Wow! Very cool! Does that have any effect on accuracy or other aspects of the meter in any way?
I think it's not because this modification don't interfering with analogue front-ends of meter, only digital control inputs are used. Also additional uC it's very low power and stays in sleep mode, current consumption is very low. All of this huge (in comparison ) wires were used for programming and were removed.
I believe that code is for running on that MSP430G2211, so that it knows what do when you long press the blue and yellow button?
Bloody brilliant! I have one of those meters but don't use it that much because I often forget to switch meters off.
What's the significance of that code extract? Is that how you figured out how to make the modification? You didn't have to update the software in the meter, did you?
Well done.
Billy.
Exactly! but it's easy to port this code to other more popular mcu's like attiny2313 etc.
I have only one conclusion after this mod, at first look UT61E have a nice PCB but it's not that great. PCB is lightweight, soldermask can be easily removed and copper is thin. So at least some some soldering skills are required to make this mode for this great meter safety.