Sleepy Snail-Mail Concierge

Monitor your mailbox, indicate when you have physical mail. Extensive use of Power Down Sleep mode extends battery life to about 40 days

May 3, 2020

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3 respects

home automation

monitoring

Components and supplies

Arduino Nano

Resistor 100k ohm

5 mm LED: Red

Perf Board, 2.5 x 3.5 inches

Resistor 1M ohm

Battery Holder, 18650 x 2

LED Flip Light for LEDs and reflector

Photo resistor

Buck Converter Module, adjustable, LM2596 Based

Phototransistor BPW85B

Mailbox, black plastic

Tools and machines

Solder Wire, Lead Free

Soldering iron (generic)

Project description

Code

Mailbox Monitor Code

arduino

Code for Mailbox Monitoring system

1#include <LowPower.h>// Library for sleep routines
2#include <stdio.h>
3
4int   sensePin = A0; // Photo Resistor Sensor Pin
5int lightPin = 2;  // LED Illuminator   Control Pin
6int doorPin = 3;   // Photo Transistor Door Interrupt Pin
7int   ledPin = 13;   // Status LED Pin
8int voltPin = A7;  // Battery Voltage Sense   Pin
9
10long lastCheckMillis = 0; // time of last mail check in millis
11long   testTimeout; // In test mode, returns to normal mode when millis() exceeds this   value
12const bool ON = LOW; // For controlling Illuminator LEDs
13const bool   OFF = HIGH;// For controlling Illuminator LEDs
14volatile bool boxWasOpened = false;//   Set to true when mailbox needs checked for mail
15
16int testMode = 0;// Select   from mormal run mode (0 value) or a test mode (1 = voltage, 2 = Light sensor, illuminator   off, 3 = Light sensor, Illuminator on)
17bool mailInBox = false; // set to true   if mail is detected in box
18
19
20void setup() {
21  // initialize digital   pin LED_BUILTIN as an output.
22  pinMode(LED_BUILTIN, OUTPUT);
23  pinMode(lightPin,   OUTPUT);
24  pinMode(doorPin, INPUT);
25  digitalWrite(lightPin, ON);
26  attachInterrupt(digitalPinToInterrupt(doorPin),   doorInterrupt, FALLING); // Interrupt for door sensing
27
28  Serial.begin(115200);
29   Light(OFF); // Start with illuminator off
30}
31void doorInterrupt(void) {
32   boxWasOpened = true;//  Ready for mail checking next time through main loop
33   mailInBox = false;
34}
35
36int readAverage(int myPin) { // Read an average   value on any analog pin, 10 iterations
37  int i = 0;
38  int iterations = 10;
39   long readVals = 0;
40  for (i = 1; i <= iterations; i++)
41  {
42    readVals   += analogRead(myPin);
43  }
44  return (readVals / iterations);
45}
46
47void   Light(bool myStatus) { // Control Illuminator LEDs
48  digitalWrite(lightPin, myStatus);
49}
50
51void   LED(bool myStatus) {  // Control Status LEDs
52  digitalWrite(ledPin, !myStatus);
53}
54
55bool   CheckMail(bool haveMail) { // Check for mail in mailbox after door close interrupt
56   long senseVal; // Photo Transistor value read
57  bool retVal = false ; // Return   value for function
58  Light(ON);
59  delay(300); // Allow time for illuminator   to stabilize
60  lastCheckMillis = millis();
61
62  senseVal = readAverage(sensePin);
63   Serial.println(senseVal);
64  if (senseVal >= 35) { // Mail detected at this   light level
65    retVal = true;
66  }
67  Light(OFF);
68  Serial.println(retVal);
69   return retVal;
70}
71
72void wakeUp()
73{
74  // Just a handler for the pin   interrupt.
75}
76
77
78
79int testCheck(void) { // check for and initiate test   modes
80
81  if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin) < 100)   {
82    delay(1000); // Only enter test mode if Photoresistor is blocked, door   is opened
83
84    if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin)   < 100) {
85      testMode ++; // Increment test mode when command received
86       if (testMode > 3) {
87        testMode = 0;
88        Light(OFF);
89        boxWasOpened   = true;
90      }
91      Serial.print("Test mode = ");
92      Serial.println(testMode);
93       for (int x = 1; x < 11; x++) { // Indicate test mode selected on the status   LEDs before starting test display
94        flashFast(testMode);
95        delay   (500);
96
97      }
98      testTimeout = millis() + 60000; //exit test mode   after 60 seconds
99      delay(1000);
100
101    }
102    else {
103
104    }
105   }
106}
107
108void sleepNow() { // Sleep mode used for NO mail present
109
110   if ((digitalRead(doorPin) == LOW) && analogRead(sensePin) <= 25) { // OK for sleep   mode
111
112
113    attachInterrupt(0, wakeUp, LOW); //set wakeup interrupt
114     Serial.println("Going to sleep now.");
115    delay(200);
116    LowPower.powerDown(SLEEP_FOREVER,   ADC_OFF, BOD_OFF); // Set sleep mode NO timeout
117    // Disable external pin interrupt   on wake up pin.
118
119    detachInterrupt(0);
120    Serial.println("Now I'm up!");
121   }
122  else {
123    Serial.println("Not tired yet");
124  }
125}
126void sleep2()   { // Sleep mode used for mail IS present
127  attachInterrupt(0, wakeUp, LOW);
128   Serial.println("Going into sleep2 now.");
129  delay(200);
130  LowPower.powerDown(SLEEP_2S,   ADC_OFF, BOD_OFF); // Set sleep mode with 2 second timeout
131  // Disable external   pin interrupt on wake up pin.
132
133  detachInterrupt(0);
134  Serial.println("NOw   I'm up!");
135
136}
137
138void flash(int iterations) { // Flash status LEDs number   of times requested in <iterations>
139  for (int x = 1; x <= iterations; x++ ) {
140
141     //digitalWrite(ledPin, HIGH);
142    LED(ON);
143    delay(150);
144    //digitalWrite(ledPin,   LOW);
