To be sure that the problem is not with my code, I ran a similar test with the original Nordic ble_app_hids_keyboard example from SDK 15.0.0. I found that the problem with Windows 10 seems to be related to the use of the increased GATT MTU size. However, when it comes to testing from a Windows 10 PC, the pairing procedure always fails with an error message: "driver error", and specifically, Device Manager reports "Extra end collection found or end collection not found":
I have tested the project with success on an nRF52840-DK, connecting it from various peer devices, such as: After subtracting the header, this allows for an effective payload of up to 64 bytes. For that reason, I had to increase the maximum MTU size ( NRF_SDH_BLE_GATT_MAX_MTU_SIZE ) from the default 23 to 67. The HID device that I have developed however needs to send a larger data payload than a standard keyboard. I have developed a BLE HID (HOGP) device in Nordic SDK 15.0.0 starting from an example project: ble_app_hids_keyboard .
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