Adafruit ESP32-S2 Feather with 4MB Flash and 2MB PSRAM - STEMMA QT 3 Channel relay visit the Adafruit learning system

visit the Adafruit learning system

With the UNO R4 WiFi

You can also add a rechargeable battery backpack for portable use

7V Lithium polymer battery and a built-in battery charger that automatically switches to USB power when connected

You can also pick up some double-sided foam tape from a hardware store to mount these

Adafruit ESP32-S2 Feather with 4MB Flash and 2MB PSRAM - STEMMA QT 3 Channel relay visit the Adafruit learning systemThe Adafruit ESP32 S2 Feather is a versatile ESP32 S2 WiFi development board equipped with 4 MB of Flash memory and 2 MB of PSRAM, ideal for your next IoT project. Featuring native USB support, the board can function as a keyboard, mouse, MIDI device, or disk drive. This Feather board supports USB type C or LiPoly battery power options and includes built in battery charging over USB C. It also features a battery monitor chip (MAX17048) that reports