How to assign a callback to a BLE service's characteristic in ESP-iDF

[brahmajit]

I'm not using nimBLE but in nimBLE I can use ble_gatt_chr_def struct which has ble_gatt_access_fn *access_cb that gets executed when the characteristic is read or written to. In Arduino I can do

Code: Select all

foo_char->addDescriptor(new BLE2902());
foo_char->setCallbacks(new foo_charCallbacks());

What's the equivalent for IDF? I'm using the gatt_server_service_table example from idf tags 4.4.3.

[brahmajit]

anyone got any clues?