1 files changed, 30 insertions, 0 deletions
diff --git a/platformio/common/include/homekit/stopwatch.h b/platformio/common/include/homekit/stopwatch.h
new file mode 100644
index 0000000..bac2fcc
--- /dev/null
+++ b/platformio/common/include/homekit/stopwatch.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <Arduino.h>
+
+namespace homekit {
+
+class StopWatch {
+private:
+    unsigned long time;
+
+public:
+    StopWatch() : time(0) {};
+
+    inline void save() {
+        time = millis();
+    }
+
+    inline bool elapsed(unsigned long ms) {
+        unsigned long now = millis();
+        if (now < time) {
+            // rollover?
+            time = now;
+        } else if (now - time >= ms) {
+            return true;
+        }
+        return false;
+    }
+};
+
+}
+\ No newline at end of file