nRF51822 Mac Address

[Fiske]

Do the nRF51822 has valid Mac address on it, or we have to write our own Mac address into the chip?

[bjorn-spockeli]

Hi Fiske,

we program a random MAC address to the FICR registerers( specifically DEVICEADDRTYPE, DEVICEADDR[0], DEVICEADDR[1]) of the nRF51822 during production.

The SoftDevice will read out the address and use it as the MAC address. You can retrieve and set the sd_ble_gap_address_get() and sd_ble_gap_address_set() APIs. However, you should not that sd_ble_gap_address_set() will not alter the FICR registers, it must therefore be called every time you initialize the SoftDevice.

Best regards

Bjørn

[Fiske]

How can we save own own Mac address to the nRF51822 permanently

[bjorn-spockeli]

You can store it in one of the UICR registers, then read it out after you have initialized the SoftDevice and use sd_ble_gap_address_set() to change the address.