Bought a volt multi meter that is capable of data logging Hantek 365C USB/Bluetooth Data Logger

[sam_sam_sam]

I have had this in my wish list for quite a while now and I might need to test BMS protection board with this device because of the limitations of the battery testing machine that I have been using

https://www.aliexpress.us/item/32568...yAdapt=glo2usa

What this will allow me to do is use my load testing machine that is having issues with the voltage cutoff set/ current meter monitoring system and I decided not to try to replace it or repair it I just going to use a very primitive load testing device that does not have data logging feature and modify it so that can use this device with that device and hopefully have the best of both worlds

And add this to the data logging meter system

https://www.ebay.com/itm/31503848970...Bk9SR_yFgYG9ZQ

[eccerr0r]

I have an old Atmel AVR project that I'm still using as something not its original intent...

Currently it will sample its 10-bit ADC inputs and its frequency counter(using its software RTC and counter/timer channel) whenever one gives it a serial command to do so. I have it set up to read indoor temperature (using a thermistor + piecewise linear lookup table), outdoor temperature (using a diode and op amp, a rough estimate of wattage from my solar panels based on AC current (very wrong), and the voltage from a combustible gas sensor (which ideally measures carbon monoxide.). I should make it measure voltage/current of my solar panels directly to compute wattage instead of faking it with AC current sense... This has so far been holding me over ever since my mastech DMM that had RS-232 logging that I hacked into it..died. Really should get another way to do datalogging...

Oh...and the frequency counter is hooked up to a humidity sensor oscillator. I have yet to calibrate it...

[sam_sam_sam]

Very interesting use of something that was intended for another purpose which can be very challenging to do been there quite few times in past
I find it very interesting when other people are trying and doing the same things

[sam_sam_sam]

I have an old Atmel AVR project that I'm still using as something not its original intent...

Currently it will sample its 10-bit ADC inputs and its frequency counter(using its software RTC and counter/timer channel) whenever one gives it a serial command to do so. I have it set up to read indoor temperature (using a thermistor + piecewise linear lookup table), outdoor temperature (using a diode and op amp, a rough estimate of wattage from my solar panels based on AC current (very wrong), and the voltage from a combustible gas sensor (which ideally measures carbon monoxide.). I should make it measure voltage/current of my solar panels directly to compute wattage instead of faking it with AC current

Can you please explain this in more detail of how you achieve this effect with a diode and op amp and the other process of how compute the wattage of your solar panels this is a very interesting concept

What is your piecewise linear lookup table look like and what is it based on for accuracy I would be interested in hearing about this concept as well

Why not use an ic chip made to convert amperage to a 0 to 5 volt output that can be used with a micro controller with a mathematical formula looking up table I have done this before it works as long as you do not fast sampling rate the results are decent and could be made to be fairly accurate

[stj]

https://github.com/mp035/hantek-365

[sam_sam_sam]

https://github.com/mp035/hantek-365

very interesting what device were they referring that you could interface with the meter module

[eccerr0r]

Me repurposing my AVR was easy: I had the original sourcecode to the firmware (because I wrote it!) and just changed it to be able to datalog...
It was all putting the constraint on my design: I may only use what I had on hand...

[stj]

very interesting what device were they referring that you could interface with the meter module

it's for Linux, so in theory you could use a raspberry pi type setup