145    LED(OFF);
146    delay(200);
147  }
148}
149
150void flashFast(int   iterations) { // double Speed Flash status LEDs number of times requested in <iterations>
151   for (int x = 1; x <= iterations; x++ ) {
152
153    LED(ON);
154    delay(150);
155     LED(OFF);
156    delay(100);
157  }
158}
159
160void showSenseRead(int myVall)   { // Display Sensor reading on status LEDs
161  int intDigit;
162  String myChar;
163   char valStr[5];
164
165  sprintf(valStr, "%d", myVall);// Convert reading to   a character string
166  Serial.print("Sensor Value ");
167  Serial.println(valStr);
168
169   if (myVall == 0) {// Quickly flash 15 time if reading is zero
170    flashFast(15);
171   }
172  else if ((myVall > 0) && (myVall < 10)) {
173    flash(myVall);
174    delay(300);
175   }
176  else if (myVall > 9 && myVall < 100) {
177    int xVal;
178    xVal = myVall   / 10;
179    flash(xVal);
180    delay(300);
181    xVal = myVall % 10;
182    flash(xVal);
183     delay (300);
184  }
185  else if (myVall > 99 && myVall < 1000) {
186    int   xVal;
187    xVal = myVall / 100;
188    flash(xVal);
189    delay(300);
190    xVal   = (myVall - xVal * 100) / 10;
191    flash(xVal);
192    delay(300);
193    xVal   = myVall % 10;
194    flash(xVal);
195    delay (300);
196  }
197}
198
199void showVolts(float   myVolts) {// Display battery voltage on status LEDs
200  int intDigit;
201  if (myVolts   == 0.00) {// Send 0 to force voltage reading
202    myVolts = readVolts();
203  }
204   myVolts *= 1.00;
205  String myChar;
206  char voltStr[6];
207
208  dtostrf(myVolts,   4, 2, voltStr);// Convert voltage to a character string
209
210  Serial.print("ShowVolts   VOltage ");
211  Serial.println(voltStr);
212  // delay(10);
213  dtostrf(myVolts,   4, 2, voltStr);// Convert voltage to a character string
214  myChar = voltStr[0];
215
216   intDigit = String(myChar).toInt();
217  // Serial.print("Corrent Digit ");
218   //Serial.println(intDigit);
219  flash(intDigit);
220  delay(300);
221
222  myChar   = voltStr[2];
223
224  intDigit = String(myChar).toInt();
225
226  //Serial.print("Corrent   Digit ");
227  //Serial.println(intDigit);
228
229  if (intDigit > 0 ) {
230    flash(intDigit);
231     delay( 300);
232  }
233  else {
234    delay(400);
235  }
236  //  my
237  myChar   = voltStr[3];
238
239  intDigit = String(myChar).toInt();
240
241  //Serial.print("Corrent   Digit ");
242  // Serial.println(intDigit);
243
244  if (intDigit > 0 ) {
245    flash(intDigit);
246     delay( 300);
247  }
248  else {
249    delay(400);
250  }
251
252}
253
254float   readVolts(void) {// Get current battery voltage and return it
255  float myRead;
256   float myVolts;
257  myRead = float(readAverage(voltPin));
258  float myConv =   4.63 / 1023.00;
259  myVolts = (myRead * 2 * myConv * 1.0811);
260  Serial.println(myVolts);
261   return (myVolts);
262}
263void loop() {
264  static bool lowVolts = false;
265   float curVolts;
266  curVolts = readVolts();
267  if (curVolts <= 6.5) {
268    lowVolts   = true; // If battery is running low, LEDs will flasw 3 times, not one for mail   indication
269
270  }
271  testCheck();  // Check for test mode request
272  if   ((millis() > testTimeout) && testMode > 0) {// Return to normal mode after 1 minute   of test mode
273    testMode = 0;
274    Light(OFF);
275    boxWasOpened = true;//   want to ensure check
276  }
277  if (testMode == 0) {// Normal mail display mode
278
279     if (digitalRead(doorPin) == HIGH) {// Stop mail indication when door is opened
280       digitalWrite(ledPin, LOW);
281      mailInBox = false;// will be set to true   once door is closed
282    }
283    if (readAverage(sensePin >= 25)) {// Can be   due to EITHER door being opened
284
285      boxWasOpened = true;
286      while   (readAverage(sensePin) >= 25) {
287        //do nothing until door is closed again
288       }
289
290    }
291    if (boxWasOpened && digitalRead(doorPin) == LOW) {
292       delay(200);
293      if (boxWasOpened && digitalRead(doorPin) == LOW) {
294         //delay(2000);
295        mailInBox  = CheckMail(mailInBox);// Actual mail   check
296        boxWasOpened = false;
297      }
298
299    }
300
301    Serial.println();
302     Serial.println(mailInBox);
303    Serial.println();
304    if (mailInBox ==   true) {// Mail Present in Box
305      LED(ON);
306      Serial.println("LED ON");
307       delay(100);
308      LED(OFF);
309
310      if (lowVolts) {// Blink 3 times   instead of one for low voltage
311        delay(200);
312        LED(ON);
313        delay(100);
314         LED(OFF);
315        delay(200);
316        LED(ON);
317        delay(100);
318         LED(OFF);
319
320
321
322      }
323
324      Serial.println(readAverage(sensePin));
325       //delay(2350);
326      sleep2();
327
328    }
329    else {
330      LED(OFF);
331
332       delay(200);
333      sleepNow();// No mail, go to hard sleep 
334    }
335   }
336  else if (testMode == 1) {  //  Test mode 1 display
337    // curVolts =   readVolts();
338    int myVall;
339    myVall = readAverage(sensePin);
340
341    showVolts(curVolts);
342     //flash(5);
343    delay (2000);
344  }
345
346  else if (testMode > 1) {  //   Test modes 2, 3 display
347    Light (testMode == 2);// light on if testmode is   3
348    int myVall;
349    myVall = readAverage(sensePin);
350    Serial.print("Light   Value ");
351    Serial.println(myVall);
352    showSenseRead(myVall);
353    delay(2000);
354   }
355}

