Toggle 1Mbit PHY and CodedPHY

[saka4849]

Hi.

I want to advertise switching 1Mbit PHY and CodedPHY every 5 seconds.

I designed it like this based on nrf52 ble app uart long range example.

advertising_start(coded)-->5s-->BLE_GAP_TIMEOUT_SRC_ADVERTISING{advertising_start(1MbpsPHY)}-->5s
-->BLE_GAP_TIMEOUT_SRC_ADVERTISING{advertising_start(coded)}-->....

 

The code is as follows.

#define APP_ADV_TIMEOUT_IN_SECONDS  5


void advertising_start(void)
{
    static ble_gap_adv_params_t adv_params = {0};

    adv_params.properties.connectable = 1;
    // Setting up the scan response packet is currently not supported when using CODED phy
    adv_params.properties.scannable = 0;
    adv_params.properties.legacy_pdu = 0;
    adv_params.p_peer_addr   = NULL;
    adv_params.fp            = BLE_GAP_ADV_FP_ANY;
    adv_params.interval      = APP_ADV_INTERVAL;
    adv_params.duration      = APP_ADV_TIMEOUT_IN_SECONDS * 100;
    if(adv_coded){
        adv_params.primary_phy   = BLE_GAP_PHY_1MBPS;
        adv_params.secondary_phy = BLE_GAP_PHY_1MBPS;
        adv_coded = false;
    }
    else{
        adv_params.primary_phy   = BLE_GAP_PHY_CODED;
        adv_params.secondary_phy = BLE_GAP_PHY_CODED;
        adv_coded = true;
    }

    sd_ble_gap_adv_start(BLE_GAP_ADV_SET_HANDLE_DEFAULT, &adv_params, APP_BLE_CONN_CFG_TAG);
}

However, in my Xperia it was not displayed at 1Mbps PHY.
Is there anything else I need to change?

thanks

[Håvard]

Hi saka4849,

You say it does not display 1MBPS phy, and that CODED phy works. are you sure it was not the other way around? 1MBPS phy should definetly work. CODED may not be supported, depending on you phone. Also, I think the current android version will always use 1MBPS are primary phy, so it may fail to see your CODED advertising

Is your Xperia new? Are you sure it supports BLE5?

[saka4849]

Hi Håvard,

Thanks for your reply!

I'm also scanning with receiverfor Coded.
It has been received for 5 seconds and stopped for 5 seconds.

Yes, my Xperia is for 1 Mbps.
I want to receive alternately with Xperia and Coded receiver.

Thanks.

[Håvard]

Ok, so the coded receiver is a Nordic device? or another phone?

What sort of app are you using on the phone? nRF Connect?

Does the phone support Bluetooth Low Energy?

[saka4849]

Coded receiver is Nordic Device. (nRF52840 PDK)

My using App are nRF Connect and iBeaconDetector.
I always use them to confirm BLE.

Of course, it support.
It is displayed if it is an ordinary uart sample.

Thanks

[Håvard]

Are you sure your phone supports extended advertising? There are not many phones on the market that already support advertising extensions. I suspect this is the problem for your Xperia.

Also, if you are using the ble uart long range example from github that could mean you are using an alpha of the SoftDevice. If so, it could be wise to update to a production version.