RE: LE Coded Phy on 52840 DK

Ressa — Wed, 29 Apr 2026 12:54:45 GMT

Hi Paul,

To enable Coded PHY support for hci_uart sample you need to add following options to prj.conf file:

CONFIG_BT_CTLR_PHY_CODED=y
CONFIG_BT_CTLR_ADV_EXT=y
CONFIG_BT_EXT_ADV=y

Also bt_le_adv_start cannot be used with Coded PHY. You must switch to extended advertising using bt_le_ext_adv_create() with the BT_LE_ADV_OPT_EXT_ADV | BT_LE_ADV_OPT_CODED options. The BT_LE_ADV_OPT_CODED option causes both primary and secondary advertising to use LE Coded PHY, and connections will also be established on Coded PHY.

You can check below project which is a good example how to use Coded PHY:

Bluetooth: Peripheral Heart Rate Monitor with Coded PHY

Also please note that LE Coded PHY requires Coded PHY support on both sides, the dongle (controller) and the peripheral device.

The sample is already in SDK and you can check the source code. Below is the prj.conf file of the sample:

Best regards,
Ressa