Thanks for the answers, and Yes I'm using the BLE_client examples from ESP32 BLE arduino. My issue is that the callback is never called. It's worth mentioning that the advertising UUID is different to the service UUID where I connect to, so I needed a little modification, namely scan for one UUID an...

Hi: First post :) I have an issue where I'm using the ESP32 as an BLE CLIENT connecting to a BLE sensor from Nordic. According to Nordic, If I want to receive notifications from a changed characteristic I should write 1 to the CCC (2902). Anyway, I can connect, list the characteristics and see if th...