The ESP32 functions on 2.4GHz, so it is important to use the 2.4GHz Antenna on the ESP32 SMA Connector. The connector is labeled "ESP32_ RF" on the board. Do not use the 433MHz antenna on the ESP32 SMA Connector.

The ESP32 on this board comes pre-flashed with Marauder and can be used by opening the WiFi Marauder app on your Flipper Zero. If you don't know where to get the WiFi Marauder app, look at the section Setting up your Flipper Zero

The WiFi Marauder app has an ESP32 log that will show you what the ESP32 is doing. You can view the log by opening the WiFi Marauder app and pressing "View Log from > end".