BT_LE_ADV_OPT_CODED | BT_LE_ADV_OPT_EXT_ADV backwards compatible?

[MarcelR]

Hi,

I would like our nrf52840 to use coded phy 8x to get longer range.

The counter part are Android smartphones, old ones with BLE 4 support only, new ones having coded phy and extended advertising support.

The question is, if I activate BT_LE_ADV_OPT_CODED | BT_LE_ADV_OPT_EXT_ADV do older smartphones work still fine - is this setting backward compatible?

Configuring BT_LE_ADV_OPT_CODED, do I need BT_LE_ADV_OPT_EXT_ADV as well to work or can I leave it away?

Is the advertising itself (before connecting) also 4 times the range?

thank you
Marcel

[Joakim Jakobsen]

Hello Marcel!

Using coded_phy will not enable older smartphones (with BLE 4.x support) to be connected to the device.

 

Configuring BT_LE_ADV_OPT_CODED, do I need BT_LE_ADV_OPT_EXT_ADV as well to work or can I leave it away?

 Yes, if you are using coded_phy you also need to enable ext_adv.

Br,
Joakim