Changes
/* Configuration */
SW4 - PORTD: ON->RS-232 OFF->RS-485
SW7 - ON->RS-485 Half Duplex OFF->RS-485 Full -Duplex - Port A-D SW5 - ON->Enables Termination resistor RS-485-Half Duplex- Port A-D SW6 - ON->Enables Termination Resistor RS-485-Full Duplex ** I2C GPIO expander that is located on I2C address 0X27. - Port A-D
** I2C GPIO expander that is located on I2C address 0X27.
=== Open source hardware and software ===
