tedge-dot 0.0.20

Two interchangeable packages, one binary: tedge-dot-c (C, the default: small, a glibc 2.17
floor, every protocol including the PROFIBUS-DP preview) and tedge-dot-rs (Rust, for the few features
only it has). Whether both remain in the final product is not decided yet; configs and flows work
with either. Install one of them from the thin-edge.io community repository:

sudo apt-get install -y tedge-dot-c    # or tedge-dot-rs

Install & upgrade guide
· README
· Changelog
· SHA256SUMS covers every asset below.

This release also delivers 0.0.19, which was tagged but never published.

Highlights

OPC UA structured values in the default package (tedge-dot-c)

The C build now reads OPC UA structured values, as the Rust build does since the previous release.
You no longer need tedge-dot-rs to read one field of an ExtensionObject. See
doc/connectors/opcua-connector-spec.md §3.7.

• address.field selects a field of a structure (Motor.Current, Items[1].Value), decoded with
  the DataTypeDefinition the server publishes.
• address.index selects one element of an array variable.
• A mode = "raw" point on a structure publishes the encoded body, with addr.encoding_id and
  addr.data_type.
• DateTime, LocalizedText, StatusCode, Guid, NodeId, ExpandedNodeId and QualifiedName values are
  read as string (DateTime also as int64, StatusCode also as uint32).

Configurations that used field or index with the C build loaded before but gave bad samples.
They now give values, with no change to the configuration.

The C build keeps its fixed value sizes: a raw structure body longer than 256 bytes and a bytes
value longer than 127 bytes are bad samples that name the limit, and string values are cut at
255 bytes, as other C string values are.

---

0.0.20 (2026-11-11)

Bug Fixes

• ignore .zig-cache again (#119) (ee79901)

0.0.19 (2026-11-11)

Features

• opcua: structured values in the C build (opcua-structures-c) (#112) (ed813af)