Bluetooth Low Energy (BLE)

Thanks to the ESP32 module, the UNO R4 WiFi has Bluetooth® LE and Bluetooth® 5 capabilities, at a speed of up to 2 Mbps. The ESP32 module has a built in trace-antenna, meaning you do not need an external one to use the connectivity features of the board. However, this trace antenna is shared with the WiFi® module, which means that you cannot use Bluetooth® and Wi-Fi® at the same time.