#include <LowPower.h>// Library for sleep routines
#include <stdio.h>

int   sensePin = A0; // Photo Resistor Sensor Pin
int lightPin = 2;  // LED Illuminator   Control Pin
int doorPin = 3;   // Photo Transistor Door Interrupt Pin
int   ledPin = 13;   // Status LED Pin
int voltPin = A7;  // Battery Voltage Sense   Pin

long lastCheckMillis = 0; // time of last mail check in millis
long   testTimeout; // In test mode, returns to normal mode when millis() exceeds this   value
const bool ON = LOW; // For controlling Illuminator LEDs
const bool   OFF = HIGH;// For controlling Illuminator LEDs
volatile bool boxWasOpened = false;//   Set to true when mailbox needs checked for mail

int testMode = 0;// Select   from mormal run mode (0 value) or a test mode (1 = voltage, 2 = Light sensor, illuminator   off, 3 = Light sensor, Illuminator on)
bool mailInBox = false; // set to true   if mail is detected in box


void setup() {
  // initialize digital   pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(lightPin,   OUTPUT);
  pinMode(doorPin, INPUT);
  digitalWrite(lightPin, ON);
  attachInterrupt(digitalPinToInterrupt(doorPin),   doorInterrupt, FALLING); // Interrupt for door sensing

