Discover how BLE bonding and RPA work, investigate repeated pairing issues on Android, and identify the root cause across Android and ESP32/NimBLE. Learn how IRK exchange, RPA resolution, and identity-based bond storage ensure reliable reconnections.

This article was written with the assistance of AI and reviewed by our engineering team.

BLE bonding and RPA handling in firmware for reliable device identification and connection management.

BLE RPA & Identity: Behind Reliable Bonding

The problem: BLE bonding can fail when temporary RPA addresses are not handled correctly.

The solution: BLE bonding uses identity keys and addresses to recognise devices across connections.

The result: Handle RPA resolution and store bonds using the peer’s identity address.

The takeaway: Reliable BLE bonding requires proper identity-key exchange and RPA handling.

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