feat: initial scaffold and profiles for Schneider iEM2135, LUG heat meter v4

Seed the repo described in pda-fieldbus ADR-0009: a sibling repo that
ships device profiles independently of the fieldbus binary.

Layout:
- profiles/schneider-iem2135.json    — distilled from the inline extract
                                       rules in examples/poll-d27-g110.yaml
- profiles/lug-heat-meter-v4.json    — heat-meter profile with derived
                                       delta_temperature

Both validate against pda-fieldbus's profile.LoadDirs.

Packaging:
- nfpm.yaml builds pda-fieldbus-profiles.deb installing profiles/ to
  /usr/share/pda-fieldbus/profiles/, where the loader's DirPackaged dir
  picks them up. Recommends pda-fieldbus.
- .gitea/workflows/auto-tag.yml: same conventional-commit auto-tagging
  as pda-fieldbus, on tag push installs nfpm, builds .deb, uploads to
  repo.pda.cz/PDAT/main using the existing PDA_REPO_TOKEN secret.
- .gitea/workflows/ci.yml: JSON syntax check + schema validation by
  importing pda-fieldbus's loader and calling LoadDirs against profiles/.

.gitea/workflows/auto-tag.yml

@@ -0,0 +1,96 @@
+name: Auto Tag
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+
+jobs:
+  tag:
+    runs-on: ubuntu-latest
+    outputs:
+      new_tag: ${{ steps.bump.outputs.new_tag }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Determine version bump and create tag
+        id: bump
+        run: |
+          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+          echo "Latest tag: $LATEST_TAG"
+
+          COMMITS=$(git log "${LATEST_TAG}..HEAD" --pretty=format:"%s" 2>/dev/null)
+          if [ -z "$COMMITS" ]; then
+            echo "No new commits since ${LATEST_TAG}, skipping."
+            exit 0
+          fi
+
+          BUMP=""
+          if echo "$COMMITS" | grep -qiE "^[a-z]+(\(.+\))?!:|BREAKING CHANGE"; then
+            BUMP="major"
+          elif echo "$COMMITS" | grep -qiE "^feat(\(.+\))?:"; then
+            BUMP="minor"
+          elif echo "$COMMITS" | grep -qiE "^fix(\(.+\))?:"; then
+            BUMP="patch"
+          fi
+
+          if [ -z "$BUMP" ]; then
+            echo "No conventional commit triggers, skipping."
+            exit 0
+          fi
+
+          VERSION="${LATEST_TAG#v}"
+          MAJOR=$(echo "$VERSION" | cut -d. -f1)
+          MINOR=$(echo "$VERSION" | cut -d. -f2)
+          PATCH=$(echo "$VERSION" | cut -d. -f3)
+
+          case "$BUMP" in
+            major) MAJOR=$((MAJOR + 1)); MINOR=0; PATCH=0 ;;
+            minor) MINOR=$((MINOR + 1)); PATCH=0 ;;
+            patch) PATCH=$((PATCH + 1)) ;;
+          esac
+
+          NEW_TAG="v${MAJOR}.${MINOR}.${PATCH}"
+          echo "Creating tag: $NEW_TAG"
+
+          git tag "$NEW_TAG"
+          git push origin "$NEW_TAG"
+          echo "new_tag=$NEW_TAG" >> "$GITHUB_OUTPUT"
+
+  release:
+    needs: tag
+    if: needs.tag.outputs.new_tag != ''
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.tag.outputs.new_tag }}
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.25"
+          cache: false
+
+      - name: Install nfpm
+        run: go install github.com/goreleaser/nfpm/v2/cmd/nfpm@v2.41.3
+
+      - name: Build .deb
+        run: |
+          VER="${{ needs.tag.outputs.new_tag }}"
+          VER="${VER#v}"
+          mkdir -p dist
+          VERSION="$VER" nfpm pkg --packager deb --target dist/ -f nfpm.yaml
+          ls -la dist/
+
+      - name: Publish .deb to repo.pda.cz
+        run: |
+          for deb in dist/*.deb; do
+            echo "Uploading $deb"
+            curl --fail -X POST https://repo.pda.cz/api/v1/PDAT/main/upload \
+              -H "Authorization: Bearer ${{ secrets.PDA_REPO_TOKEN }}" \
+              -F "file=@${deb}"
+          done

