FOTA Listener

Overview

The FOTA (Firmware Over-The-Air) Listener is a backend service developed in Java to enable seamless firmware upgrades for tracking devices. Built using the Netty framework, it ensures reliable, real-time communication between the server and devices during the upgrade process.

My Role

As Lead Engineer and Architect, I was responsible for:
  • Designing the listener architecture using Java + Netty
  • Implementing secure, asynchronous firmware delivery
  • Managing device sessions and upgrade state tracking
  • Ensuring fault tolerance and retry mechanisms

Key Features

  • Real-time firmware upgrade delivery over TCP
  • Device session management and upgrade validation
  • Support for large firmware payloads with chunked delivery
  • Built-in retry and error handling for unstable connections

Technologies Used

  • Java: Core Language
  • Netty: High-performance networking framework
  • Custom Protocols: For device communication

Outcome

The listener enabled scalable, over-the-air firmware upgrades for thousands of devices in the field, reducing manual intervention and improving device lifecycle management.