User's Manual

Open the Arduino IDE and open the example program
`File`->`Examples`->`BluetoothSerial`->`SerialToSerialBT`. Connect the
device to the computer and select the corresponding port to burn. After
completion, the device will automatically run Bluetooth, and the device name is
`ESP32test`. At this time, use the Bluetooth serial port sending tool on the PC to
realize the transparent transmission of Bluetooth serial data.
#include "BluetoothSerial.h"
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and en
able it
#endif