I think that after a while you’ll realise that working with Bluetooth and Blynk isn’t the beat approach to take. There are some major features missing from Blynk when using a Bluetooth connection, and these will never be resolved because of the lack of direct connection between the device and the Blynk server.
Bluetooth is okay if you want to a way to control a toy buggy with Blynk, but for anything bigger and more serious that that then I think it’s a waste of time.
There is a solution, which s to set-up a local Blynk server and create a local wifi network that isn’t connected to the internet. That’s considerably more work than simply using the Blynk cloud servers over am internet connection, but is really the only practical solution in your case.
If you are thinking of installing an internet connection at home to allow you to use the Blynk cloud servers then you should read this topic:
Pete.