★ 1. New soil humidity sensor: the principle of capacitive detection is used to detect soil moisture. The problem of the resistance sensor slightly corrodes is avoided, which significantly extends its service life.
★2. The built-in voltage regulator chip supports a working environment with 3.3~5.5V voltage, which means it also works normally on the 3.3V Arduino main control board. A miniature PC like the Raspberry Pi only requires an external Analog Signal to Digital Signal (ADC) converter module to work.
★3. An external screen, a motherboard, you can talk to your system! Look at the beloved, it is thirsty, you do not need a little more water to moisten.