  Serial.begin(115200);
   Light(OFF); // Start with illuminator off
}
void doorInterrupt(void) {
   boxWasOpened = true;//  Ready for mail checking next time through main loop
   mailInBox = false;
}

int readAverage(int myPin) { // Read an average   value on any analog pin, 10 iterations
  int i = 0;
  int iterations = 10;
   long readVals = 0;
  for (i = 1; i <= iterations; i++)
  {
    readVals   += analogRead(myPin);
  }
  return (readVals / iterations);
}

void   Light(bool myStatus) { // Control Illuminator LEDs
  digitalWrite(lightPin, myStatus);
}

void   LED(bool myStatus) {  // Control Status LEDs
  digitalWrite(ledPin, !myStatus);
}

bool   CheckMail(bool haveMail) { // Check for mail in mailbox after door close interrupt
   long senseVal; // Photo Transistor value read
  bool retVal = false ; // Return   value for function
  Light(ON);
  delay(300); // Allow time for illuminator   to stabilize
  lastCheckMillis = millis();

  senseVal = readAverage(sensePin);
   Serial.println(senseVal);
  if (senseVal >= 35) { // Mail detected at this   light level
    retVal = true;
  }
  Light(OFF);
  Serial.println(retVal);
   return retVal;
}

void wakeUp()
{
  // Just a handler for the pin   interrupt.
}



int testCheck(void) { // check for and initiate test   modes

  if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin) < 100)   {
    delay(1000); // Only enter test mode if Photoresistor is blocked, door   is opened

    if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin)   < 100) {
      testMode ++; // Increment test mode when command received
       if (testMode > 3) {
        testMode = 0;
        Light(OFF);
        boxWasOpened   = true;
      }
      Serial.print("Test mode = ");
      Serial.println(testMode);
       for (int x = 1; x < 11; x++) { // Indicate test mode selected on the status   LEDs before starting test display
        flashFast(testMode);
        delay   (500);

      }
      testTimeout = millis() + 60000; //exit test mode   after 60 seconds
      delay(1000);

    }
    else {

    }
   }
}

void sleepNow() { // Sleep mode used for NO mail present

   if ((digitalRead(doorPin) == LOW) && analogRead(sensePin) <= 25) { // OK for sleep   mode


    attachInterrupt(0, wakeUp, LOW); //set wakeup interrupt
     Serial.println("Going to sleep now.");
    delay(200);
    LowPower.powerDown(SLEEP_FOREVER,   ADC_OFF, BOD_OFF); // Set sleep mode NO timeout
    // Disable external pin interrupt   on wake up pin.

    detachInterrupt(0);
    Serial.println("Now I'm up!");
   }
  else {
    Serial.println("Not tired yet");
  }
}
void sleep2()   { // Sleep mode used for mail IS present
  attachInterrupt(0, wakeUp, LOW);
   Serial.println("Going into sleep2 now.");
  delay(200);
  LowPower.powerDown(SLEEP_2S,   ADC_OFF, BOD_OFF); // Set sleep mode with 2 second timeout
  // Disable external   pin interrupt on wake up pin.

  detachInterrupt(0);
  Serial.println("NOw   I'm up!");

}

void flash(int iterations) { // Flash status LEDs number   of times requested in <iterations>
  for (int x = 1; x <= iterations; x++ ) {

     //digitalWrite(ledPin, HIGH);
    LED(ON);
    delay(150);
    //digitalWrite(ledPin,   LOW);
    LED(OFF);
    delay(200);
  }
}

void flashFast(int   iterations) { // double Speed Flash status LEDs number of times requested in <iterations>
   for (int x = 1; x <= iterations; x++ ) {

