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OpenLEADR - Friendly and compliant implementations of OpenADR 2.0b and OpenADR 3.1

OpenLEADR is an LF Energy project providing free and open source implementations of the Open Automated Demand Response (OpenADR) protocol – an industry standard for enabling energy flexibility across grids, devices, and services.

The project focuses on the development of openleadr-rs, a Rust based implementation of OpenADR 3.1 (referred to as OpenLEADR 3.1). The Python based implementation of OpenADR 2.0b is currently unmaintained.

Why OpenADR?

OpenADR is a widely adopted protocol for automated, standards-based demand response. It enables grid operators and utilities to communicate signals such as pricing, events, and capacity limits to energy-consuming devices and systems in real-time.

OpenADR is used globally to:

Reduce grid strain and balance load
Enable customer participation in energy markets
Integrate flexible, distributed energy resources
Support regulatory compliance for demand response programs

What’s New in OpenADR 3.1?

OpenADR 3.1 modernizes the protocol with significant improvements in usability, flexibility, and developer-friendliness:

RESTful architecture and JSON messaging make it simpler to implement and integrate
Maintains core OpenADR concepts (events, reports, etc.) while streamlining complexity
Easier adoption for VENs (Virtual End Nodes) with modular implementation options
Greater alignment with Common Information Model (CIM), facilitating broader interoperability

OpenLEADR 3.1, developed in Rust, provides a highly reliable, memory-safe platform for critical infrastructure.

Why Rust?

OpenLEADR 3.1 is built in Rust, a modern language known for safety, performance, and reliability – making it ideal for the high-assurance needs of grid infrastructure.

Benefits include:

Memory safety and secure execution
Easy deployment as portable, standalone binaries
Growing adoption across infrastructure and embedded systems communities

What’s Included in OpenLEADR 3.1?

OpenLEADR 3.1 provides:

A robust VTN (Virtual Top Node) and VEN (Virtual End Node) implementation
Support for CRUD operations on programs, events, reports, VENs, and resources
Authentication and authorization mechanisms
High test coverage (166 of 168 tests from the OpenADR Alliance suite pass)
Currently excludes support for the webhook mechanism (pending spec update)
VTN support for signalling via MQTT and WebSockets
VTN support for resource groups (to be standardized in OpenADR 3.2)

Use Cases

OpenADR 3.1, as implemented by OpenLEADR, enables diverse energy flexibility use cases:

Grid-Aware EV Charging: Dutch Distribution System Operators (DSOs) will use OpenADR 3.1 to send static and dynamic grid capacity profiles to Charge Point Operators (CPOs)
Dynamic Price Signals: Communicate time-sensitive pricing to end-user devices or systems
Load Management & DER Integration: Enable smarter orchestration of distributed assets in real time