Products > Test Equipment

Hacking the Siglent SDM3055 Bench DMM

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tv84:
If anyone with a 3045X wants to test the 3055 in his DMM, I can easily prepare an .ADS.

BUT, no responsibility for my side.

tautech:

--- Quote from: alexvg on August 10, 2019, 12:37:52 am ---I'm working on a hack to show more digit to the Siglent SDM3055

To be continued.....................

--- End quote ---
And she busted it !  :palm:

PM pleading for help ...............
And returned.

BillB:
Well, that escalated quickly!   ???

alexvg:
I've done some bash correction to correctly use XML calibration file.
Now the value displayed is correct and the result is very interresting.

I'm investigate to display digits with a little lower font size.

With the input shorted to the ground :

alexvg:

--- Quote ---How to test the sdm-mod ? (only with the latest 1.01.01.19 firmware)

Step 1
Plug a formatted FAT32 USB Key (I use 4GB) into the SDM3055

Step 2
Connect to telnet (username:root, password:ding123)

Step 3
Backup all Siglent data into the USB key :
"cp -R /usr/bin/siglent /usr/bin/siglent/usr/mass_storage/U-disk0/"
After copying, unplug the USB key

Step 4
Plug the USB key into your computer
Copy "sdm-mod.app" into the "/siglent" of the USB key
Unplug the USB key

Step 5
Plug the USB key into the SDM3055 and go to telnet
Stop the current sdm.app application : use "ps" to list all application PID and kill the "./sdm.app" PID.
Generally it's the PID 550, you could kill it with command "kill 550"

Step 6
Prepare and run the mod
"mkdir /usr/bin/siglent/usr/mod"
"cd /usr/bin/siglent/usr/mod"
"cp -R /usr/bin/siglent/usr/mass_storage/U-disk0/siglent/ /usr/bin/siglent/usr/mod/"
"cd siglent"
"./sdm-mod.app"

Step 7
To stop sdm-mod.app, just press "Control C".
Restart the device to return to normal operation.

Step 8
To remove the mod folder
"rm -r /usr/bin/siglent/usr/mod"
--- End quote ---



--- Code: ---sdm-mod.app 20190812 v01
SHA1 : 85ceab5b27570de364ab127d0c67a7deb17903ab
SHA256 : d26b360d6db9a89b058b4d44a2116c546b492e402df37fa1d491276a415fd5d0

Features
- Add 2 digits (7 1/2 digits)

Drawback
- On some menu the sign and/or the last digit is not display correctly

--- End code ---

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