Wroom32 ESP32 Breadboard adapter

thingiverse

This is an adapter designed specifically for use with Wroom32 ESP32 modules, making it easy to connect these modules to breadboards. I initially used Pogo pins for my ESP8266 adapters but found that using them with Wroom32 was a challenge due to the lack of holes on the module and tighter pin spacing. To overcome this issue, I opted for 1.27mm pin strips which have the same spacing as the module itself. The printed plate required two strips of standard 2.54 pins (16 pins) and three strips of 1.27mm pins (two with 14 pins each and one with 10). The spacing on the 1.27mm pins was intentionally made slightly tighter to ensure a secure connection. I only utilize the outer four contacts in the bottom row as the inner ones are used for flash memory access. To securely hold the pin strips in place, I use epoxy resin. After verifying the connections through testing, I apply additional resin to prevent the pins from shifting or pushing through. For most connections, I employ solderable enamelled wire, while using heavier gauge wire for the GND and 3.3V connections. When working with the 1.27mm strips, it's crucial to exercise care when soldering to avoid bridging the pins. The adapter is mounted on a half-sawn breadboard that has been spaced out wider for better accessibility. The printed joiner plate plays a key role in creating a secure overall assembly. During initial use, it might be necessary to slightly bend out the 1.27mm pins to accommodate the Wroom32 module, but this allows for a firm pressure contact on the module itself.