Hi all,
I'm trying to use an Orange Pi PC Plus to drive an RS485 serial converter and ultimately talk Modbus to a sensor device. I have managed to get flow control enabled on the port, but the polarity of the RTS signal is active LOW, whereas the converter I have requires active HIGH.
Is there any way to invert the polarity of the RTS pin for the UART? I think it can be done via ioctl call in C programs, but I need this applied at a system level to be compatible with some third party software.
Thanks in advance!