Creating service and characteristic with 128 bit UUID

[sankharay]

Hi
I am trying to create a service and characteristic with 128 bit UUID. I am using gatt_server_service_table_demo (in table services and characteristic are 16 bit in example code) . I have changed the service to 128 bit in gatt tab but after that service is not getting discovered. Please let me know how I can declare services and characteristic with 128 bit UUID or I have to use esp_ble_gatts_create_service function.

[sankharay]

Hi
as I told I am not able to create services and characteristic of 128 bit UUID by declaring gatt_db array for example I am using a 128 bit service as below

// Service Declaration
[IDX_SVC] =
{{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_128, (uint8_t *)service_uuid, ESP_GATT_PERM_READ,
ESP_UUID_LEN_128, sizeof(service_uuid), (uint8_t *)service_uuid}}

service_uuid contains 128 bit UUID in an array.
Which is not working. Please let me know the correct way to declare 128 bit UUID

[Karim1993]

Any Update On this ???

[chegewara]

Here you have nice tutorial with info you need:
https://github.com/espressif/esp-idf/bl ... bute-table

You changed this initialization too much:

Code: Select all

[IDX_SVC] =
{{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_128, (uint8_t *)service_uuid, ESP_GATT_PERM_READ,
ESP_UUID_LEN_128, sizeof(service_uuid), (uint8_t *)service_uuid}}

(uint8_t *)&primary_service_uuid: UUID to identify the service as a primary one (0x2800).