Setting up broatcasting time interval

[Carl]

Hi there,

i was trying to implement a firmware for a small device using the nRF8001 only in broadcasting mode.

So far, everything works fine. But one thing mentioned in the nRF8001_PS_v.1.1 manual doesn't seem to work. In the section where the broadcast system command (0x1C) is described it is mentioned, the advertising interval can be set in the range of 0x0020 and 0x4000, which means 20ms up to 10.24 seconds.

Everytime I set this value below 0x00A0 (100ms), the nRF8001 returns a fatal hardware error. This event is followed by a HardwareErrorEvent (0x83), which states there was a firmware failure at line (0x10, 0x03) in file "ll_ctrl.s0.c".

Can anyone help me out?

Greetz from Germany, Carl

[David Edwin]

Hi,

the broadcaster is limited to 100ms as per the Bluetooth LE specification. There is a bug in the PS that it allows less than 100ms in the ACI Broadcast command. This should be fixed in the next version of the PS.

Thanks David

[Carles]

Reference:

Volume 6, Part B

4.4.2.2 Advertising Interval

"If the advertising event type is either a scannable undirected event type or a non-connectable undirected event type, the advInterval shall not be less than 100 ms."