Need help how to get ESP32 BLE connection

[lladam]

by: buttonA connect to ESP32A; buttonB connect to ESP32B; buttonC connect to ESP32C; not pick device by list, just connect directly by button.
thanks

[Peter]

You could use the MicroBlocks extension to directly connect. I use it for all my App Inventor <-> Microcontroller projects.

MicroBlocks BLE Extension

MicroBlocks MicroBlocks is a blocks programming language for physical computing. [image] Image of the pilot version of MicroBlocks version 2 It runs on microcontrollers such as the micro:bit, Calliope mini, AdaFruit Circuit Playground Express, and many others. Code Interactively MicroBlocks is a live environment. Click on a block and it runs immediately, right on the board. Try out commands. See and graph sensor values in real time. No more waiting for code to compile and download. Multita…

[lladam]

Great.
a detail help, I'll test it.