ESP32 38-Pin Expansion Board

This 38-pin expansion board is designed for standard ESP32 modules like the ESP32-WROOM-32, ESP32-WROVER, and similar variants that use the common dual-in-line pin header footprint. It provides breakout access to all general-purpose I/O, power, and communication pins. Ensure your specific module's pinout matches the board's layout before soldering or inserting.

You typically solder the ESP32 module directly onto the expansion board's female pin headers. Align the module's pins with the corresponding sockets on the board, ensuring correct orientation. Apply solder to each pin connection on the underside of the expansion board PCB. For a non-permanent connection, you can use male-to-female jumper wires, but soldering is recommended for stability and reliable electrical contact in final prototypes.

No, this specific 38-pin breakout is designed for the original ESP32 series pinout. The ESP32-S2 and ESP32-S3 have different pin counts and functions. Using this board with an S2 or S3 module would result in incorrect pin mappings and potential damage. Always use an expansion board specifically designed for your ESP32 variant's exact pin configuration and GPIO layout.

The double-layer FR-4 PCB provides enhanced mechanical rigidity, preventing board flexing which can crack solder joints. It also allows for better routing of power and ground planes, improving signal integrity and reducing electrical noise. The pins on both sides offer convenient access for wiring from either the top or bottom of the board, facilitating cleaner project assembly and easier debugging in complex circuit setups.