@Dario Fresu Thank you, I appreciate it 🙏

@Dario Fresu Yeah sure here are some helpful points: 1- Schematic * I placed the µC ESP32-WROOM-32E which supports UART, SPI, SDIO, I2C, LED PWM Wifi, Bluetooth, SD card... (you can check on the datasheet) * I added USB connector and USB to SERIAL module and a handling serial signal circuit (for adaptation) and 2x17 pins headers (for additional peripherals) * Finally, I added USER LED, POWER LED, RESET SWITCH and BOOT/USER SWITCH 2- PCB routing * Board dimensions 800x2500 mils and 4 layers PCB (Top(SIG), PWR, GND and Bottom(SIG)) * Placing the components so that I'll be easier while routing * Specify the Design rules according to the manufactorer capabilities * Routing the PCB and check the DRC 3- Generate the 3D model and finally generate the Gerber files