Reported IOUT current from MDP-P905

ElluIFX / MDP-P906-Controller

Miniware MDP-P906/P905 Digital Power Supply PC Controller without using MDP-M01

The Unlicense

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Reported IOUT current from MDP-P905 #2

Open nikolasgd opened 23 hours ago

nikolasgd commented 23 hours ago

Hi there. Awesome project!

I got it connected from my Thinkpad to my MDP-P905.

I noticed the reported output current in your application seems to be about 2x what is displayed on the power supply. Is this a calibration issue?

ElluIFX commented 13 hours ago

This is strange, I will check it tonight.

ElluIFX commented 13 hours ago

Maybe you can use the Python API to check the raw readings first, as I have not been able to identify any issues from your screenshot.

Is your firmware up to date?

https://forum.minidso.com/forum.php?mod=viewthread&tid=3696

Perhaps this problem is caused by the calibration parameter differences reported by P905 and P906. If possible, you can attach the log file to this issue for me to check.

By setting the system environment variable "MDP_ENABLE_LOG" to "1," the software will create a log file. Perform some operations, and then attach the log file to a comment.

If the problem is finally not found, I can add an option to adjust the calibration parameter, allowing you to manually calibrate the current and voltage readings.

nikolasgd commented 5 hours ago

I have installed the latest firmware on the P905.

I am using the Windows packaged version, is it possible at all to set environmental variables? Will the Python API be able to connect to the USB adapter, if I run the application from within WSL2?

I know how to do all this on my M3 Macbook with Mac OS Sonoma, but there seems to be trouble with the CH340 kernel extension, as all I get is "NRF24-Adapter wait timeout".

ElluIFX commented 5 hours ago

Logging function is also available in release ver, how to set windows env can look this, desired result:
python API can work OS independently, I use this on Windows, but it should work fine in WSL2 or macOS, because it just communicates with the USB-Uart chip. This can be helpful if you use wsl2: nickbeth / wsl-usb-manager
Sry I haven't used macOS. But this chip is used widely in different hardware, maybe you can find a solution online.

nikolasgd commented 51 minutes ago

Thanks for the explanation.

Here is the log file. I set the M905 to 10 Volts and connected a 25W 10 Ohms resistor.

This time I noticed the current (IOUT) value displayed in the application was exactly 2x of the value displayed on my P905. This happens only under load. If the current drops to zero on the P905, it will be reflected correctly in the application.

mdp.log

nikolasgd commented 17 minutes ago

I will try to get the Python API running on Windows, too, and let you know when I have results.