Introduction - If you have any usage issues, please Google them yourself
1, 1, the board power, the operating indicator RUNING_LED will flicker at a frequency of one second;
2, through the microcontroller serial 1, you can monitor module login;
3, mobile phone to send "onled" lit LED;
4, the phone sent "offled", extinguished LED;
5, the microcontroller sends the heartbeat frame to the server every 10 seconds, "OK""
6, through the serial assistant to monitor the microcontroller serial 1, you can see the server sent information;