Sierra Wireless FX30S - Page 80

Sierra Wireless FX30S User Guide
Rev. 7 August 2021 80 41110485
Serial port Enables RS-485
transmitter
GPIO 60 HIGH: Enables RS-485 transmitter. Should
only be enabled when there is an actual
character being transmitted (half-duplex)
LOW: Disables RS-485 transmitter (for
RS232 operation, RS-485 operation in
receive mode, or for power saving)
Serial port Enables RS-485
receiver
GPIO 61 HIGH: Disables RS-485 receiver (for
RS232 operation, RS-485 operation in
transmit mode with no loop-back, or for
power saving)
LOW: Enables RS-485 receiver (for RS-
485 character reception (half-duplex) or for
RS-485 transmit with loop-back)
Serial port Enables RS-485
termination
resistor
GPIO 63 HIGH: Disables the RS-485 termination
resistor
LOW: Enables the RS-485 termination
resistor (should only be used if the serial
interface is in RS-485 mode)
Table D-1: FX30S Hardware Feature to Linux Interface Mapping
Name Function WP
GPIO/
ADC
Linux Interface Description