How to use BLE_GAP_PHY_CODED in ble_app_beacon Example

[Ashiq Mohammed]

Dear Team,

I am using NRF52840 for ble_app_beacon and working fine. Now I want to extend the range using 'PHY_CODED' option. Please let me know in this 'ble_app_beacon' example code where I have to update.

Regards

Ashiq Mohammed.

[Vidar Berg]

Hi Ashiq,

The following changes should be sufficient to advertise with CODED PHY:

diff --git a/examples/ble_peripheral/ble_app_beacon/main.c b/examples/ble_peripheral/ble_app_beacon/main.c
index abe39e1..9e3d484 100644
--- a/examples/ble_peripheral/ble_app_beacon/main.c
+++ b/examples/ble_peripheral/ble_app_beacon/main.c
@@ -187,11 +187,13 @@ static void advertising_init(void)
     // Initialize advertising parameters (used when starting advertising).
     memset(&m_adv_params, 0, sizeof(m_adv_params));
 
-    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
+    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
     m_adv_params.p_peer_addr     = NULL;    // Undirected advertisement.
     m_adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
     m_adv_params.interval        = NON_CONNECTABLE_ADV_INTERVAL;
     m_adv_params.duration        = 0;       // Never time out.
+    m_adv_params.primary_phy     = BLE_GAP_PHY_CODED;
+    m_adv_params.secondary_phy   = BLE_GAP_PHY_CODED;
 
     err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
     APP_ERROR_CHECK(err_code);

Note: as far I know, there are no cell phones that have support for coded phy so you need a custom central/BT5 sniffer to receive the packets.

Regards,

Vidar

[Ashiq Mohammed]

Thanks Vidar, I am planning to use NRF52840 for scanning, do I need to configure for BLE_GAP_PHY_CODED for scanning also?

[Vidar Berg]

Yes,  "active" scanning must be enabled, and "scan_phys" must be set to BLE_GAP_PHY_CODED:

/**< Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_param =
{
    .active        = 0x01,
    .interval      = NRF_BLE_SCAN_SCAN_INTERVAL,
    .window        = NRF_BLE_SCAN_SCAN_WINDOW,
    .filter_policy = BLE_GAP_SCAN_FP_WHITELIST,
    .timeout       = SCAN_DURATION_WITELIST,
    .scan_phys     = BLE_GAP_PHY_CODED,
};

[Ashiq Mohammed]

Thank you Vidar. Hope this will help.

[Ashiq Mohammed]

I am trying to use '.scan_phys     = BLE_GAP_PHY_CODED' in SDK15.2.0 \Example\ble_central\ble_app_uart_c. But I am not able to find 'm_scan_param'. Any idea how to update .scan_phys     = BLE_GAP_PHY_CODED in SDK15.2? 

[Vidar Berg]

I posted a modified version of ble_app_uart_c in this thread here: https://devzone.nordicsemi.com/f/nordic-q-a/40476/unable-to-convert-to-long-range-after-looking-at-umpteen-examples--/157300#157300. diff file is included in folder.