diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..3119723
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,22 @@
+name: Build all boards
+on:
+  push:
+    branches:    
+      - master
+
+jobs:
+  main:
+    name: Build all boards
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Setup Python
+        uses: actions/setup-python@master
+        with:
+          python-version: '3.x'
+      - name: Install Platform IO
+        run: |
+          python -m pip install --upgrade pip
+          pip install -U platformio
+      - name: Build
+        run: platformio run -e esp32-a1s -e lolin32 -e lolin_d32 -e lolin_d32_pro -e nodemcu-32s -e az-delivery-devkit-v4 -e ttgo_t8
diff --git a/README.md b/README.md
index d2c68d9..3fbde5f 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 ## NEWS
 * EN: I've set up a primarily German-speaking community with much documentation. Also an international corner for non-German-speakers is available at https://forum.espuino.de. Github-Login can be used there but it's not necessary.
 * DE: Ich habe ein primär deutschsprachiges Forum aufgesetzt, welches ich mit reichlich Doku versehen habe. Würde mich freuen, euch dort zu sehen: https://forum.espuino.de. Ihr könnt euch dort mit eurem Github-Login einloggen, jedoch auch "normal" anmelden. Dokumenation findet ihr insbesondere hier: https://forum.espuino.de/c/dokumentation/anleitungen/10
+## Build status
+![build workflow](https://github.com/biologist79/ESPuino/actions/workflows/build.yml/badge.svg)
 ## Changelog
 Moved to [another location](changelog.md) as it became to prominent here. Only last three events are kept:
 * 26.02.2021: Shutdown via webgui is now available.
diff --git a/platformio.ini b/platformio.ini
index 4e141c3..199161a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -26,19 +26,19 @@ lib_deps_external =
 
 [env:common]
 platform = espressif32
-build_flags = -DHAL=1 -DHAL=3 -DHAL=4
 ; Don't forget to run this script if you changed the html-files provided in any way
 extra_scripts =
  pre:processHtml.py
 
 
-[env:esp32-a12]
+[env:esp32-a1s]
 platform = espressif32
 board = esp-wrover-kit
 framework = arduino
 monitor_speed = 115200
-board_build.partitions = huge_ap.csv
+board_build.partitions = huge_app.csv
 build_flags = -DHAL=2
+			  -DRFID_READER_TYPE_MFRC522_I2C
 			  -DBOARD_HAS_PSRAM
               -mfix-esp32-psram-cache-issue
 lib_deps =
@@ -56,6 +56,7 @@ board = lolin32
 framework = arduino
 monitor_speed = 115200
 board_build.partitions = huge_app.csv
+build_flags = -DHAL=1
 lib_deps =
 	${common.lib_deps_builtin}
 	${common.lib_deps_external}
@@ -74,6 +75,7 @@ board = lolin_d32
 framework = arduino
 monitor_speed = 115200
 board_build.partitions = huge_app.csv
+build_flags = -DHAL=3
 lib_deps =
 	${common.lib_deps_builtin}
 	${common.lib_deps_external}
@@ -100,7 +102,8 @@ lib_deps =
 extra_scripts = ${env:common.extra_scripts}
 upload_port = /dev/cu.wchusbserial1410
 monitor_port = /dev/cu.wchusbserial1410
-build_flags = -DBOARD_HAS_PSRAM
+build_flags = -DHAL=4
+              -DBOARD_HAS_PSRAM
               -mfix-esp32-psram-cache-issue
 platform_packages =
     platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#1.0.5-rc6
@@ -156,7 +159,8 @@ lib_deps =
 extra_scripts = ${env:common.extra_scripts}
 upload_port = /dev/cu.SLAB_USBtoUART
 monitor_port = /dev/cu.SLAB_USBtoUART
-build_flags = -DBOARD_HAS_PSRAM
+build_flags = -DHAL=5
+              -DBOARD_HAS_PSRAM
               -mfix-esp32-psram-cache-issue
 platform_packages =
     platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#1.0.5-rc6