Simple direct advertising

[clementfumey]

Hello,

I'am trying to do directed advertisement with NRF51822 (Smart Beacon Kit pca20006). I don't have any previous connection with peer, its address is hard-coded. The goal is to hide advertisement to others and not to connect with the peer (the ultimate goal would be to have something like describe in the privacy message sequence charts of S132 but with S130)

I have tried to modified the "ble_app_beacon" example from SDK12 with S130 softdevice. Here is the modification I did :

ble_gap_addr_t     peer_addr = {BLE_GAP_ADDR_TYPE_PUBLIC,{0x19,0x75,0xAE,0xEB,0x27,0xB8}};

// B8:27:EB:AE:75:19 => RPi 

memset(&m_adv_params, 0, sizeof(m_adv_params));

m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_DIRECT_IND;
m_adv_params.p_peer_addr = &peer_addr; 
m_adv_params.fp          = BLE_GAP_ADV_FP_ANY;
m_adv_params.interval    = 0;
m_adv_params.timeout     = 0;

These are the only modifications I did (there is still the "p_manuf_specific_data" in the "ble_advdata_t" field.) When I flash the beacon, I don't have the red led blinking (like it was without modification) and can't see any advertising. I am doing something wrong? Would you recommend to use the ble_advertising module instead?

[clementfumey]

I don't want to connect to a central. The central just scan for advertisement and take decision weither or not a peripheral is advertising or not. There is no other ble exchance the only information I want is : Is this beacon advertising or not?. I want to use low duty cycle directed advertisement(but put high duty cycle here in the example for the sake of simplicity) to avoid people with a smartphone to see this advertisements.