srdata.uuids_complete.p_uuids pointer for multiple services

[talha]

If I have multiple services, 2 for example, how should I set up the srdata.uuids_complete.p_uuids in the code:

ble_advdata_t srdata; memset(&srdata, 0, sizeof(srdata)); srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]); srdata.uuids_complete.p_uuids = m_adv_uuids;

Can I use the following:

m_adv_uuids[] = {{BLE_UUID_XX_SERVICE_UUID, BLE_UUID_TYPE_VENDOR_BEGIN }, {BLE_UUID_TEMPERATURE_SERVICE_UUID, BLE_UUID_TYPE_VENDOR_BEGIN}};

[Petter Myhre]

The scan response can contain 31 bytes of data. The header is 2 bytes, so you can have 29 bytes of UUID in there.

You are trying to put in two 128-bit UUIDs, which totals in 32 bytes. So this is not possible.

Is it necessary to include both? Maybe one is enough to identify the device?

[talha]

It is not necessary, the program is adequately doing what I want. I was just curious about creating two services.

What else I can do to create two different services? It is possible, right?

[Petter Myhre]

The service UUID you put into the advertisment is just one way of telling scanners what kind of device you are. You can have many different services on the actual device, they don't all have to be included in the advertisment.

[talha]

Sorry if I sound ignorant but if they are not included in advertisement, how else can I use my services to send data to another device?

[Petter Myhre]

The advertisment is not used after connection is established, a central can use the advertisement to search for a device with a certain service UUID. It could search for something else, for example a device name instead. The device could still have services implemented, the services will only be used after connection is established.