This product is a Bluetooth-compatible module based on universal serial interface. It has built-in BLE 4.2 protocol stack, which can realize data conversion between user serial port and Bluetooth-compatible interface.

Notes:

To ensure that all configuration procedures are correct, first reset the module to factory settings. Modules that are already in factory mode can skip this step.

Provide 5V (1000mA) power supply to power on the module, wait for about 1 second, let the module start up. After the startup is completed, pull down the ES0 (PIN5) pin for more than 6S. When the LED corresponding to the STA is always on, it means that the module is restored the factory settings successfully, then release the ES0 pin, the system will automatically restart. The system is already in factory mode after rebooting.