Here are the results from using an improved Bluetooth proxy antenna.
I’ve installed the new Bluetooth proxy with the better antenna in the same spot as the previous proxy and removed all other proxies from the area. Here are the results:
As you can see, there is a significant visible improvement in the signal strength by using a better antenna. The signal goes from a -90 to -100 range to a -80 to -90 range with some readings being better than -80.
I hope this information helps other folks here in case you have similar issues.
I came across this article that you mention my TPMS_BLE integration and it seems that you need it to be always available, so I’ve updated it to keep the latest value.
I’ve also included a Last Update sensor to check when the last transmission occurred.
It’s possible to keep the values after restarting Home Assistant, but unfortunately it’s a bit complicated so I couldn’t make it work.