Introduction - If you have any usage issues, please Google them yourself
1, ATK-HC05 Bluetooth module connected through the STM32 USART2, detects and displays the status of the Bluetooth module.
2, through KEY0 button to turn on/off timer to send data (ALIENTEK HC05 xx) Bluetooth module sends data to test ATK-HC05 Bluetooth module.
3, the keys can be set via WK_UP main ATK-HC05 Bluetooth module from the operating mode.