| Left Header (J1) | Signal | Right Header (J2) | Signal | | :--- | :--- | :--- | :--- | | 1 | 3.3V | 2 | 5V | | 3 | EN (RST) | 4 | GND | | 5 | IO36 (ADC) | 6 | IO37 | | 7 | IO35 | 8 | IO38 | | 9 | IO34 | 10 | IO39 | | 11 | IO33 | 12 | IO40 | | 13 | IO21 | 14 | IO41 | | 15 | IO18 | 16 | IO42 | | 17 | IO17 (LED) | 18 | IO45 | | 19 | IO16 | 20 | IO46 |
When designing a custom carrier board or debugging your YD module, watch out for these issues: yd-esp32-s3 schematic
For beginners: This schematic is excellent because it teaches you classic ESP32 design patterns (auto-reset, RC filters, strapping pins). For professionals: Use this schematic as a baseline, but replace the regulator with an AP2112, route D+/D+ to the native pins, and add a battery charging circuit (e.g., TP4056) for a production-ready design. | Left Header (J1) | Signal | Right