ioBroker.dnp3

DNP3 (IEEE 1815) over TCP adapter for ioBroker. It can operate as either:

• a master (TCP client), polling an external DNP3 outstation and exposing received measurements as ioBroker states;
• an outstation (TCP server), exposing configured ioBroker states to a DNP3 master.

Configuration

Select the operating mode and configure the TCP endpoint plus the local and remote 16-bit DNP3 link addresses. TCP port 20000 is the conventional default. In master mode, an integrity poll runs after connecting and at the configured interval. Received points are discovered and created below points.<type>.<index>.

In outstation mode, add the points that should be exposed. Writes to their ioBroker states update the outstation database.

Supported measurements

• Binary and double-bit binary inputs
• Binary output status
• Counters and frozen counters
• Analog inputs and analog output status
• Static and common event variations, including absolute timestamps
• Class 0/1/2/3 integrity polling and unsolicited-response confirmation

The first release uses DNP3 over plain TCP. TLS and Secure Authentication are not enabled yet.

Changelog

0.0.3 (2026-07-14)

• Publish tested builds as GitHub releases while npm publishing is not configured.

0.0.2 (2026-07-14)

• Persist automatically discovered DNP3 points in the Admin configuration table so their names and metadata can be edited.
• Allow polling intervals down to 250 ms and use 1000 ms as the default for new instances.

0.0.1 (2026-07-14)

• Initial DNP3 master and outstation implementation.

Older release notes are available in CHANGELOG_OLD.md.

License

Copyright (c) 2026 TheBam1990

MIT License.