    LED(ON);
    delay(150);
     LED(OFF);
    delay(100);
  }
}

void showSenseRead(int myVall)   { // Display Sensor reading on status LEDs
  int intDigit;
  String myChar;
   char valStr[5];

  sprintf(valStr, "%d", myVall);// Convert reading to   a character string
  Serial.print("Sensor Value ");
  Serial.println(valStr);

   if (myVall == 0) {// Quickly flash 15 time if reading is zero
    flashFast(15);
   }
  else if ((myVall > 0) && (myVall < 10)) {
    flash(myVall);
    delay(300);
   }
  else if (myVall > 9 && myVall < 100) {
    int xVal;
    xVal = myVall   / 10;
    flash(xVal);
    delay(300);
    xVal = myVall % 10;
    flash(xVal);
     delay (300);
  }
  else if (myVall > 99 && myVall < 1000) {
    int   xVal;
    xVal = myVall / 100;
    flash(xVal);
    delay(300);
    xVal   = (myVall - xVal * 100) / 10;
    flash(xVal);
    delay(300);
    xVal   = myVall % 10;
    flash(xVal);
    delay (300);
  }
}

void showVolts(float   myVolts) {// Display battery voltage on status LEDs
  int intDigit;
  if (myVolts   == 0.00) {// Send 0 to force voltage reading
    myVolts = readVolts();
  }
   myVolts *= 1.00;
  String myChar;
  char voltStr[6];

  dtostrf(myVolts,   4, 2, voltStr);// Convert voltage to a character string

  Serial.print("ShowVolts   VOltage ");
  Serial.println(voltStr);
  // delay(10);
  dtostrf(myVolts,   4, 2, voltStr);// Convert voltage to a character string
  myChar = voltStr[0];

   intDigit = String(myChar).toInt();
  // Serial.print("Corrent Digit ");
   //Serial.println(intDigit);
  flash(intDigit);
  delay(300);

  myChar   = voltStr[2];

  intDigit = String(myChar).toInt();

  //Serial.print("Corrent   Digit ");
  //Serial.println(intDigit);

  if (intDigit > 0 ) {
    flash(intDigit);
     delay( 300);
  }
  else {
    delay(400);
  }
  //  my
  myChar   = voltStr[3];

  intDigit = String(myChar).toInt();

  //Serial.print("Corrent   Digit ");
  // Serial.println(intDigit);

  if (intDigit > 0 ) {
    flash(intDigit);
     delay( 300);
  }
  else {
    delay(400);
  }

}

float   readVolts(void) {// Get current battery voltage and return it
  float myRead;
   float myVolts;
  myRead = float(readAverage(voltPin));
  float myConv =   4.63 / 1023.00;
  myVolts = (myRead * 2 * myConv * 1.0811);
  Serial.println(myVolts);
   return (myVolts);
}
void loop() {
  static bool lowVolts = false;
   float curVolts;
  curVolts = readVolts();
  if (curVolts <= 6.5) {
    lowVolts   = true; // If battery is running low, LEDs will flasw 3 times, not one for mail   indication

  }
  testCheck();  // Check for test mode request
  if   ((millis() > testTimeout) && testMode > 0) {// Return to normal mode after 1 minute   of test mode
    testMode = 0;
    Light(OFF);
    boxWasOpened = true;//   want to ensure check
  }
  if (testMode == 0) {// Normal mail display mode

     if (digitalRead(doorPin) == HIGH) {// Stop mail indication when door is opened
       digitalWrite(ledPin, LOW);
      mailInBox = false;// will be set to true   once door is closed
    }
    if (readAverage(sensePin >= 25)) {// Can be   due to EITHER door being opened

      boxWasOpened = true;
      while   (readAverage(sensePin) >= 25) {
        //do nothing until door is closed again
       }

    }
    if (boxWasOpened && digitalRead(doorPin) == LOW) {
       delay(200);
      if (boxWasOpened && digitalRead(doorPin) == LOW) {
         //delay(2000);
        mailInBox  = CheckMail(mailInBox);// Actual mail   check
        boxWasOpened = false;
      }

    }

    Serial.println();
     Serial.println(mailInBox);
    Serial.println();
    if (mailInBox ==   true) {// Mail Present in Box
      LED(ON);
      Serial.println("LED ON");
       delay(100);
      LED(OFF);

      if (lowVolts) {// Blink 3 times   instead of one for low voltage
        delay(200);
        LED(ON);
        delay(100);
         LED(OFF);
        delay(200);
        LED(ON);
        delay(100);
         LED(OFF);



      }

      Serial.println(readAverage(sensePin));
       //delay(2350);
      sleep2();

    }
    else {
      LED(OFF);

       delay(200);
      sleepNow();// No mail, go to hard sleep 
    }
   }
  else if (testMode == 1) {  //  Test mode 1 display
    // curVolts =   readVolts();
    int myVall;
    myVall = readAverage(sensePin);

    showVolts(curVolts);
     //flash(5);
    delay (2000);
  }

  else if (testMode > 1) {  //   Test modes 2, 3 display
    Light (testMode == 2);// light on if testmode is   3
    int myVall;
    myVall = readAverage(sensePin);
    Serial.print("Light   Value ");
    Serial.println(myVall);
    showSenseRead(myVall);
    delay(2000);
   }
}

