From 5456a1f69885ed9a670c156ab6326b2f0965b76e Mon Sep 17 00:00:00 2001
From: Martino Facchin <m.facchin@arduino.cc>
Date: Thu, 13 Jul 2017 16:56:25 +0200
Subject: [PATCH] [Examples] Avoid spurious wakeup

---
 examples/ExternalWakeup/ExternalWakeup.ino | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/examples/ExternalWakeup/ExternalWakeup.ino b/examples/ExternalWakeup/ExternalWakeup.ino
index 09a7610..6151258 100644
--- a/examples/ExternalWakeup/ExternalWakeup.ino
+++ b/examples/ExternalWakeup/ExternalWakeup.ino
@@ -21,6 +21,8 @@ const int pin = 8;
 
 void setup() {
   pinMode(LED_BUILTIN, OUTPUT);
+  // Set pin 8 as INPUT_PULLUP to avoid spurious wakeup
+  pinMode(pin, INPUT_PULLUP);
   // Attach a wakeup interrupt on pin 8, calling repetitionsIncrease when the device is woken up
   LowPower.attachInterruptWakeup(pin, repetitionsIncrease, CHANGE);
 }