Support for Inkbird IBS-P03R Pool Thermometer

[alefchak]

I recently purchased an Inkbird IBS-P03R pool thermometer with the hopes it would work with the existing ITH-20R/IBS-P01R decoder, but it does not. I dug into it a bit and found some differences.

This device seems to broadcast on 868 MHz rather than the 433 MHz of the older models. I'm able to capture some signals, for example:

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2dd41080030100614942d410eb58e700018e5c

This lines up with similar messages from the older models, including the same sync word. I decoded a few of the fields - battery, temperature low byte, temperature high byte shown here. I haven't been able to find correlations with the other fields, or any sort of checksum algorithm that verifies the messages.

Anyone have this device or able to give insight on proceeding?