.gitea/workflows/ci.yml

@@ -0,0 +1,60 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.25"
+          cache: false
+
+      - name: JSON syntax check
+        run: |
+          for f in profiles/*.json; do
+            echo "checking $f"
+            python3 -m json.tool "$f" > /dev/null
+          done
+
+      - name: Schema validation via pda-fieldbus loader
+        working-directory: ${{ runner.temp }}
+        run: |
+          mkdir -p validator && cd validator
+          go mod init validator
+          go get github.com/pdat-cz/pda-fieldbus@latest
+          cat > main.go <<'EOF'
+          package main
+
+          import (
+              "fmt"
+              "os"
+
+              "github.com/pdat-cz/pda-fieldbus/pkg/proto/profile"
+          )
+
+          func main() {
+              if len(os.Args) != 2 {
+                  fmt.Fprintln(os.Stderr, "usage: validator <profiles-dir>")
+                  os.Exit(2)
+              }
+              m, err := profile.LoadDirs(os.Args[1])
+              if err != nil {
+                  fmt.Fprintln(os.Stderr, "FAIL:", err)
+                  os.Exit(1)
+              }
+              for n, p := range m {
+                  fmt.Printf("OK %s  device=%s/%s  points=%d  derived=%d\n",
+                      n, p.Device.Manufacturer, p.Device.Model,
+                      len(p.Points), len(p.Derived))
+              }
+          }
+          EOF
+          go run . "$GITHUB_WORKSPACE/profiles"

.gitignore

@@ -0,0 +1,4 @@
+/dist/
+/.cache/
+*.deb
+*.tar.gz

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 PDA Servers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -0,0 +1,12 @@
+VERSION ?= 0.0.0-dev
+
+.PHONY: package clean
+
+# Build a .deb at $(VERSION). Requires nfpm in PATH.
+# Example: make package VERSION=0.1.0
+package:
+	mkdir -p dist
+	VERSION=$(VERSION) nfpm pkg --packager deb --target dist/ -f nfpm.yaml
+
+clean:
+	rm -rf dist/

README.md

@@ -0,0 +1,61 @@
+# pda-fieldbus-profiles
+
+Reusable device profiles for [pda-fieldbus](https://git.pda.cz/PDAT/pda-fieldbus).
+
+A device profile is a JSON description of one device model: which
+DIF/VIF records to read on M-Bus (or which registers on Modbus), what
+units they have, how to scale them, and any derived values to compute
+from them. Profiles let `pda-fieldbus poll` configurations stay short
+(`profile: schneider-iem2135`) instead of repeating extract rules per
+deployment.
+
+See `pda-fieldbus` ADR-0009 and spec PDA-0010 for the full schema and
+loader semantics.
+
+## Layout
+
+```
+profiles/
+  schneider-iem2135.json
+  lug-heat-meter-v4.json
+  ...
+```
+
+Each file is one profile. The filename stem is the profile name
+referenced from a poll config (`profile: schneider-iem2135`).
+
+## Installation
+
+The `pda-fieldbus-profiles` `.deb` installs files to:
+
+```
+/usr/share/pda-fieldbus/profiles/
+```
+
+The `pda-fieldbus` loader scans that directory plus
+`/etc/pda-fieldbus/profiles.d/` (operator overrides — wins on filename
+collision). To override a packaged profile on one box, copy it to the
+operator dir and edit there; the package will not overwrite it.
+
+## Adding a profile
+
+1. Create `profiles/<name>.json` following an existing profile.
+2. Validate it loads against the current `pda-fieldbus` loader:
+   ```
+   pda-fieldbus poll --config <some.yaml> --profile-dir ./profiles --dry-run
+   ```
+3. Open a PR. Use a `feat:` commit (`feat: add <vendor>-<model> profile`).
+   The `feat:` prefix triggers a minor version bump and a release of the
+   `.deb` to repo.pda.cz.
+
+## Conventional commits
+
+Same convention as `pda-fieldbus`:
+
+- `feat:` — new profile (minor bump)
+- `fix:` — correction to an existing profile (patch bump)
+- `docs:`, `chore:`, `ci:` — no version bump
+
+## License
+
+MIT. See `LICENSE`.

