Bluetooth Multimeter Problems

[Tomsdasd]

Hello there,
I've recently been using a Bluetooth multimeter and I'm trying to connect it to my computer to obtain the readings. I've managed to establish the Bluetooth connection, but I'm unsure how to retrieve the data. I've attempted to use your provided code, but it doesn't seem to work. Could you please help me with a solution? Thank you very much!

[ludwich66]

Hello,
nice that you want to use the software.
Could you please be more specific, what device are you using?
Did the BT pairing work?
Have you looked at the wiki pages?
We'll figure it out ;-)

[Tomsdasd]

Currently, I am using the ZT-5BQ device, which connects via Bluetooth Low Energy. I have seen the Bluetooth analysis page, but I'm not sure how to use it.

[Tomsdasd]

Understood. However, I would like to ask about the process of writing the decoding program. Is there any reference material available for me to consult?

[webspiderteam]

all process is explained in ludwichs page https://github.com/ludwich66/Bluetooth-DMM
but basically you have to make Xor operation with these hex values

41	21	73	55	a2	c1	32	71	66	aa	3b	d0	e2	a8	33	14	20	21	aa	bb

for each byte. for example first byte b1^41 second byte b2^21 ....
after that you will get clean results for exampla if auto range symbol on you will get 1 at bit 87 (for big dmms) other wise it can be complicated. because before xor some of them will be 0 for on state others will be 1. after these you have to find which bit makes what but as I said before we already published all bit values in ludwichs page you can find all in there. the other prombel is the digits. if you wil not use a someting like 7seqment display (that every part of digit responds a bit) then you have to get 7 bits of data for a digit and change with equal value (for example 1111101 can be 0 or 0100010 can be means 1. I selected these values randomly for giving example). this can be your starting point.

[Tomsdasd]

Understood, thank you so much for your help. I have made progress on my project in the past few days. However, I would like to inquire about the line chart part. Are there any related packages available for use in UWP to create line charts?

[webspiderteam]

I had found while working with up but it was long time ago. I can't remember what it was

[Tomsdasd]

Understood, thank you very much for your response!

[webspiderteam]

I want to use Bluetooth to receive the current readings detected by ZT-5BQ. I have successfully connected via Bluetooth, and now I want to view the measured values. However, I am unsure how to receive the measurements. I tried using UUIDs and characteristic values to find the data, but I'm not sure if I am using the correct ones.

"0000fff0-0000-1000-8000-00805f9b34fb" Service UUID
"0000fff4-0000-1000-8000-00805f9b34fb" Characteristic UUID