The ESP32-S2-Kaluga-1 kit is equipped with an LCD display, which can be used for human-computer interaction. However, an error message appears during the compilation and download of the routine progra
1. SD card hardware schematic diagramSD cards use a 9-pin interface for communication, including 3 power lines, 1 clock line, 1 command line, and 4 data lines, as follows:CLK : Clock line, generated b
Humidity sensitive capacitors (English name: humicap) are generally made of polymer film capacitors. Commonly used polymer materials include polystyrene, polyimide, cellulose acetate, etc. When the am