CFW for KSGER/Quicko STM32 Soldering Stations

[ststefanov13]

Neither it needs nRST pullup, this is internally supplied by the stm32, it would reset itself if it was too weak.

I wrote for the reset circuit for the screen!

I added ferrite rings because I had them

Capacitor for forming reset of lcd  1 microfarad or more  ?

[asupsp700]

I set it to 1uF

[DavidAlfa]

The LCD resets automatically at power-up, only ensure it doesn't randomly reset during operation by some noise.
So you can just use a 100K pullup, there's no need of old-school reset circuit.
Anyways the datasheet is your friend, check it out, most devices have internal pullups/pulldowns to reduce external parts.

[Maksim Berezhnoj]

Dear David. I have two boards (2.1s and 3.1). Both have the same firmware. What diagram should I use to connect the c210 tip? As far as I understand, this is a diagram for connecting c245.

[DavidAlfa]

Hi, try this. C210 have the heater and thermocouple in series just like the T12.
Like always, be prepared to disconnect the station, if  the circuit is wrong the temperature might go out of control.

[Maksim Berezhnoj]

Огромное спасибо за ответ

[JayAwesome]

Just tried to flash the CFW. Bought my KSGER T12 in the official store, version 3.1S. After flashing the "KSGER_v3_OLED.bin" the station doesn't boot up anymore. The splash screen keeps flashing. After flashing the "3.1Snew1.hex" provided on the Github, it would start again (with a different splash screen because of the firmware).

Mainboard revision is "3.0" and the STM32F101 shows the code "20036410", so it should be genuine.

Any ideas?

[DavidAlfa]

Maybe it has the problematic voltage regulator issue, so it can't cope with the extra power.
Try powering it when completely cold, see if it holds a bit longer.

[JayAwesome]

I read about this problem on your Github page. But I did not think this could be my issue, because the soldering station does not boot at all. No matter if I supply the PCB via the ST-Link or via the power supply. There are no hot components on the PCBs either. I've got the black "OLED-V3.0" PCB if that's what matters.

[DavidAlfa]

But does the screen show something?
I understand it's bootlooping at the splash screen, if so, then you're using the correct firmware, a wrong one won't show anything at all.

[JayAwesome]

Yup, it shows the splash screen only for a second. When I hold down the button, I can do a factory reset. That's all.

So I should swap the LDO you say? The one on the front PCB? Any recommendations on which one to use?

[DavidAlfa]

First of all, post a picture of the board to make sure it's one these.
The affected boards run the 3.3V linear regulator right off the 24V, it's just too much power for them.
Try powering it from the ST-Link VDD (Make sure it's 3.3V!), don't plug the AC, should turn on fine, ignore any error messages as the PSU will be off.

[JayAwesome]

Here's a picture of my PCB.

It's exactly the same behavior when powering directly over the pin header. While powering over the PSU, I measure stable 3,32V while booting.

[DavidAlfa]

Try older releases. Though nobody complained, but who knows.

[JayAwesome]

Already tried that, same problem. Didn't flash every single release though. Just some random older ones.

[ahmadzaa]

same as what I use, the same thing happens in ksger v3.0 if you use firmware v3.1s

[JayAwesome]

The 3.1S Firmware from the Github seems to work fine for me. I didn't make a backup of the originale firmware unfortunately.

[DavidAlfa]

Hmm no idea, my only guess is the ADC not working, triggering the IWDG. Try this.

[JayAwesome]

Thanks dude, now your firmware works just fine! So what's the matter (explained for dummies)? Faulty hardware?

[DavidAlfa]

But is everything working normally? Readings, heating...?
The iwdg is a watchdog, if the program freezes somewhere it will reboot the system.
This is crucial here, the tip temperature might go out of control otherwise.
So for some reason the iwdg isn't resetting in your stm32. Never seen this before.

[JayAwesome]

Alright, I used my soldering iron for the whole afternoon. Everything seems to work perfectly. Theres just on thing I noticed: The default temperature is at 320°C. When I adjust the temperature to 330°C, the value isn't saved. Whenever the station goes into standby or whenever I turn it off completely, the temperature is at 320°C again. Is that just a CFW thing?

However, what can I do to use the official firmware build? Do I need to swap the STM32?

[DavidAlfa]

To avoid excesive internal flash wear, saving everytime the temp was changed, that feature was removed, but you can set the default user temp in Iron settings.

No idea why does that stm32 fail that way, it seems to be defective somehow, so yeah I guess a new stm32 should do it.

[JayAwesome]

Alright, thanks for your help! I keep it as it is for now and order a new STM32 at the next opportunity. I keep you updated!

[Jono434]

Is it possible to have an alligator clip or a plug coming out of the back of one these units (Quicko/KSGER) and have it connected to the stand so that the controller can turn it on or off depending on if the handle is connected to the stand?

I remember reading something a few days ago, but it was late at night, and I'm having trouble remembering what to search for?

I'll be reading all of this thread at some point when I find the time, but just wondering if someone can point me in the direction of a post, or some keywords to search for.

If the above is possible, is it possible with stock firmware, or does it need to be custom firmware?

[DavidAlfa]

Needs to be taken from the handle shake signal (Disconnect from handle).
The handle must ground that signal when inserted, or press a switch doing it.
Shake option in Iron settings must be set to stand mode.