How to read long strings > 23 Bytes using BLE

[Juan_Antonio]

Try:

RequestMTU change

Hello, I try the method RequestMTU to change to 40 bytes the BLE MTU. I have a oneplus 6 with BLE vers 5.0. I put in the event screen initialise requestMTU to 40 And i put the event when MTU changed. But the MTU never change and stay to 20 bytes. So please how to change the MTU? Do you have an example. Regards. Julien