ESP32 38 Pin Breakout Board?This ESP32 Breakout Board Only Fit for 38 Pin ESP32 Development Board Without Mounting Holes. Notice: Don't Fit with the ESP-WROOM-32 DevKit V1 Version and Other Versions Double-Layer PCB: This ESP32 Breakout Board is Designed With Double-Layer that One Pin is Wired On Both Sides. Great Contact and Stable Signal Transmission to Your ESP32 Board ESP32 Expansion Board: This Expansion Board Can Expand One GPIO Pin of ESP32 Development Board to Two, Which is Convenient for Users to Reuse All Pins in Smart Home Projects. Nice Breadboard Alternative Two-Type Connections:The Terminal Block Board Can Be Connected Through By Pin Header & Screw Terminal. You Can Choose the Suitable Connecting Way for Your Project,Don’t Need Welding Component,Very Easy to Use