Required for a personal project, maybe feature public release.
Disclaimer: I'm not a coder, at all 
I'm working on a mainly IR Universal & TV remote app compatible with Android 4.4 devices, optional with BT/BLE as secondary app feature.
Give a new life/purpose to old tech like Samsung S4 Mini with built-in IR blaster sensor
Wondering if anyone can help me (better said: build for me 
) an extension:
The app shows "card/button like" the connected/registered appliances/devices, I would like to be able to display on card, on selected/connected device "signal strength" if possible in percentage a.k.a. "30%",so the user can understand straight away if sits too far away from the device or if points the phone blaster in wrong direction resulting in poor/weak "connection",
And maybe if can use the same extension or different one as radar signal to identify which appliances/devices I might be able to connect with-in the range, feature which might help me/user to discover new connections or to use the app for better room placement and obstacle removal.
I would appreciate any guidance, support.
Thank you in advance.
Q: Why Android 4.4 specifically?
A: Because it is much less resource demanding comparing with newer versions starting with v5,
runs better on lower end hardware with minimum rams, most newer devices with newer android doesn't came with built in IR blaster even though can attach external blasters, many people already own these devices or can buy them extra cheap.
Q: Why IR remote?
A: Based on my tests, battery on device can last longer in average with up to 135%, that's approx. 2-3 days extra, depending on many other factors, which I'm working on them as well, besides batteries can be upgraded.
Also because I cannot find anything practical minimal, simple, optimised for touch remote to control my smart tv without WIFI/BT which both drain my battery within 1 day (ish) or without a busy interface on which you end up to easily touch extra buttons, considering I have chubby/bulky fingers 