# IOC ## Firmware ### General * All serial links run at 19200 baud ### Bootloader * The bootloader is a standard Arduino bootloader with the following additions * Use ASCII command 'X' to enable byass mode. Everything received on UART RX will be forwarded to UART TX until the next reset. * Use ASCII command 'Y' to set the next unit in the chain into bypass mode. * Use ASCII command 'Z' to immediately launch into the user firmware * Use the following avrdude command to program: `avrdude -p m8 -P /dev/ttyUSBx -c arduino -b 19200 -U flash:w:$(TARGET).hex`