From ccccf0fd8d822a46e5eb6341196cdbdcdcbefa48 Mon Sep 17 00:00:00 2001
From: brentru <robots199@me.com>
Date: Mon, 30 Jul 2018 15:24:09 -0400
Subject: [PATCH] adding deepsleep

---
 IFTTT_Door_Detector/IFTTT_Door_Detector.ino | 133 ++++++++++++--------
 1 file changed, 79 insertions(+), 54 deletions(-)

diff --git a/IFTTT_Door_Detector/IFTTT_Door_Detector.ino b/IFTTT_Door_Detector/IFTTT_Door_Detector.ino
index bb024fd76..97692e938 100644
--- a/IFTTT_Door_Detector/IFTTT_Door_Detector.ino
+++ b/IFTTT_Door_Detector/IFTTT_Door_Detector.ino
@@ -1,96 +1,97 @@
-// Adafruit IO IFTTT Door Detector Example
-// Tutorial Link: https://learn.adafruit.com/using-ifttt-with-adafruit-io
+// Adafruit IO IFTTT Door Detector
+// 
+// Learn Guide: https://learn.adafruit.com/using-ifttt-with-adafruit-io
 //
 // Adafruit invests time and resources providing this open source code.
 // Please support Adafruit and open source hardware by purchasing
 // products from Adafruit!
 //
 // Written by Todd Treece for Adafruit Industries
-// modified by Brent Rubell for Adafruit Industries
 // Copyright (c) 2018 Adafruit Industries
 // Licensed under the MIT license.
 //
 // All text above must be included in any redistribution.
 
 /************************** Configuration ***********************************/
+
 // edit the config.h tab and enter your Adafruit IO credentials
 // and any additional configuration needed for WiFi, cellular,
 // or ethernet clients.
 #include "config.h"
+#include <EEPROM.h>
 /************************ Example Starts Here *******************************/
-// door pin
-#define DOOR_PIN 13
 
-// how often to report battery level to Adafruit IO (in minutes)
+// door gpio pin
+#define DOOR 13
+
+// how often to report battery level to adafruit IO (in minutes)
 #define BATTERY_INTERVAL 5
 
 // how long to sleep between checking the door state (in seconds)
-#define SLEEP_LENGTH 30
-
-// holds the count of the battery check (in minutes)
-int loop_cycles = 0;
-
-// set up the `door` feed
-AdafruitIO_Feed *door = io.feed("door");
-
-// set up the `battery` feed
-AdafruitIO_Feed *battery = io.feed("battery");
+#define SLEEP_LENGTH 3
 
 void setup() {
+
   // start the serial connection
   Serial.begin(115200);
 
-  // wait for serial monitor to open
   while (!Serial);
-  Serial.println("IFTTT Door Detector");
+  Serial.println("Adafruit IO Door Detector");
 
-  pinMode(DOOR_PIN, INPUT_PULLUP);
+  EEPROM.begin(512);
+  pinMode(DOOR, INPUT_PULLUP);
 
-  // connect to io.adafruit.com
-  Serial.println("Connecting to Adafruit IO");
-  io.connect();
+  // get the current count position from eeprom
+  byte battery_count = EEPROM.read(0);
 
-  // wait for a connection
-  while(io.status() < AIO_CONNECTED) {
-    Serial.print(".");
-    delay(500);
-  }
-
-  // we are connected
-  Serial.println();
-  Serial.println(io.statusText());
-}
-
-void loop() {
-  // io.run(); is required for all sketches.
-  // it should always be present at the top of your loop
-  // function. it keeps the client connected to
-  // io.adafruit.com, and processes any incoming data.
-  io.run();
-
-  // check the loop interval against the battery check interval
-  if (loop_cycles == BATTERY_INTERVAL) {
-    // reset the counter
-    loop_cycles = 0;
-    // report the battery level to the IO 'battery' feed
+  // we only need this to happen once every X minutes,
+  // so we use eeprom to track the count between resets.
+  if(battery_count >= ((BATTERY_INTERVAL * 60) / SLEEP_LENGTH)) {
+    // reset counter
+    battery_count = 0;
+    // report battery level to Adafruit IO
     battery_level();
   }
   else {
-    loop_cycles++; 
+    // increment counter
+    battery_count++;
   }
 
-  if (digitalRead(DOOR_PIN) == LOW) {
-    // if the door isn't open, we don't need to send anything.
-    Serial.println("\tDoor Closed");
+  // save the current count
+  EEPROM.write(0, battery_count);
+  EEPROM.commit();
+
+  // if door isn't open, we don't need to send anything
+  if(digitalRead(DOOR) == LOW) {
+    Serial.println("Door closed");
+    // we don't do anything
   }
   else {
-    // door open, let's send a value to adafruit io
-    Serial.println("\tDoor Open");
-    door->save(1);
+    // the door is open if we have reached here,
+    // so we should send a value to Adafruit IO.
+    Serial.println("Door is open!");
+    door_open();
   }
 
-  // delay the loop by SLEEP_LENGTH seconds
-  delay(SLEEP_LENGTH*1000);
+  // we are done here. go back to sleep.
+  Serial.println("zzzz");
+  ESP.deepSleep(SLEEP_LENGTH * 1000000);
+}
+
+void loop() {
+  // noop
+}
+
+void door_open(){
+  // connect us to Adafruit IO...
+  connect_AIO();
+
+  // grab the door feed
+  AdafruitIO_Feed *door = io.feed("door");
+
+  Serial.println("Sending door value to door feed...");
+  door->save(1);
+  io.run();
 }
 
 void battery_level() {
@@ -101,9 +102,33 @@ void battery_level() {
   // this means our min analog read value should be 580 (3.14V)
   // and the max analog read value should be 774 (4.2V).
   int level = analogRead(A0);
+
   // convert battery level to percent
   level = map(level, 580, 774, 0, 100);
   Serial.print("Battery level: "); Serial.print(level); Serial.println("%");
+
+  // connect us to Adafruit IO
+  connect_AIO();
+  // grab the battery feed
+  AdafruitIO_Feed *battery = io.feed("battery");
+  
+  // send battery level to AIO
   battery->save(level);
+  io.run();
+}
+
+void connect_AIO() {
+  Serial.println("Connecting to Adafruit IO...");
+  io.connect();
+
+  // wait for a connection
+  while (io.status() < AIO_CONNECTED) {
+    Serial.print(".");
+    delay(500);
+  }
+
+  // we are connected
+  Serial.println();
+  Serial.println(io.statusText());
 }