ELEC-C7222 Library Examples: Custom Service NOTIFY Example

This example demonstrates the minimal pattern for implementing a custom BLE service with a NOTIFY characteristic.

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Target

• example-ble-custom-service-notify

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Files

• libs/elec_c7222/examples/ble/custom-service-notify/main_ble_custom_service_notify.cpp
• libs/elec_c7222/examples/ble/custom-service-notify/app_profile.gatt

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What it demonstrates

• Defining a NOTIFY characteristic in a .gatt file
• Locating the characteristic by UUID
• Periodically updating the characteristic value
• Sending notifications to a subscribed client

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GATT layout

Custom vendor service: 0xFFD0

UUID	Name	Properties
0xFFD1	NotifyValue	READ + NOTIFY

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How to test (nRF Connect / LightBlue)

1. Connect to the device (c7222-notify-demo)
2. Open NotifyValue
3. Enable notifications (CCCD)
4. Observe periodic counter updates

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Notes

If notifications are not enabled on the client (CCCD not set), Notify() calls will typically have no effect.