setDeviceName() fails to set names longer than 32 bytes

ARMmbed / ble-nrf51822

Nordic stack and drivers for the mbed BLE_API

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setDeviceName() fails to set names longer than 32 bytes #84

Closed andresag01 closed 8 years ago

andresag01 commented 8 years ago

It seems that the setDeviceName function call fails in nrf51dk-gcc when supplying a string that is 32 bytes in size or longer. The error returned is BLE_ERROR_PARAM_OUT_OF_RANGE. The Bluetooth v4.2 specification in [Vol3 Part C] Section 12.1 states the following:

The Device Name characteristic value shall be 0 to 248 octets in length.

ciarmcom commented 8 years ago

ARM Internal Ref: IOTSFW-1367

rgrover commented 8 years ago

The Nordic SDK prevents names larger than 31 bytes to be set. Refer to: https://github.com/ARMmbed/nrf51-sdk/blob/master/source/nordic_sdk/components/softdevice/s130/headers/ble_gap.h#L343 This is a restriction imposed by the partner's stack; they choose to not follow the spec in this case. There isn't much we can do about it.

pan- commented 8 years ago

This is a limitation from the Nordic stack, there is nothing this abstraction can do about it. I close this issue.