Products > Test Equipment
A look at the Uni-T UT210E
Kbird:
--- Quote from: AudioNoob on March 24, 2018, 05:42:00 pm ---There is talk of using Arduino for modding the multimeter. Do I understand correctly that you can only read the current configuration with Arduino, but still need a dedicated piece of hardware to flash it back after editing?
--- End quote ---
NO the Arduino does both... Uno or Leonardo work , I have done my 210E and 139C ,( same Chip) both threads contain the how too with pics....
Page 8 I think is flywheelz mods....
and
https://www.eevblog.com/forum/testgear/uni-t-ut139c-lcd-biasing-(schematics-avail)/
AudioNoob:
--- Quote from: Kbird on March 24, 2018, 07:37:01 pm ---NO the Arduino does both... Uno or Leonardo work , I have done my 210E and 139C ,( same Chip) both threads contain the how too with pics....
Page 8 I think is flywheelz mods....
and
https://www.eevblog.com/forum/testgear/uni-t-ut139c-lcd-biasing-(schematics-avail)/
--- End quote ---
Thank you very much. My bad, I didn't notice the commented "writeByte()" lines in the Kerry Wong's sketch.
Now I'm only missing one last bit of the puzzle: which Arduino leads are to be connected to which pads on the 210E's circuit board. For the number of posts I've found on which EEPROM values control what, there's an incredible lack of info on how to actually access it.
Kbird:
You apparently skip read :) ...all the info is in Flywheelz post along with Pics of the hookup..... The only thing you need to remember is to switch UT210E selector to any position except OFF.
https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg1034969/#msg1034969
However here are my notes I made from this thread and others, during the mod and some pics....
AudioNoob:
--- Quote from: Kbird on March 24, 2018, 10:25:24 pm ---You apparently skip read :)
--- End quote ---
Not really, I've read that post and even skimmed through the video which demonstrates a different multimeter so not applicable here. But I have missed the tiny pic thumbnail in the end of the post which shows our UT210E. Yes indeed, that's it, thank you!
I have figured out SCL and SDA from 24C02A datasheet and Arduino Wire library description, but I would probably have missed the fact that I need to also ground the WP pin of the 24C02A.
And thanks for the notes, very nice and convenient summary!
Kbird:
The Pics didn't upload so here they are....
they are in the Doc files above too though.
RESET PIN55 is very important ...it will read the eeprom but won't write it if this
isnt a connected properly to the CAP as shown ,
I just held a Dupont wire end onto the Cap while I did the Flash.
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