Worked on the meshtastic/firmware repository to enhance MQTT configuration reliability within embedded systems. Focused on ensuring that MQTT settings persist even when the broker is unreachable, introducing a non-blocking advisory warning to inform users of connectivity issues without preventing configuration saves. Refactored the validation logic so that isValidConfig checks only TLS and default port correctness, while actual connectivity is managed asynchronously by the MQTT module’s reconnect loop. Added a lightweight TCP reachability check to verify broker accessibility without altering MQTT state. Utilized C++ and network programming skills to improve system stability, incorporating code reviews and collaborative feedback throughout.