beacon example error with nRF52840

[Andrea_Furlani]

Hello,

I am using the ble_app_beacon example on a nRF52840 dongle.

Without changing the code I am able to load  and use it on my dongle. 

Now, I am trying to add some info to the beacon just to make some tests and in particular I am tring to give it a name like "TEST".

In order to do this, I defined it at the beginning of the main.c file with the other informations:

#define APP_DEVICE_NAME                 "TEST"

#define APP_BLE_CONN_CFG_TAG            1                   
#define NON_CONNECTABLE_ADV_INTERVAL    MSEC_TO_UNITS(100, UNIT_0_625_MS)  /**< The advertising interval for non-connectable advertisement (100 ms). This value can vary between 100ms to 10.24s). */

#define APP_BEACON_INFO_LENGTH          0x17                               /**< Total length of information advertised by the Beacon. */
#define APP_ADV_DATA_LENGTH             0x15                               /**< Length of manufacturer specific data in the advertisement. */
#define APP_DEVICE_TYPE                 0x02                               /**< 0x02 refers to Beacon. */
#define APP_MEASURED_RSSI               0xC3                               /**< The Beacon's measured RSSI at 1 meter distance in dBm. */
#define APP_COMPANY_IDENTIFIER          0x0059                             /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */
#define APP_MAJOR_VALUE                 0x01, 0x02                         /**< Major value used to identify Beacons. */
#define APP_MINOR_VALUE                 0x03, 0x04                         /**< Minor value used to identify Beacons. */
#define APP_BEACON_UUID                 0x01, 0x12, 0x23, 0x34, \
                                        0x45, 0x56, 0x67, 0x78, \
                                        0x89, 0x9a, 0xab, 0xbc, \
                                        0xcd, 0xde, 0xef, 0xf0            /**< Proprietary UUID for Beacon. */

Then, I added it to the m_beacon_info function:

static uint8_t m_beacon_info[APP_BEACON_INFO_LENGTH] =                    /**< Information advertised by the Beacon. */
{
    APP_DEVICE_NAME,     // Name of the device
    APP_DEVICE_TYPE,     // Manufacturer specific information. Specifies the device type in this
                         // implementation.
    APP_ADV_DATA_LENGTH, // Manufacturer specific information. Specifies the length of the
                         // manufacturer specific data in this implementation.
    APP_BEACON_UUID,     // 128 bit UUID value.
    APP_MAJOR_VALUE,     // Major arbitrary value that can be used to distinguish between Beacons.
    APP_MINOR_VALUE,     // Minor arbitrary value that can be used to distinguish between Beacons.
    APP_MEASURED_RSSI    // Manufacturer specific information. The Beacon's measured TX power in
                         // this implementation.
};

By doing this, I get the following error at the beginning of the file, where I defined all the variables:

How can I solve this in order to display the beacon name or customize the displayed information?

I already tried to change APP_BEACON_INFO_LENGTH but it didn't work.

Thanks for the help.

[Andrea_Furlani]

Yes, I am using SDK 17.0.2.

I am using this example because I need to progam the dongle to send and receive data in broadcast mode and this is useful to understand how receive data.

[Edvin]

Hello,

I recommend that you get hold of a DK for development. The reason for this is that you can't debug using the nRF52840 dongle, and debugging is a really useful tool while developing. Development without being able to monitor the logs or stepping through the code is pretty much blind development. 

However, if you intend to both send and receive, I will recommend you to use one of the other examples that use the advertising module. This may not make sense because you would think that this example already does this, but it isn't. Check out the examples ble_app_uart and how it sets up its advertisement, and then check out ble_app_uart_c for an example that is scanning.

BR,

Edvin

[Edvin]

I found the link that I was looking for earlier:

This list shows the list of advertising packet fields.

Advertising packets are built up by several chunks, and each chunk consists of:

[length], [type], [payload]

All the data in m_beacon_info in the ble_app_beacon example is added to the type 

0xFF "Manufacturer Specific Data".

Hence, any name you put inside this will not be added as it's own chunk with type:

0x09 "Complete Local Name".

BR,

Edvin