Nrf Connect for PC fails to negotiate ATT_MTU > 247 bytes

[Peter Kenyon]

Using nRF Connect for PC Version 2.6.1

Connect to a peripheral device that ask for an ATT_MTU > 247 bytes

NRF Connect fails with 

Failed to call gattsExchangeMtuReply (NRF_ERROR_INVALID_PARAM)

This is a show stopper

[kobyatom]

same error message here, with #define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 255. 
cannot stay connected.
Did not find any related error in the text log file of the nRF connect application.

[Sigurd]

Hi,

The bug fix for this issue will likely be fixed in the next release of nRF-Connect BLE app. The fix in the underlaying pc-ble-driver-js was just fixed a couple of days ago as part of this PR.