Well, I asked too soon. I hope someone benefits from this self answer.
So this works to read and write from both the emulator and the actual device. I am not exactly sure why, and would appreciate an explanation, but this does work in all of my tests
import serial
class VISA:
def __init__(self, tty_name):
self.ser = serial.Serial()
self.ser.port = tty_name
# If it breaks try the below
#self.serConf() # Uncomment lines here till it works
self.ser.open()
self.ser.flushInput()
self.ser.flushOutput()
self.addr = None
self.setAddress(0)
def cmd(self, cmd_str):
self.ser.write(cmd_str + "\n")
sleep(0.5)
return self.ser.readline()
def serConf(self):
self.ser.baudrate = 9600
self.ser.bytesize = serial.EIGHTBITS
self.ser.parity = serial.PARITY_NONE
self.ser.stopbits = serial.STOPBITS_ONE
self.ser.timeout = 0 # Non-Block reading
self.ser.xonxoff = False # Disable Software Flow Control
self.ser.rtscts = False # Disable (RTS/CTS) flow Control
self.ser.dsrdtr = False # Disable (DSR/DTR) flow Control
self.ser.writeTimeout = 2
def close(self):
self.ser.close()