Customising a bluetooth Zephyr sample

[adam_atmo]

Hi,

I am currently developing with the nRF52 DK (nRF52832 SoC) and the nRF52833 DK (nRf52833 SoC). I have built and flashed the Bluetooth: Peripheral HT sample from Zephyr to both boards successfully. I have tested the application with an Android mobile phone and receive temperature measurements as expected. I would like to customise the source code of this sample application in 2 specific ways:

1. How do I change the TX power?

2. How do I change the PHY to use Coded PHY (S = 8)? I know that this can only be done for the nRF52833.

Thanks,

Adam

[Simonr]

Hi Adam

1. In this case, my colleague Hung has explained how to set the TX power in the nRF Connect SDK (NCS).

2. In order to enable Coded PHY, enable the following Kconfigs in your project: 

CONFIG_BT_CTLR_PHY_CODED=y
CONFIG_BT_EXT_ADV=y

You can also check out the Peripheral Heart Rate Monitor with Coded PHY project that already implements Coded PHY. The Coded PHY and extended advertising also needs to be set in the advertising initialization I believe.

Best regards,

Simon

[adam_atmo]

Thanks for the help Simon,

1. That is for the HCI power control application where the TX power is modulated according to the RSSI. How can I simply set the default power to 8dBm in the Bluetooth: Peripheral HT sample from Zephyr?

2. Can you please be more specific as to what advertising initialization needs to change in the Bluetooth: Peripheral HT sample? Do I need to change the bt_ready function (code attached below)?

Furthermore, under requirements for the Peripheral Heart Rate Monitor with Coded PHY sample, it does not support the nRF52833 DK which I am using. Surely this sample can be built for the nRF52833 as it supports Coded PHY?

static void bt_ready(void)
	{
	int err;
	printk("Bluetooth initialized\n");
	hts_init();
	err = bt_le_adv_start(BT_LE_ADV_CONN_NAME, ad, ARRAY_SIZE(ad), NULL, 0);
	if (err) {
	printk("Advertising failed to start (err %d)\n", err);
	return;
	}
	printk("Advertising successfully started\n");
	}