Over-the-Air (OTA) Update

An over-the-air update is the remote delivery and installation of new firmware, software or configuration on deployed devices through a network connection, allowing fixes, security patches and features to be applied without physical access.

An OTA system includes an update server that hosts signed images and manages campaigns, a secure transport to the device, and an update agent on the device that downloads, verifies and installs the update. Robust designs use dual partitions, often called A/B, so that the new image is written alongside the running one and the device switches only after verification, rolling back automatically if the new version fails to start. Delta updates send only the differences between versions to save bandwidth.

OTA updates keep large fleets of IIoT sensors, gateways, edge computers and connected machines secure and functional across long service lives, avoiding costly site visits. Security patches are especially important for internet-connected devices, and regulations such as the EU Cyber Resilience Act place obligations on manufacturers to handle vulnerabilities in products with digital elements.

Updates must be cryptographically signed and verified on the device, ideally anchored in secure boot, so that only authentic firmware runs. Staged rollouts, compatibility checks, battery and power safeguards and clear rollback paths reduce the risk of disabling devices. On industrial equipment, updates should be scheduled with operations, since restarts can interrupt production, and changes to controllers must follow OEM guidance and site change control. The IETF SUIT working group has described a firmware update architecture for constrained devices in RFC 9019.

Key points

Delivers firmware and software updates remotely to deployed devices
Signed images are verified on the device before installation
A/B partitions enable automatic rollback after a failed update
Staged rollouts reduce the risk of fleet-wide failures
Industrial updates must be scheduled with operations and change control

Where AiVibe comes in

AiAmbA IoT is AiVibe's edge protocol layer: it discovers devices and normalises industrial signals, with supported protocols including Siemens S7, Mitsubishi MC, Delta Modbus, OPC UA and MQTT, and driver availability confirmed per installation. Writes to machines are deny-by-default.

Explore AiVibe’s work in Industrial IoT & Edge →

Related terms

Terms that refer to Over-the-Air (OTA) Update

LTE-M (LTE-MTC)Industrial IoT & Edge