Eddystone EID-frame issue

[Raj]

Hi, I am working on eddystone project i.e nrf5-sdk-for-eddystone-master which is newly released by nordic. And I set URL,UUID and TLM frames successfully but when I trying to set EID frame board is restarting when I call eddystone_adv_slot_adv_frame_set() function for EID frame. The below code is used to set frames .

here i=2 for TLM frame and I=3 for EID frame

when I comment the line in i=3 block

it advertising uuid, url,tlm,eid frames in tlm data is showing as etelemetry encrypted data and in EID frame it showing only encrypted key which i given in

can any one help me how the security module works and why it not advertising when calling eddystone_adv_slot_adv_frame_set() function for EID frame. And EID frame frame_raw_length is 18.

[ketil]

Hi Raj,

We are currently writing documentation for the nRF5 SDK for Eddystone firmware which will be available in the GitHub repository. It will be up by next week.

[Raj]

I found the issue. In services_and_modules_init() function security module is initialized after initializing the advertising slots (eddystone_adv_slots_init()). So, if try to generate encrypted key for EID frame before initializing security module it leads to system restart. If I initialize advertising slots after security module init is working fine.

[Tony Wu]

Hi Raj,

EID slots are meant to be configured via a BLE Central (e.g. nRF Beacon for Eddystone) which performs an ECDH key exchange and allows the beacon to generate the proper identity keys and EIDs for broadcast. Trying to set an EID frame in firmware will not achieve any security purposes since you do not receive the Central's public ECDH key this way.

Tony