udpserver
esp8266 server comunicates through udp
protocol
S -> C
- 00 - ping
- 01 - logged in
- 02 - race start
- 03 - race end
- 04 - race abort
C -> S
- byte0: device ID
- byte1: message
message
- x0 - login
- x1 - end
- x2 - pong
- x3 -
esp8266 server comunicates through udp