Bootloader and OTA firmware development
Bootloaders and OTA updates for embedded products that must be updated in a controlled way. Work covers firmware signing, rollback, partitions, diagnostics, recovery and release procedures.
Update without putting the product at risk
A firmware update is not just a file transfer. It must handle interruptions, wrong versions, corrupted images, rollback, logs and field support.
- Bootloaders for MCUs, ESP32, STM32, embedded Linux systems or mixed architectures.
- Firmware signing, integrity checks, versioning and compatibility policies.
- Dual-bank OTA, staged updates, rollback and recovery mode.
- Update logs and procedures for technical support and production.
What it includes
Startup sequence, image validation, fallback and error handling.
Signing, verification, keys, anti-rollback and reduced unauthorized update risk.
Power loss, incomplete packages, incompatible versions and recovery scenarios.
Build process, changelog, tests, rollout and post-update diagnostics.
Working method
- Review goals, constraints, existing code, systems and business priorities.
- Define risks, architecture, measurable checkpoints and an execution plan.
- Implement or debug in verifiable steps on real data, code or hardware.
- Deliver code, documentation and decisions the team can maintain and evolve.
Related guides and pages
Complete firmware architecture for reliable products.
Protect firmware and the boot chain.
Technical guide to update and rollback architecture.
Frequently asked questions
Can OTA be added to existing firmware?
Yes, after checking memory, partitions, boot flow, connectivity and security constraints.
Is rollback always required?
Not always, but it is valuable when devices are in the field and manual recovery is expensive.