Refactored code, unit tests added, GA activated.

.gitea/workflows/pio_tests.yml

@@ -0,0 +1,34 @@
+name: PlatformIO flow
+run-name: ${{ gitea.actor }} is testing
+
+on:
+  push:
+    branches:
+      - '*'
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+    - name: Configure caching
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.cache/pip
+          ~/.platformio/.cache
+        key: ${{ runner.os }}-pio
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 'pypy3.9'
+    - name: Install PlatformIO Core
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade platformio
+    - name: Run native unit tests
+      run: |
+        pio test