How can I send bluetooth commands to my device?

Hi all,

How can I send bluetooth commands to my device?

I found some similar questions, but no one fits better than this, and if I understood this correctly this is just an example integration who sends bluetooth commands (this one).

Is it really necessary to develop an own integration to send bluetooth commands? As my device is a self-developed ESP32, I do not care too much about advertisements or client/server, i am just looking for an easier way.

(Receiving data seems pretty easy using the BTHome integration, also on ESP32-side).

Can anybody help here?

(I know WLAN / MQTT would be possible, but I am searching for a WLAN-independent solution)