UNI-T UT204+ Microcontroller info

[Techmidi]

Today I received the UNI-T UT 204+ clamp meter, I think it is very new in the market I have not found info,
I am trying to extend the amperage range low to 2A I have opened the clamp and from what i see it has a data
port it seems usb, I have connected it to the pc but it gives connection error I leave the samples of the logic
analyzer, to continue the investigation I need to know which It is the used microcontroller, I thought of the
Fortune FS9721 but pins do not match, if someone could tell me what microcontroller it carries would be great

regards

[001]

Nowday top meters of UNI-T usually based on DTM0660/DM1106/ES222 meter chip +  Cortex microprocessor

[Techmidi]

Pin-out is very similar to Fortune FS9952 but not the same also does not match features count 2000 vs 6000 ...
 it could take otp memory
I'm still investigating,
thank you for your support

[Kashif khan]

hello,
read your post for uni-t 204+ about the chip used inside the multimeter unfortunately its is COBed...
well i have uni-t 203+ and i too wanted to reverse engineer the multimeter because i strongly believe the 204+ and 203+ have same hardware just change programing....
i managed to find the chip used inside the multimeter its was "SD7501" datasheet attached, but here the story ends because the chip was OTP and there was no EEPROM chip.
if you could find something interesting ...let us know.
~regards

[abidjbit]

My device ut204+ using Sd7501.