First commit with entire first rendition of the project

.gitignore

@@ -0,0 +1,36 @@
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+dist/
+build/
+*.egg
+
+# Virtual environment
+venv/
+.venv/
+env/
+.env/
+
+# Config with secrets (API keys, MQTT credentials)
+config.yaml
+
+# Test & coverage
+.pytest_cache/
+.coverage
+htmlcov/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Generated by simulation mode
+spectra_last.png
+/tmp/spectra_last.png