OTA Update Pipeline
Download, authenticate, stage and confirm firmware without replacing the known-good image prematurely.
Arduino-compatible frameworks, ESP-IDF/FreeRTOS, PIC/AVR/STM32/RP-class systems; apply exact vendor documentation for the selected MCU.Architecture
Update manifest → candidate download → hash/signature verification → inactive slot → reboot test → confirm.
Security and recovery risks
- Use TLS plus signed images; TLS alone is insufficient.nPower loss at every stage must be recoverable.nNever overwrite the only known-good image.
Implementation procedure
- Check product, version, hardware and rollback policy.nDownload into inactive partition with timeouts.nVerify length, SHA-256 and signature before boot selection.nBoot candidate with a confirmation deadline.nConfirm only after mandatory self-tests pass.
Starter code / configuration
verify_manifest(); write_inactive_slot(); set_pending_boot(); reboot();Verification evidence
| Test | Expected | Evidence |
|---|---|---|
| Nominal boot | Correct version and hardware revision reported | Captured boot log |
| Fault recovery | Defined safe state and reset reason | Fault-injection record |
| Power cycle | No corrupt configuration or unsafe output | Repeated-cycle log |
Required release artifacts
- Versioned firmware binary and SHA-256
- Source revision / build identifier
- Board and hardware-revision compatibility list
- Test report and known limitations
- Recovery image and factory-reset procedure
- Provisioning/calibration schema
- Release approval record
Local browser tools
Firmware production workbench
A/B update exercise
OTA and automatic rollback simulator
Advance one validated stage at a time. A failed boot test returns the device to the previous slot.
- Running confirmed firmware from Slot A.
Release gate
Production-readiness checklist
A downloadable release decision is generated only after every mandatory control is confirmed.