I’d like to monitor temperature and humidity in a remote place. I am wondering if it would be possible to use an old smartphone with HA app installed and some bluetooth sensor connected to the phone? The smartphone would use mobile data transfer and VPN to connect to my main HA.
Is it possible?
Have you found a solution for this? For me the remote place is my car.
I am going to use Android phone as a gateway to the internet for a Wi-Fi sensor. Setup hotspot, limit unnecessary transmission with NetGuard app. As the sensor uses Tuya platform, it broadcasts to a remote sensor. In case I have needed sending data to my HA server, I’d set up VPN/WireGuard.