Bluetooth module in the multimeter. How would you do?

Question

Arduino

Good day.
I recently discovered the beauty of a bluetooth mutimeter .
But ... it's a pity for him, especially to take on business trips. Yes, and you need much more than one, but money, as always, is not allocated.
And I thought about altering the existing testers. Specifically, about the implantation of a bluetooth module in them.
In the process, I ran into a problem - they are made on different chips.
To be honest, only the decision to remove information from the display pins is spinning in my head. I understand it's ridiculous.
Question: how would you solve this problem?
PS Maybe I already looked at a ready-made solution somewhere?

Answer 1

perhaps in your case it will be easier to make a multimeter from scratch than to try to integrate it somewhere (take for example the dso 138 \ quad input circuits, depending on the accuracy of the percent, leave the same only replace the firmware and install hc05 \ 06 or something more modern) I suspect that on stm+bk3231 dimensions can be entered into the probe.

Answer 2

I think that the cheapest way would be to buy inexpensive multimeters with an RS232 interface and screw Bluetooth modules like ns-05 or hc-06 to them. I used UT60D . For some models that do not have RS232, you can attach it yourself ( article on the topic ). The transfer protocol is open, you can use your own software. There is also a source code example by Henrik Haftmann .

Answer 3

You can try Arduino + external ADC + Bluetooth shield. True, for adjustment you will need a high-precision multimeter