ELEC-C7222 Library Examples: Security Manager Example

This example demonstrates how the BLE Security Manager integrates with the GATT server and how encrypted characteristic access behaves in practice.

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Target

• example-ble-security-manager

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Files

• libs/elec_c7222/examples/ble/security-manager/main_ble_security_manager.cpp
• libs/elec_c7222/examples/ble/security-manager/app_profile.gatt

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What it demonstrates

• Enabling the Security Manager
• "Just Works" pairing configuration
• A secure characteristic (READ_ENCRYPTED) that fails before pairing and succeeds after pairing

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GATT layout

Custom vendor service: 0xFFF0

UUID	Name	Properties
0xFFF1	PublicValue	READ
0xFFF2	SecureValue	READ_ENCRYPTED

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How to test (nRF Connect / LightBlue)

1. Connect to the device (c7222-sec-demo)
2. Read PublicValue -> succeeds immediately
3. Read SecureValue -> fails before pairing and/or triggers pairing
4. Pair with the device ("Just Works")
5. Read SecureValue again -> succeeds

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Expected UART output

You should see:

• advertising started
• security events (pairing/encryption)
• normal GATT read logs from the characteristic handlers

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Notes

This example keeps the pairing configuration intentionally simple:

• IoCapability = NoInputNoOutput
• no MITM requirement

The secure behavior is enforced by the .gatt characteristic flags, not by application logic.