Dear @Kevinkun,I see that @Taifun has already responded you, and, in effect, since in the classic BT the devices are “paired”, this makes the communication a one-to-one way.
Pbobably with the BLE, but I’m not sure, because the BLE is a so “nasty dog” that I’ve never tried that!
Cheers.
EDIT: I remember that I’ve connected three PIR sensors driven by three ESP8266 to a pad (always my Lenovo) by means of a local WiFi network, but this is another story
You can take a look here:
Second EDIT:
There is also another possibility (in addition to what @Taifun has already suggested). to have on the same pad both the Classic and the BLE working at the same time with two different servers:
