Achieving Reliable Firmware Updates in the Field

Overview

Developing a robust remote update mechanism for connected devices operating over constrained networks.

Technologies

Firmware | Bootloaders | IoT | Embedded systems

Define the Problem

Remote devices required firmware updates over very low data-rate communication links, where interruptions could occur at any time.

Diagnose the Root Cause

Traditional update approaches risked incomplete installations and device failure if communication was interrupted.

Key engineering challenges included:

• Very low bandwidth links

• Risk of interrupted transfer

• Remote deployment locations

• Long-term maintainability

Deliver the Solution

We developed a dual-image bootloader with rollback capability and optimised transfer methods to safely support remote updates.

Key Outcomes

• Reliable remote update capability

• Eliminated risk of device bricking

• Scalable fleet management

• Long-term supportability improved