nrf52832 Bluetooth MAC Address manufacturer

RE: nrf52832 Bluetooth MAC Address manufacturer

Kenneth — Wed, 15 Apr 2020 15:01:50 GMT

FYI: In BLE there are 4 difference address types that can be used:
https://devzone.nordicsemi.com/f/nordic-q-a/2084/gap-address-types/8939#8939

https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/BLE_5F00_GAP_5F00_AddressTypes.png

RE: nrf52832 Bluetooth MAC Address manufacturer

beadon — Wed, 15 Apr 2020 13:43:29 GMT

Very interesting.

MAC addressing was designed from the ground up to be a unique number worldwide, and my understanding is that a manufacturer has a reserved range from which to produce and provide MAC addresses so that the numbers worldwide do not collide. In practice, a random number probably works ahead of 'packaging' under a specific integrator. However, this does raise the likelihood of a MAC collision from the initial design of 0 collisions. I will investigate further with the provider.

Thank you for this informed response.

RE: nrf52832 Bluetooth MAC Address manufacturer

Kenneth — Wed, 15 Apr 2020 11:54:17 GMT

Nordic BLE softdevice stacks by default are using random static address (these are fully random from chip to chip), however if you have purchased a BLE module, it may be that these are pre-programmed devices that have chosen to use public address (which is not random). You can in any case use sd_ble_gap_address_set() to set this as you see fit.

Best regards,
Kenneth