Update github actions workflows

Author: stnkl

.github/workflows/arduino_lint.yml

@@ -0,0 +1,12 @@
+name: Arduino lint
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: arduino/arduino-lint-action@v1
+        with:
+          library-manager: update

.github/workflows/build.yml

@@ -1,9 +1,50 @@
+name: Build library
+
 on: [push, pull_request]
+
 jobs:
-  lint:
+  build:
+
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        board:
+          - "nodemcuv2"
+          - "lolin32"
+
     steps:
-      - uses: actions/checkout@v2
-      - uses: arduino/arduino-lint-action@v1
-        with:
-          library-manager: update
+    - uses: actions/checkout@v2
+    - name: Cache pip
+      uses: actions/cache@v2
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: ${{ runner.os }}-pip-
+    - name: Cache PlatformIO
+      uses: actions/cache@v2
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+    - name: Set up Python
+      uses: actions/setup-python@v2
+    - name: Install PlatformIO
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade platformio
+    - name: Install 3rd party dependencies
+      run: |
+        pio lib install \
+        ArduinoJson \
+        FastLED \
+        LinkedList \
+        WebSockets \
+        https://github.com/tzapu/WiFiManager \
+        https://github.com/stnkl/ESPEssentials
+    - name: Create main file
+      run: |
+        echo "#include <Arduino.h>" >> main.ino
+        echo "void setup() { }" >> main.ino
+        echo "void loop() { }" >> main.ino
+    - name: Run PlatformIO
+      run: pio ci --board=${{ matrix.board }} .

.github/workflows/build_examples.yml

@@ -0,0 +1,52 @@
+name: Build examples
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        board:
+          - "nodemcuv2"
+          - "lolin32"
+        example:
+          - "examples/BasicExample/BasicExample.ino"
+          - "examples/ColorPickers/ColorPickers.ino"
+          - "examples/Sliders/Sliders.ino"
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Cache pip
+      uses: actions/cache@v2
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: ${{ runner.os }}-pip-
+    - name: Cache PlatformIO
+      uses: actions/cache@v2
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+    - name: Set up Python
+      uses: actions/setup-python@v2
+    - name: Install PlatformIO
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade platformio
+    - name: Install 3rd party dependencies
+      run: |
+        pio lib -g install \
+        ArduinoJson \
+        FastLED \
+        LinkedList \
+        WebSockets \
+        https://github.com/tzapu/WiFiManager \
+        https://github.com/stnkl/ESPEssentials \
+        https://github.com/stnkl/FastLEDHub
+    - name: Run PlatformIO examples
+      run: pio ci --board=${{ matrix.board }}
+      env:
+        PLATFORMIO_CI_SRC: ${{ matrix.example }}