Please check out the Bluetooth Low Energy Advertisements blog post here, where BLE advertising is explained in detail. the ble_app_beacon only advertises its initial advertisement on the Primary advertising channels (37, 38, and 39). The other channels are known as Secondary advertisement channels and are used as "auxiliary" channels, meaning that a device has to first advertise on the primary advertising channels before sending out advertising packets on these secondary channels.
Please check out the Bluetooth Low Energy Advertisements blog post here, where BLE advertising is explained in detail. the ble_app_beacon only advertises its initial advertisement on the Primary advertising channels (37, 38, and 39). The other channels are known as Secondary advertisement channels and are used as "auxiliary" channels, meaning that a device has to first advertise on the primary advertising channels before sending out advertising packets on these secondary channels.
