Update the firmware of Hantek2D72/2D42/2C72/2C42

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Elected replied at 2019-3-11 06:03
Where can i get a full dump to flash via stlink? Где можно раздобыть полный  ...

There is a thread on EEVblog forum where we are discussing this meter and where you'll find a link for a flash dump:

http://www.eevblog.com/forum/tes ... 2210391/#msg2210391

Just be careful, and use it at your own risk, as it includes calibration data and you can ruin your device.

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crsor replied at 2019-4-23 23:54
Meu hantek 2c42 mostra uma voltagem de pico no pico errada. Ja calibrei as pontas e nada resove. Ten ...

Via ser difícil conseguir uma resposta aqui falando em português, n?o adianta nd ficar repetindo a mesma pergunta. Melhor usar apenas inglês.

By the way, wich FW version are you using? Have you tryied to update the FW and FPGA version?

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crsor replied at 2019-4-24 22:33
Good morning everyone. I'm Brazilian and I need help from geniuses. I have the 2C42 with the lates ...

I've answered to your post on eevblog forum. I hope that it will help you.

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crsor replied at 2019-4-27 05:12
Hello grateful for your response. I understood what you wrote. I expressed myself wrong. What someth ...

I answered to you on the EEVblog forum, apparently the problem is that you are using AC coupling to measure a low frequency signal. Change the coupling to DC and check again.
More details on the reasons in this article:
https://blogs.keysight.com/blogs ... _ac_coupl-X0K7.html

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Just tried the last Firmware (2019060601), what were the changes on it? It would be nice to have a change log provided with the main changes between the different FW version.

Anyway, I will try it further to see if it has any improvement, for now I can tell you already it has a new bug: connect the oscilloscope to the USB, when it is disconnected you will see the battery level indicator flashing in red, as if the battery is low, even with the batteries fully charged. Turn the device on and off again and the icon will show the correct battery state.

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amy replied at 2019-8-15 08:57
Sir, I didn't reproduce your problem.
Please give me a video to study.

Hi Amy, Dmitrkov already posted a video, so he can reproduce the problem as well.

I've noticed the issue with the charging status icon in FW 2019050901 and 2019060601. To reproduce it, just connect the device to a USB port in a computer or the wall charger while in scope mode. In DMM or AWG mode de icon status works normally. When the cable in disconnected, the battery icon flashes in red, even with the battery full.

Another bug that is older (I've reported it some time ago, but probably went unnoticed) and I think is more critical is in AWG mode. With the "Gen out" disabled if you use the virtual keypad to enter any parameter of the waveform, when you exit from the keypad the output of the function generator is activated, but the status icon on the display and the led in the play button still indicates it as off.

To try this, set the device to AWG mode, connect "Gen out" to an oscilloscope so you can see the output. Make sure the output of the AWG is off, now press, ie, F2->F2 to open the virtual keypad (works in any parameter), enter a value or just hit enter to exit the keypad. You will see in the oscilloscope that the output is now activated.

If I have some time later, I can try to make a video to ilustrate, but I am pretty sure it is very straight forward to reproduce these problems.

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amy replied at 2019-8-24 16:49
Hi, the bugs have been modified in the latest firmware 2019082401.
Please check.

Hi Amy,

I am testing the FW version 2019082801, I notice that the bugs with the battery icon and AWG are fixed but got a new one: just activate the measurements and set the time base to anything faster than 100ns. You'll see a strip blinking on the screen over the measurements:


I also notice problems with syncronization of the data while controlling the scope with the pc software (I'm using v1.1.11) but I still need to test to see if the problem is in the FW or the software.

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JakeCS replied at 2019-9-20 03:56
How do you calibrate all the DMM functions?

That is an interesting question but, why do you need to calibrate de multimeter? Normally, it is accurate from the factory, unless there is some problem with it, but then calibration may not be the solution.

There are some trimpots on the board for adjustments in the volts range but DON'T touch that if you don't have the right equipment to do a proper calibration, otherwise you will make things worse.

Some of the data maybe also be stored in a EEPROM, so probably not a trivial thing to do.

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I see now, maybe there are some calibration data in the ROM and it was overwritten by the dump from the other device. It would be helpful if Hantek can tell us how to calibrate them but, if you want to try, there are two trimpots beside the battery holder:


One is used to calibrate the AC modes and the other DC. I had to adjust them just once to calibrate the voltage ranges of a costumer's device (he had tempered with it). I notice that it also ajusted the current ranges, but I'm not sure now if the resistance mode was affected.

By the way, if you ever need to fix another bricked device, try to use these files that Hantek provided (instructions are included in the same file): https://www.filemail.com/d/cbjyxhacggoqbdc (save it soon, the link expires in a few hours).

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I've saved a copy of the files. I haven't tested it yet, but if you want to tryit I uploaded a copy to here: https://fil.email/fD7VV1R0

Note that the Filemail's links last only 7 days.