Screendump From Siglent DSO via VXI-11

sds_scdp.py

#!/usr/bin/env python

import argparse
import sys, time
import pyvisa as visa
from pyvisa.constants import StatusCode

from PIL import Image
from io import BytesIO

def screendump(device, filename):
    rm = visa.ResourceManager('@py')

    # Siglent device
    scope = rm.open_resource('TCPIP::%s' % device)
    scope.timeout = 1000 # ms
    scope.read_trermination = None

    print(scope.query('*IDN?'))
    scope.write('SCDP')
    print(scope.last_status)

    if scope.last_status == StatusCode.success:
        time.sleep(1)
        fp = BytesIO()
        count = 0
        try:
            data = scope.read_raw(20000000)
            fp.write(data)
            count = len(data)
        except:
            print("timeout")
            pass
        print("Read {} bytes.".format(count))
        image = Image.open(fp)
        image.save(filename)
    scope.close()
    rm.close()

if __name__ == '__main__':

    parser = argparse.ArgumentParser(
        description='Grab a screenshot from a Siglent LXI device.')
    parser.add_argument('--output', '-o', dest='filename', required=True,
        help='the output filename')
    parser.add_argument('device', metavar='DEVICE', nargs=1,
        help='the ip address or hostname of the DSO')
    
    args = parser.parse_args()
    screendump(args.device[0], args.filename)
   

Updated to write arbitrary image format based on file extension using PIL

Thank you for your upload! Works well after a few changes. Replaced the write to file part with simple f = open(filename, "wb" and such so I didn't have to install additional files.
Also the rm = visa.ResourceManager('@py') caused some weird issues where it coudn't find a package so i removed the '@py' part
Then I also made so the Software would dump all pics in my C:/temp folder with different filenames so they could be recovered and made so it removed files that are more than 1 month old.

I get an error from the n, status = scope.write('SCDP') line. It says Exception has occurred: TypeError
cannot unpack non-iterable int object

I get an error from the n, status = scope.write('SCDP') line. It says Exception has occurred: TypeError
cannot unpack non-iterable int object

I just updated the code to address the API changes to the pyvisa library.

Thank you for your upload! Works well after a few changes. Replaced the write to file part with simple f = open(filename, "wb" and such so I didn't have to install additional files.
Also the rm = visa.ResourceManager('@py') caused some weird issues where it coudn't find a package so i removed the '@py' part
Then I also made so the Software would dump all pics in my C:/temp folder with different filenames so they could be recovered and made so it removed files that are more than 1 month old.

I handle file management in a bash wrapper script. It knows how to construct the path name with the destination directory and put a timestamp on the filename. PIL is used so the screen dumps can be written out in more efficient image formats such as JPEG and PNG.

Thanks !
Worked great on macOS 10.15.7 with Python3. Only added this comment to file so I remember more quickly how to use.

\#to use: In terminal move to this files directory. Paste following and return: python3 screenDump.py --output some_name.png 192.168.1.5 \# you need the filename.png and the current DHCP address. Note that jpg are 34KB vs 2KB and look blobbier

Might need a slight change to work with USB from command line.

I should add that this code will work to dump screenshots from all of my Siglent gear. I use this code (renamed to siglent_scdp.py) to dump screenshots from the following equipment: SDM3065X, SDG2042X, SSA3021X, and SDS2204X. I have wrapper scripts that look something like this to automatically save and display a screenshot:

#!/bin/sh
DEVICE=sdg2122x
image="${HOME}/Pictures/${DEVICE}-$(/usr/bin/date -Iseconds).png"
/usr/bin/python ${HOME}/bin/siglent_scdp.py -o $image ${DEVICE} 2> /tmp/error
/usr/bin/eog $image

These scripts (one for each device) are mapped to some of the special keys on my Microsoft keyboard. It just takes a single keypress to grab a screenshot.