Better - Yl105 Datasheet

The "YL105" designation is most commonly associated with three distinct products: an adapter for wireless modules, a water quality sensor, and heat shrink tubing.

The YL-105 is a popular, low-cost capacitive soil moisture sensor. Unlike its resistive counterpart (the YL-69 or FC-28), the YL-105 uses a copper-plated probe to measure dielectric constant. In theory, this prevents corrosion. In practice, without a better datasheet, you face calibration hell. yl105 datasheet better

This graph illustrates the typical SPI communication timing between the microcontroller (Master) and the YL-105 (Slave). The "YL105" designation is most commonly associated with

1. Removing the jumper.
2. Supplying JD-VCC from a separate, isolated power supply (e.g., a 5V AC-DC converter).
3. Keeping VCC from your microcontroller’s regulator.