How can I use a vendor specific UUID?

Question

When I try to make a custom service with the S110, how do I set the service and characteristics up to use a custom 128-bit UUID instead of a 16-bit one, based on the Bluetooth SIG base?

Ole Morten · Accepted Answer

Using a vendor specific UUID is basically a two-step process: 
 
 Add your custom base UUID to the stack by using sd_ble_uuid_vs_add(). Store the value returned to you in the p_type parameter of this function call. 
 Set the type of all ble_uuid_t-s that should use this base to the value returned to you from sd_ble_uuid_vs_add(). When you set this field to your custom type instead of to BLE_UUID_TYPE_BLE, the value will be used on top of the custom base UUID you specified instead of on top of the Bluetooth SIG base. 
 
 Behind the scenes, sd_ble_uuid_vs_add() will add the base UUID to the softdevice's internal list of base UUIDs, and return the table index for this UUID in the type field. When using the type in a ble_uuid_t later, the softdevice can look up the base used in this same table by using this index. 
 I've also attached a small pseudo-code snippet that shows the essentials of this scheme. 
 add_custom_uuid.c

How can I use a vendor specific UUID?

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