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Is it possible to set one pin of the serial port continuously high using python (or C)? If yes, how?
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PySerial is a library which provides support for serial connections ("RS-232") over a variety of different devices: old-style serial ports, Bluetooth dongles, infra-red ports, and so on.
Yes serial port hardware is full duplex. Yes, you can use threads to do Rx and Tx at the same time. Alternatively, you can use a single thread loop that does reads with a short timeout and alternates between reading and writing. Save this answer.
Using the pyserial methods setRTS(level=True) and setDTR(level=True) you can control the RTS and DTR lines at will. For instance, the following code will toggle the RTS pin of the first serial port. (See the pyserial documentation for the details).
import time
import serial
ser = serial.Serial(0)
ser.setRTS(False)
time.sleep(0.5)
ser.setRTS(True)
time.sleep(0.5)
ser.setRTS(False)
Yes it is possible using pySerial.
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