Perform send and receive operations using the SimpCon UART interface.
Transmit ASCII 0 or 1 whenever the led is turned on or off respectively. The led switched every half second. Therefore, 2 characters per second.
Send as fast as the baudrate allows the repeated series of ASCII values 0 - 9.
Receive from UART and turn on the led when a command is issued, in this case character '1'. The same for turning off the led (character '0' is the command in this case).