Notify and Indication length

RE: Notify and Indication length

Marjeris Romero — Fri, 07 Sep 2018 07:25:10 GMT

Hi,

Yes! Both the nRF52840 dongle and the nRF51 dongle support BLE 4.2. The nRF51 dongle needs to be used in combination with softdevice s130 for BLE 4.2 support.

Best Regards,

Marjeris

RE: Notify and Indication length

EmanuelePozziNordic — Fri, 07 Sep 2018 06:29:57 GMT

Hello,

Great! Thanks.

I ask you another information.

Is a Nordic dongle that support BLE 4.2 available ?

Thanks

Best regards

Emanuele

RE: Notify and Indication length

Marjeris Romero — Thu, 06 Sep 2018 14:16:08 GMT

Hi,

With BLE 4.1 the ATT MTU is 23 bytes, but with BLE 4.2 it can be increased up to 247 bytes. Both notification and indication packet will have a 3-bytes header including the OP-code (operation, 1 byte) and the attribute handle (2 bytes) so the attribute length for notification or indication can be max ATT_MTU - 3 bytes = 244 bytes in BLE 4.2.

Cheers,

Marjeris