重构发送初始数据 ，改在蓝牙连接状态之后发送初始数据和考试状态

endian11

2020-12-04 8ee5db35d4b70cd13ca31d3783f427208aa8c0a4

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{"road_total_distance":3000,"road_max_speed":60,"stop_car_open_door_allow_time":15,"stop_car_limit_distance":150,"stop_car_edge_red_distance":0.5,"stop_car_edge_yellow_distance":0.3}