Update MTU Exchange Procedure Not Occurring

[Pamela Keiles]

Hello there,

I have read other issues regarding working with a larger MTU size, but I still have not been able to get it to work correctly. I realize that the peripheral device does not initiate the actual update, but it should request the update procedure since the defined MTU size is larger (CONFIG_BT_L2CAP_TX_MTU=247). I have attached the output configuration file from my build.

Please let me know if you need any more information to help. I am using the SDK Version 1.9.1

Thanks and regards,

Pam

[Einarh]

Hello!

Have you looked at the BLE Throughput example, to see how it's done there?

Best regards,

Einar

[Pamela Keiles]

Hi Einar,

Yes I looked at that example, plus a couple of others. I even just tried to add a few of the configuration options in the throughput example that I did not have to see if it mattered, but it did not make a difference. Note that there I do get a callback that a MTU exchange occurs, but the size specified is only 23. I don't know if this is typical and a second update follows with the larger MTU size, but in either case I am not seeing that.

Thanks,

Pam

[Pamela Keiles]

Does the SDK version matter? I am currently using 1.9.1 but will be looking into updating to the latest 2.0.0.

Thanks,

Pam