I am in the process of making a custom service for a peripheral I am developing. I have some data that I would like to have in the same characteristic because it will be retrieved and used together on the central side, but I will likely need 21 bytes to do this. As I have understood this there was previously a limit of 20 bytes to characteristics that can be notified, while now we can have up to 251?
I've seen a few posts about increasing MTU size, but none of them have helped me actually implement the needed size on my NRF5340DK. Without modifying any configurations I get the warning: <wrn> bt_att: No ATT channel for MTU 24.
based on some forum posts I found I need to set these in the network core config:
Bluetooth initialization failed (err -5)