Bluetooth Low Energy Transmits but does not Receive

[neuheisser]

Confirmed, working.
Check this post

[Solved] Can I use BLE on iOS?

OK - I can finally confirm that BLE transfer works both ways with ESP32 The key is really in setting right properties, and the easiest way for setting things up is flashing the example BLE_notify from ESP32 BLE Arduino folder in Examples Connecting to the device name ESP32 (BLE block) Using CHARACTERISTIC_UUID from the example for Receive block. And basically you got it. Good luck and thanks for help Richard and the others!