setRTS appears to do nothing
I have a USB/tty/RF device that allows for serial communications over an RF channel. I have it working when I use my program written in C# and running on a PC. But using python and pySerial, it doesn't work. Although a call to the write() method does indeed return the correct number of bytes that should have been written, the correpsonding read() method (connected to a separate USB/tty/RF device, never receives the data.
I detected the status of the RTS line on both the outgoing and incoming devices while running my C# program (which uses Microsoft's serial class) and they both show 3.3 volts. But when running the python program, using the pySerial class, the RTS line always shows 0 volts. This leads me to believe that the status of the RTS line is the difference between my C# program (using Microsot serial class) and my python program (using pySerial), and that RTS line difference is what's causing the devices to not operate properly.
I tried including the "rtscts = 1" parameter in the call to serial.Serial() and also tried the MySerialDevice.setRTS(1) method. Neither of those resulted in the RTS line actually getting set to 1, i.e. showing a 3.3 voltage on the physical line.
HOW do I get the RTS line on the device to actually get set to logical True (ie. to 3.3 volts)?