IIoT Firmware Specification


This specification defines requirements for operational behavior, and interface specifications for firmware for Industrial Internet of Things (IIoT) sensor and effecter nodes. IIoT nodes that implement this specification are capable of self-reporting their capabilities to higher levels of the IIoT installation and provide a uniform data model for operational configuration and control.
In addition to operational requirements, this specification also provides guidance regarding a uniform process for configuring the firmware. These requirements are intended to facilitate integrators who wish to purchase sensors or effecters from one set of vendors and connect them to controller nodes from yet another set of vendors. Thus, this specification aims to enable both device operators as well as sensor integrators.
Although this specification is not targeted at a specific hardware platform, it has been written to support the IIoT Endpoint architecture defined by the PICMG IoT.0 (“MicroSAM”) standard. The MicroSAM standard defines a compact computing module through which vendors may create “smart sensors” within the Industrial Internet of Things (IIoT) application space.
PICMG IoT.2 addresses the data model and network architecture requirements for integration of Endpoints into larger sensor/effecter networks.
Section 2 of this document provides background information about the context in which PICMG IoT.2 compliant firmware is to be deployed. Section 3 provides information about the connection model and theory of operation for the sensor/effecter nodes. Sections 4 and 5 provide requirements regarding operational requirements and configuration requirements respectively.

Industry Objectives

  1. To enable sensor vendors to create smart sensors without having to manufacture the control circuitry and/or software by purchasing these components from PICMG-compliant suppliers
  2. To enable controller suppliers who wish to create smart sensors or smart-sensor components to do so in a way that is interoperable with other suppliers
  3. To enable sensor/effecter integrators to integrate sensors/effecters from multiple vendors with controllers from multiple vendors
  4. To accelerate the uptake of smart-sensor technology through open-specifications and interoperability

When combined with the PICMG sensor-domain network architecture and data model, sensors connected to MicroSAMs or other controller modules will seamlessly integrate into the network with plug-and-play interoperability.

Ratified: October 4, 2021
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