diff --git a/.arduino-ci.yml b/.arduino-ci.yml
new file mode 100644
index 0000000..8a095a8
--- /dev/null
+++ b/.arduino-ci.yml
@@ -0,0 +1,25 @@
+# https://github.com/Arduino-CI/arduino_ci/issues/159
+# copied from vendor/bundle/ruby/2.6.0/gems/arduino_ci-0.3.0/misc/default.yml
+platforms:
+  mega2560:
+    board: arduino:avr:mega:cpu=atmega2560
+    package: arduino:avr
+    gcc:
+      features:
+      defines:
+        - __AVR_ATmega2560__
+        # added this line
+        - ARDUINO_CI
+      warnings:
+      flags:
+
+unittest:
+  platforms:
+    - mega2560
+  testfiles:
+    reject:
+      - "Common.cpp"
+
+compile:
+  platforms:
+    - mega2560
diff --git a/.bundle/config b/.bundle/config
new file mode 100644
index 0000000..2369228
--- /dev/null
+++ b/.bundle/config
@@ -0,0 +1,2 @@
+---
+BUNDLE_PATH: "vendor/bundle"
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bd10d2f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+Gemfile.lock
+vendor
+# C++ stuff
+*.bin
+*.bin.dSYM
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..fb422d1
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,2 @@
+source 'https://rubygems.org'
+gem 'arduino_ci'
diff --git a/PID_v1.cpp b/src/PID_v1.cpp
similarity index 100%
rename from PID_v1.cpp
rename to src/PID_v1.cpp
diff --git a/PID_v1.h b/src/PID_v1.h
similarity index 100%
rename from PID_v1.h
rename to src/PID_v1.h
diff --git a/test/test.cpp b/test/test.cpp
new file mode 100644
index 0000000..affab10
--- /dev/null
+++ b/test/test.cpp
@@ -0,0 +1,6 @@
+#include "Arduino.h"
+#include "ArduinoUnitTests.h"
+
+unittest(test) { assertTrue(true); }
+
+unittest_main()