nfpm.yaml

@@ -0,0 +1,28 @@
+# nfpm config — package profiles/ as /usr/share/pda-fieldbus/profiles/
+# Version is injected at build time:
+#   nfpm pkg --packager deb --target dist/ -f nfpm.yaml -v "$VERSION"
+
+name: pda-fieldbus-profiles
+arch: all
+platform: linux
+version: ${VERSION}
+section: contrib/utils
+priority: optional
+maintainer: p.d.a. <info@pda.cz>
+vendor: p.d.a.
+homepage: https://git.pda.cz/PDAT/pda-fieldbus-profiles
+license: MIT
+description: |
+  Device profiles for pda-fieldbus.
+  Reusable JSON descriptions of M-Bus and Modbus device models — points,
+  units, scaling, and derived values — consumed by pda-fieldbus poll
+  via `profile: <name>` references.
+
+contents:
+  - src: profiles/
+    dst: /usr/share/pda-fieldbus/profiles/
+    type: tree
+
+deb:
+  fields:
+    Recommends: pda-fieldbus

profiles/lug-heat-meter-v4.json

@@ -0,0 +1,54 @@
+{
+  "schema": "pda-fieldbus.profile/v1",
+  "device": {
+    "manufacturer": "LUG",
+    "model": "heat-meter-v4",
+    "protocol": "mbus"
+  },
+  "meta": {
+    "version": "1"
+  },
+  "points": {
+    "energy": {
+      "addr": "mbus/dif:0C/vif:0F",
+      "unit": "gigajoule",
+      "scale": 1e-9,
+      "dimensions": "energy",
+      "description": "Total heat energy"
+    },
+    "power": {
+      "addr": "mbus/dif:0B/vif:2D",
+      "unit": "kilowatt",
+      "scale": 0.001,
+      "dimensions": "power",
+      "description": "Instantaneous thermal power"
+    },
+    "flow_temperature": {
+      "addr": "mbus/dif:0A/vif:5B",
+      "unit": "celsius",
+      "dimensions": "temperature",
+      "description": "Supply (flow) temperature"
+    },
+    "return_temperature": {
+      "addr": "mbus/dif:0A/vif:5F",
+      "unit": "celsius",
+      "dimensions": "temperature",
+      "description": "Return temperature"
+    },
+    "volume_flow": {
+      "addr": "mbus/dif:0B/vif:3B",
+      "unit": "cubic_metre_per_hour",
+      "dimensions": "flow",
+      "description": "Volumetric flow rate"
+    }
+  },
+  "derived": {
+    "delta_temperature": {
+      "function": "sub",
+      "inputs": ["flow_temperature", "return_temperature"],
+      "unit": "celsius",
+      "dimensions": "temperature",
+      "description": "Flow minus return temperature"
+    }
+  }
+}

profiles/schneider-iem2135.json

@@ -0,0 +1,35 @@
+{
+  "schema": "pda-fieldbus.profile/v1",
+  "device": {
+    "manufacturer": "Schneider Electric",
+    "model": "iEM2135",
+    "protocol": "mbus"
+  },
+  "meta": {
+    "version": "1",
+    "references": [
+      "Schneider iEM2000 series user manual"
+    ]
+  },
+  "points": {
+    "current": {
+      "addr": "mbus/dif:05/vif:FD/vife:DC,FF,00",
+      "unit": "ampere",
+      "dimensions": "current",
+      "description": "Total current"
+    },
+    "power": {
+      "addr": "mbus/dif:05/vif:2E",
+      "unit": "watt",
+      "dimensions": "power",
+      "description": "Active power"
+    },
+    "energy": {
+      "addr": "mbus/dif:07/vif:03",
+      "unit": "kilowatt_hour",
+      "scale": 0.001,
+      "dimensions": "energy",
+      "description": "Total active energy import"
+    }
+  }
+}