testSCPI.py

import argparse
import pyvisa

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description="Test simple SCPI communication via VISA.",
                                     formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("port", type=str, nargs='?', default=None, help="The port to use. Must be a Visa compatible connection string.")
    parser.add_argument("-n", action="store_true", default=False, help="No scan for test SCPI devices. Will be ignored when port is not defined.")
    args = parser.parse_args()
        
    rm = pyvisa.ResourceManager()
    skip_scan = args.n
    if not args.port:
        skip_scan = False
    if not skip_scan:
        print("Scanning for VISA resources...")
        print("VISA Resources found: ", end='')
        print(rm.list_resources())
    else:
        print("No scan for VISA resources.")
    if args.port:
        print(f"Connecting to '{args.port}'")
        inst = rm.open_resource(args.port, timeout=10000)  # You need a large timeout when using serial AWGs
        print("Connected.")
        msgs = ["*IDN?", 
                "IDN-SGLT-PRI?", 
                "C1:OUTP LOAD,50;BSWV WVTP,SINE,PHSE,0,FRQ,50000,AMP,2.1,OFST,0;OUTP ON",
                "C1:BSWV?",
                "C1:BSWV FRQ,10"
                ]
        for m in msgs:
            if m.endswith("?"):
                print(f"Query \"{m}\" reply: ", end='')
                r = inst.query(m).strip()
                print(f"\"{r}\"")
            else:
                print(f"Write \"{m}\"")
                inst.write(m)