, it’s not high precision, maybe good to + or – 2 degrees Celsius.
To make it so you can use the sensor with just about any microcontroller, we have an I2C interface. Connect a 4-pin JST-PH cable (we have a few stocked) to your microcontroller or single board computer to 3-5V power, Ground, I2C SDA and I2C SCL and then run our Arduino or CircuitPython code to read the temperature and capacitive measurement. No soldering required.
STEMMA QT / Qwiic 4-pin 1mm Pitch White Female Connector Cable 150mm Long – Both Sidecan be purchased seperately.
Resources
Primary Guide: Adafruit STEMMA Soil Sensor – I2C Capacitive Moisture Sensor
Keep your plants happy with an I2C temperature/moisture sensor