Continuous integration (#6)

* CI Github workflow for Arduino and PlatformIO

Build the project using the current PlatformIO and Arduino
development environments on every push and pull request.

The Arduino build installs all of the dependencies manually before
building the sketch.

The PlatformIO build installs all dependencies automatically before
building the debug and release builds of the project.

The README is updated to add a status badge to allow the continuous
integration status to be seen easily.

* Remove version restriction on ArduinoJson

With the changes in fe6f190 to update the code to
support ArduinoJson 7 the version restriction is no
longer required.

Author: davefiddes

.github/workflows/ci.yml

@@ -0,0 +1,74 @@
+name: Continuous Integration
+
+on: [push, pull_request]
+
+jobs:
+  arduino:
+    name: Arduino
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - core: esp32:esp32
+            board: esp32:esp32:esp32
+            softwareserial: false
+            index_url: https://espressif.github.io/arduino-esp32/package_esp32_index.json
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install arduino-cli
+        run: curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=/usr/local/bin sh
+
+      - name: Update core index
+        run: arduino-cli core update-index --additional-urls "${{ matrix.index_url }}"
+
+      - name: Install core
+        run: arduino-cli core install --additional-urls "${{ matrix.index_url }}" ${{ matrix.core }}
+
+      - name: Install ESP32Time library
+        run: arduino-cli lib install ESP32Time
+
+      - name: Install RTClib library
+        run: arduino-cli lib install RTClib
+
+      - name: Install ArduinoJson library
+        run: arduino-cli lib install ArduinoJson
+
+      - name: Install StreamUtils library
+        run: arduino-cli lib install StreamUtils
+
+      - name: Build esp32-web-interface
+        run: arduino-cli compile --library . --warnings all -b ${{ matrix.board }} "esp32-web-interface.ino"
+
+  platformio:
+    name: PlatformIO
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.platformio
+            ~/.cache/pip
+          key: ${{ runner.os }}-platformio
+
+      - name: Set up Python 3.x
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+
+      - name: Install PlatformIO
+        run: pip install platformio
+
+      - name: Build release esp32-web-interface
+        run: platformio run -e release
+
+      - name: Build debug esp32-web-interface
+        run: platformio run -e debug

README.md

@@ -2,24 +2,28 @@ esp32-web-interface
 =====================
 Web interface for Huebner inverter
 
+[![Build status](../../actions/workflows/ci.yml/badge.svg)](../../actions/workflows/ci.yml)
+
 # Table of Contents
 <details>
  <summary>Click to open TOC</summary>
 <!-- MarkdownTOC autolink="true" levels="1,2,3,4,5,6" bracket="round" style="unordered" indent="    " autoanchor="false" markdown_preview="github" -->
 
+- [esp32-web-interface](#esp32-web-interface)
+- [Table of Contents](#table-of-contents)
 - [About](#about)
 - [Usage](#usage)
-    - [Wifi network](#wifi-network)
-    - [Reaching the board](#reaching-the-board)
+  - [Wifi network](#wifi-network)
+  - [Reaching the board](#reaching-the-board)
 - [Hardware](#hardware)
 - [Firmware](#firmware)
 - [Flashing / Upgrading](#flashing--upgrading)
-    - [Wirelessly](#wirelessly)
-    - [Wired](#wired)
+  - [Wirelessly](#wirelessly)
+  - [Wired](#wired)
 - [Documentations](#documentations)
 - [Development](#development)
-    - [Arduino](#arduino)
-    - [PlatformIO](#platformio)
+  - [Arduino](#arduino)
+  - [PlatformIO](#platformio)
 
 <!-- /MarkdownTOC -->
 </details>