Gravity: Analog Waterproof Capacitive Soil Moisture Sensor

This is an innovative analog capacitive soil moisture sensor crafted by DFRobot. It brings significant upgrades compared to the old model. First, it has excellent waterproof performance. You can fully submerge it in water, and it will still work flawlessly. Second, the anti - corrosion performance is improved with a laminate design. You don't have to worry about the soil scratching the sensor panel and causing accelerated corrosion. Third, the electrode plate length is increased and the circuit performance is optimized. This expands the measurement range and makes the sensor's readings more accurate. Moreover, the sensor has a built - in voltage regulator chip and supports a 3.3 - 5.5V wide voltage working environment. Whether it's a 3.3V main control board like micro:bit, ESP32, STM8/32, or a mini PC like the Raspberry Pi (with an external ADC), the sensor can function properly. Specification: Supply Voltage: 3.3 - 5.5VDC; Interface: 2.54 - 3Pin; Output Voltage: 0 - 3VDC; Cable Length: 1.5m; Dimension(L x W): 175 x 30mm / 6.89 x 1.18 inches. There are also product wiki and more documents available.

Using this soil moisture sensor is easy. First, connect it to your main control board. Make sure to check the supply voltage requirements (3.3 - 5.5VDC) and use the correct interface (2.54 - 3Pin). If you're using a Raspberry Pi, you'll need to attach an external ADC. When inserting the sensor into the soil, be gentle to avoid damaging the electrode plates. As for maintenance, since it's waterproof and corrosion - resistant, you don't have to worry too much. But it's still a good idea to clean it regularly with a soft cloth if it gets dirty. Also, store it in a dry place when not in use to keep it in good condition.