Windows 11 Error opening port

[PricelessToolkit]

Hi, when I choose the com port I get the error "Error opening port" Even the LEDs not blinking on the USB TTL adapter, but with PuTTY communication is working "When I type something I got a response (failed)"

[yellobyte]

Hi there, Win11 isn't the problem. Update the drivers for the small USB-TTL board. Check the respective COM port in the Windows device manager exists. Or try a USB-TTL board with a >>different<< chip (CH340/FT232/CP2102/CP2109/etc.) Cheers

[yellobyte]

And surely, try different USB ports !! USB2.0, 3.0, 3.1, front, rear, on MB, etc. Of my 12 USB-A ports in the PC, two of them reject to work with any USB-TTL adapter. One is a socket on an extension card. The other 10 work flawlessly with all tested adapters. It took a while to figure it out.

[PricelessToolkit]

Thanks for your quick response, yes of course I tried different ports and adapters, I checked it with other software too "TestController" and its works, on all USB ports. I think the program simply can't open the COM port. if I open the same port with any SERIAL program and send "start " I can see incoming data.

[yellobyte]

Tried a different PC ? Laptop ?

[PricelessToolkit]

Thanks for your time! but unfortunately, the same behavior on my wife's laptop, PuTTY, and Arduino IDE serial monitor all work except what I really need.

[PricelessToolkit]

i will try to debug with Virtual Serial Port Emulator https://www.eltima.com/products/vspdxp/?gclid=CjwKCAjwjMiiBhA4EiwAZe6jQ-vn3UOTN0uB0tBPj6i7qf0sD57WjNk7uH_LjHNDOcoxGKpLahnEVhoCFOsQAvD_BwE

[yellobyte]

Maybe running the prog as admin helps

[PricelessToolkit]

When I connect it with a split virtual com port its works COM16 FZ35 COM2 PyTTY COM1 Electronic Load

[yellobyte]

You had successfully opened COM3. Was that a real one ? The load just didn't answer...

[PricelessToolkit]

no COM3 is virtual, he got no answer because I connected the first to the "VIRT COM" and then the real one

[yellobyte]

If VSPE is the solution for you then have fun with the program. Hope it's useful for you. Cheers

[PricelessToolkit]

Thanks

[yellobyte]

As a last thought: Running the prog in a VM with a virtual COM port pinned to a real one might work too.

[PricelessToolkit]

Thanks that is a good idea!

[yellobyte]

Oh yes, please give it a star if you think it's worth one :-) Thx

[yellobyte]

Just for the sake of trying: I build a version 1.2.1 this time with VSCommunity2022/SDK11/Redist2022. Can you please give it a try and see if it fixes your problem on Win11 ? Merci beaucoup! --> rename extension from .jpg to .7z and unzip it for usage. (The one online which gave you COM troubles is V1.2.0 built with VSC2019/SDK10/Redist2019.)

[PricelessToolkit]

Hi, and thanks, no I can't test it with USB-TTL, I integrated Bluetooth module HC-05 "Soldered directly" and it works very well.__

[blackonix-gh]

Hi there, just letting you know that version 1.2.1 on Win11 does not fix the problem

[yellobyte]

Hi, I'm running this tool on different Win11 machines (R9-5900X, i5-11400, Laptop i7-1165G7) connected via CP2102 USB-TTL with driver version 10.1.10.103 without a hint of a problem. I'm puzzled as to what the problem could be.

[yellobyte]

Just gave this one a try and worked as well. Maybe a USB-TTL driver issue ?

[blackonix-gh]

Maybe the problem is in a cheap Chinese USB-TTL module. Unfortunately I can’t check that because I don’t have others at hand

[yellobyte]

Use a CP2102 module and give this one a try: CP210x_Universal_Windows_Driver.zip

[Yoliq]

EDIT after connection adjustment (I had RX connected on RX and TX on TX) issue is still present. Putty connection works fine, see image. So I suppose problem is with SW.

Hello @yellobyte , issue still active with CP2102 chip and driver version 10.1.8. Computer with Windows 11. See images attached. 

[yellobyte]

Pls get me a snapshot of the program when the error message shows up.

[Yoliq]

Pls get me a snapshot of the program when the error message shows up.

Here it is. In the meantime I tested on Windows 10 computer and program works there. See my next post. Snapshot below is from PC with Windows 11 where program do not work.

[Yoliq]

Program works with Windows 10 PC. See images below.

Also see that the driver used is old version --> so this should not be a driver issue.

My guess:

Program works when COM number is 1 decimal (e.g. COM7). But the moment COM number is 2 decimal (e.g. COM13) the program breaks. I would investigate in this direction.

[yellobyte]

Thanks. I'll come back to you.

[Yoliq]

Ok, thank you.

[yellobyte]

New release 1.3.0 is attached. COM issue supposed to be fixed. Pls give it a decent try and report any issues. ElectronicLoadV1.3.0.zip

[Yoliq]

Works like a charm 😁

So far tried:

• connection test
• change load current
• start measurement
• save measurement

Only issue is that Windows Defender auto blocks file when downloaded. So in order to run program you have to temporarily disable it.

[yellobyte]

Thanks for testing! Without further issues I will release this version shortly. Cheers Thomas

[yellobyte]

BTW: You wouldn't happen to know the protocol of the ATORCH DL24 load by any chance ? BTW 2: Did you realize you can click on the values in the "Operational Settings" section and the respective dialog pops up ?

[PricelessToolkit]

By the way, have you tried measuring the accuracy of the device? for my unit is 0.6-0.9A off the measurement.

[yellobyte]

I tested a few of my devices years ago. Below are the pairs Set:Measured, all in Amps, done with a Brymen BM257s. Device 1: 0.01:0.013, 0.02:0.023, 0.1:0.107, 0.2:0.207, 1.0:1.037, 2.0:2.058, 3.0:3.070, 4.0:4.080 Device 2: 0.01:0.004, 0.02:0.013, 0.1:0.093, 0.2:0.194, 1.0:0.993, 2.0:1.993, 3.0:2.993, 4.0:3.994 Device 3: 0.01:0.003, 0.02:0.013, 0.1:0.096, 0.2:0.199, 1.0:1.033, 2.0:2.054, 3.0:3.088, 4.0:4.126 Obviously normal production tolerances. One of the many devices I bought became toast after using for a few minutes at 5A. All others were fine. Overall I'm still satisfied with the little gadgets. You really can't complain at that price anyway. BTW: Does 1.3.0 fix your old COM problem ?

[PricelessToolkit]

That means mine is defective, I haven't checked more than 3 amps. yes, I completely agree, for this price it is a good device. Maybe you know another similar device 2-3 amps but more accurate and up to 100$ ?

Thanks

[yellobyte]

Bought an ATORCH DL24 recently (150W) for 20USD just for playing around with the protocol which is still unknown to me. Not really used or tested so far.

[Yoliq]

BTW: You wouldn't happen to know the protocol of the ATORCH DL24 load by any chance ?

--> sorry to dissapoint, I do not :( Have you tried to contact the manufacturer?

BTW 2: Did you realize you can click on the values in the "Operational Settings" section and the respective dialog pops up ?

--> I did not, its nice little touch!

By the way, have you tried measuring the accuracy of the device? for my unit is 0.6-0.9A off the measurement.

--> Tried yesterday with Lion battery 3S6P configuration. Load currents were set to 2A, 1A, 2.7A. Accuracy was always around +-10mA.

[yellobyte]

Just fyi: I have uploaded version 1.3.1. Only minor changes & a small bug fix to 1.3.0. Clicking on the left chart axis will change scale. Have fun! Oh yes, bug reports are welcome.