Products > Test Equipment
Hantek 2000 series - 2C42/2C72/2D42/2D72
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Bluegizmo83:
Has anyone looked into adding wifi to these handheld hantek scopes? I noticed someone commented in this thread that it looks like there is an unpopulated space on the PCB for an ESP8266, but didn't see any other discussions about it. Not knowing what the code should be on the ESP8266 could be an issue, but it might be possible to dump/copy the code from Hantek's IDS1070A USB Wifi scope which also uses an ESP8266 for it's wifi communication...

Edit: the IDS1070A doesn't actually use an ESP8266, just a generic STM microcontroller with built-in wifi. But, it's protocol has already been reverse engineered on GitHub and is just a basic Request-Response protocol, so implementing it on an 8266 should be fairly straightforward.
Horseloaf:

--- Quote from: dotsam on November 21, 2020, 08:49:04 pm ---Just wanted to document somewhere that I was able to update firmware using dfu-util (http://dfu-util.sourceforge.net) which supports the STM DfuSe extension (http://dfu-util.sourceforge.net/dfuse.html) used by this scope. dfu-util should be available as a package on most Linux distros, and also on macOS through homebrew, which is what I used.

Hopefully this is useful to someone!

--- End quote ---

Tremendously helpful, thanks!
Horseloaf:

--- Quote from: Rien on January 21, 2020, 02:32:24 pm ---I think I have put voltage on the terminals when the meter stand in Ohm After opening I have seen 2 o resistors on the underside of the CS7721CN chip above the banana bushes. which are burned.
--- End quote ---


--- Quote from: Microcheap on January 22, 2020, 12:20:59 am ---If only the resistors are burned you are lucky, it's likely that you have damaged the dmm chip. Anyway, if you want to try to repair it, I opened up mine to check the resistors values: R14 is 10K 1% and R15 is 1K 1%.

I've tried to take a picture as well, it is not great but it may help.

(Attachment Link)

Just curiosity, what was the voltage you were measuring?

--- End quote ---

I've just had this happen on my new 2D42 when measuring mains voltage (around 250V AC) with the DMM section set to "AC V". The same two resistors are burned and the display still shows that I have "AC V" selected... Very annoying!
ve7ihl:
I have the 2D72. The DMM DC volts calibration was out by about 10mv. To adjust the DMM calibration (after taking the back case off) use the top pot (farthest away from the bottom of the case) to get an accurate DC voltage measurement. You will need a stable voltage reference and a known accurate voltmeter to compare against. (I used a Fluke 87V that is know to be calibrated). The adjustment is quite sensitive, so make very small adjustments until the meters read the same. You may wish to calibrate in the voltage area of interest, in my case I am mostly interested in around the 12v to 13v area. The meter is not fully linear across the entire range. Make sure both of you meters (and voltage reference source) have been on for about 15 minutes, and both meters have been allowed to be in room temperature for several hours first. The 2nd pot (closest to the bottom of the case) will adjust the AV voltage reading. I could not get mine to match the Fluke 87V meter exactly. best I could get it was about .25 VAC off.
Smajdalf:
I have decided to upgrade my 2C42 to enable the AWG. I have gathered as much information as possible, got the chips and opened my scope. I was surprised everything is already present here - DAC, op amp, R65 that should inform the MCU the DAC is present - everything exactly as in the photos of 2Dx2. I have tried to change FW but no matter what I get the message no AWG is present. I have tried to find what is going on but without any success. The DAC is used to generate the calibration signal with frequency 1 kHz (someone somewhere said some other frequency is generated in the non-DAC version - strange). On the R65 is 0 V at the DAC side and about 3 V on the other side - I was not able to find where it is connected. Do you have some idea what I can try to enable the DAC?

EDIT: I tried to find where is the R65 is connected. One side is connected to the Enable pin of the DAC and FPGA. The other has direct connection to supply voltage of the FPGA. I am quite sure there is no direct connection to the ARM processor. I am not sure if it is connected to any I/O pin of the FPGA. Is it possible it is only a pull-up disabling the DAC until the FPGA overrides it? Can someone confirm this? If there is some short circuit on my board and the resistor should not be connected to FPGA Vcc, can you tell me where it is connected so I can fix it? Thanks.
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