jethro Posted June 10, 2017 Share Posted June 10, 2017 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! Link to comment Share on other sites More sharing options...
Recommended Posts