RE: Advertising data

Giovanni — Thu, 15 Jan 2015 18:28:18 GMT

Thank you for your reply.

if I have more sensors can I create custom services? for example instead of BLE_UUID_HEALTH_THERMOMETER_SERVICE

BLE_UUID_AMBIENT_LIGHT_SERVICE

or BLE_UUID_X_MOTION_SERVICE?

how can i do this?

and how many service can i put in the advartising packet?

can i make something like this?

ble_advdata_t advdata;
uint8_t       flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;

ble_advdata_service_data_t service_data[6];


service_data[5].service_uuid = BLE_UUID_X_MOTION_SERVICE;
service_data[5].data.size    = sizeof(X_MOTION);
service_data[5].data.p_data  = &X_MOTION;

service_data[4].service_uuid = BLE_UUID_Y_MOTION_SERVICE;
service_data[4].data.size    = sizeof(Y_MOTION);
service_data[4].data.p_data  = &Y_MOTION;

service_data[3].service_uuid = BLE_UUID_AMBIENT_LIGHT_SERVICE;
service_data[3].data.size    = sizeof(LUMEN);
service_data[3].data.p_data  = &LUMEN;

service_data[2].service_uuid = BLE_UUID_BATTERY_SERVICE;
service_data[2].data.size    = sizeof(battery_data);
service_data[2].data.p_data  = &battery_data;

service_data[1].service_uuid = BLE_UUID_HEALTH_THERMOMETER_SERVICE;
service_data[1].data.size    = sizeof(temperature_data);
service_data[1].data.p_data  = (uint8_t *) &temperature_data;

service_data[0].service_uuid = BLE_UUID_OBJECT_TEMPERATURE;
service_data[0].data.size    = sizeof(OBJ);
service_data[0].data.p_data  = (uint8_t *) &OBJ;


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

advdata.name_type            = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance   = false;
advdata.flags.size           = sizeof(flags);
advdata.flags.p_data         = &flags;
advdata.service_data_count   = 6;
advdata.p_service_data_array = service_data;

err_code = ble_advdata_set(&advdata, NULL);

thanks for your patience

RE: Advertising data

Stefan Birnir Sverrisson — Thu, 15 Jan 2015 15:18:29 GMT

Actually, the example code is transmitting uint32_t temperature_data. You can try to define

uint32_t temperature_data = 0x12345678;

instead of

uint32_t temperature_data = temperature_data_get();

to see how the uint32_t data appears on your central device. Then you just need to assemble your custom uint32_t data the right way on the central side.

Update 19.1.2014 To advertise any custom data, use "Manufacturer Specific Data" advertising type. This thread and this thread describe it pretty well it seems. To advertise service data with UUID defined by Bluetooth SIG, use "Service Data" advertising type.