HRM battery question

I am needing to be able to read my HRM (belt type) battery level. I attempted using
which only reported the value could not be read.

I then used:
Which provided me with all of the Services for my device. Among them was "Battery Value" and with some splitting and cleaning I extracted the Service and Characteristic UUIDs which turned out to be:
service: 0000180a-0000-1000-8000-00805f9b34fb
characteristic: 00002a24-0000-1000-8000-00805f9b34fb

To be sure I then used:
which gave a result of True

From this information I developed the following and by enabling/disabling blocks I got the results as shown in the Comments below each block

My question is what can I do with these numbers to formulate a battery HRM% ?

Thanks to anyone/everyone willing to assist

P.S. a very happy MIT AI new year to everyone

Your byte values match your string result, HRM812S, according to the ASCII table.

Can you take out the battery and read its voltage with a digital voltmeter?

Do you have other batteries you could try to see if the readings correlate?

P.S. I Googled HRM812S and discovered it is the model number. No luck here.

P.P.S. In case you are getting multiple reading messages and the new ones hide the old ones, just JOIN the new incoming data to your Labels:

set Label.Text to JOIN(new data, \n, Label.Text)

Thank You. Yes the voltage is fine and the transmission level -48 to -53 db. Used 2 different batteries and 2 different devices.

I did pick up on the fact that is the model number.. I was going to do an ascii check this morning (wrote post last night).

Maybe my UUIDs are wrong. Do not know what can be next step

Thank You

Yes my UUIDs were wrong. I misread the services list.

Worked too long on the day after not getting enough sleep maybe :joy:

service: 0000180f-0000-1000-8000-00805f9b34fb
characteristic: 00002a19-0000-1000-8000-00805f9b34fb

but hey? at least I know where the model number is tucked away now :crazy_face: