first commit

libraries/TinySuite/examples/watchdog/main.cpp

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+#include <avr/interrupt.h>
+#include <TinyWatchdog.h>
+#include <TinySleep.h>
+
+int main() {
+  sei();
+  Watchdog.arm(9, [](){
+    // do something after 8 seconds (prescaler value of 9 translates to 8 seconds)
+  });
+  deepSleep();
+  // at this point the watchdog will interrupt the sleep
+  cli();
+  deepSleep();
+}