nRF connect desktop app - update MTU field disabled

Hi,

As part of some verification purposes, we need to test out peripheral with the nRF connect Bluetooth low energy app. We have the peripheral set to 2M, DLE enabled and want to sent bulk data to the central using the maximum bandwidth.

As we tried to update the MTU size of the central through the app, we found that the "Update MTU" field is disabled permanently.

Is it possible to enable this field and set the MTU size to max from the default 23 ? See the attached screenshots.

Hardware used: NRF52840 dongle as central, NRF5340DK as peripheral

regards,

Vinu

Top Replies

Amanda Hsieh 13 days ago in reply to VinuGopalakrishnan +1

Could you test with the https://github.com/NordicDeveloperAcademy/bt-fund/tree/main/v2.6.2-v2.3.0/l3/l3_e2_sol ? It will update MTU to 247 once connecting. Then, you could not update MTU from the nRF BLE…

0 VinuGopalakrishnan 11 days ago in reply to Amanda Hsieh

Amanda,

Thanks for the reply. It seems the tool does not support MTU size greater than 247 ? Our code used L2CAP MTU size of 498. When we set the size to 247, data transmission works. See the log below :

regards,

Vinu
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0 Amanda Hsieh 11 days ago in reply to VinuGopalakrishnan

See the answer in this post.
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