Mailbox Monitor Code

arduino

Code for Mailbox Monitoring system

1#include <LowPower.h>// Library for sleep routines
2#include <stdio.h>
3
4int  sensePin = A0; // Photo Resistor Sensor Pin
5int lightPin = 2;  // LED Illuminator  Control Pin
6int doorPin = 3;   // Photo Transistor Door Interrupt Pin
7int  ledPin = 13;   // Status LED Pin
8int voltPin = A7;  // Battery Voltage Sense  Pin
9
10long lastCheckMillis = 0; // time of last mail check in millis
11long  testTimeout; // In test mode, returns to normal mode when millis() exceeds this  value
12const bool ON = LOW; // For controlling Illuminator LEDs
13const bool  OFF = HIGH;// For controlling Illuminator LEDs
14volatile bool boxWasOpened = false;//  Set to true when mailbox needs checked for mail
15
16int testMode = 0;// Select  from mormal run mode (0 value) or a test mode (1 = voltage, 2 = Light sensor, illuminator  off, 3 = Light sensor, Illuminator on)
17bool mailInBox = false; // set to true  if mail is detected in box
18
19
20void setup() {
21  // initialize digital  pin LED_BUILTIN as an output.
22  pinMode(LED_BUILTIN, OUTPUT);
23  pinMode(lightPin,  OUTPUT);
24  pinMode(doorPin, INPUT);
25  digitalWrite(lightPin, ON);
26  attachInterrupt(digitalPinToInterrupt(doorPin),  doorInterrupt, FALLING); // Interrupt for door sensing
27
28  Serial.begin(115200);
29  Light(OFF); // Start with illuminator off
30}
31void doorInterrupt(void) {
32  boxWasOpened = true;//  Ready for mail checking next time through main loop
33  mailInBox = false;
34}
35
36int readAverage(int myPin) { // Read an average  value on any analog pin, 10 iterations
37  int i = 0;
38  int iterations = 10;
39  long readVals = 0;
40  for (i = 1; i <= iterations; i++)
41  {
42    readVals  += analogRead(myPin);
43  }
44  return (readVals / iterations);
45}
46
47void  Light(bool myStatus) { // Control Illuminator LEDs
48  digitalWrite(lightPin, myStatus);
49}
50
51void  LED(bool myStatus) {  // Control Status LEDs
52  digitalWrite(ledPin, !myStatus);
53}
54
55bool  CheckMail(bool haveMail) { // Check for mail in mailbox after door close interrupt
56  long senseVal; // Photo Transistor value read
57  bool retVal = false ; // Return  value for function
58  Light(ON);
59  delay(300); // Allow time for illuminator  to stabilize
60  lastCheckMillis = millis();
61
62  senseVal = readAverage(sensePin);
63  Serial.println(senseVal);
64  if (senseVal >= 35) { // Mail detected at this  light level
65    retVal = true;
66  }
67  Light(OFF);
68  Serial.println(retVal);
69  return retVal;
70}
71
72void wakeUp()
73{
74  // Just a handler for the pin  interrupt.
75}
76
77
78
79int testCheck(void) { // check for and initiate test  modes
80
81  if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin) < 100)  {
82    delay(1000); // Only enter test mode if Photoresistor is blocked, door  is opened
83
84    if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin)  < 100) {
85      testMode ++; // Increment test mode when command received
86      if (testMode > 3) {
87        testMode = 0;
88        Light(OFF);
89        boxWasOpened  = true;
90      }
91      Serial.print("Test mode = ");
92      Serial.println(testMode);
93      for (int x = 1; x < 11; x++) { // Indicate test mode selected on the status  LEDs before starting test display
94        flashFast(testMode);
95        delay  (500);
96
97      }
98      testTimeout = millis() + 60000; //exit test mode  after 60 seconds
99      delay(1000);
100
101    }
102    else {
103
104    }
105  }
106}
107
108void sleepNow() { // Sleep mode used for NO mail present
109
110  if ((digitalRead(doorPin) == LOW) && analogRead(sensePin) <= 25) { // OK for sleep  mode
111
112
113    attachInterrupt(0, wakeUp, LOW); //set wakeup interrupt
114    Serial.println("Going to sleep now.");
115    delay(200);
116    LowPower.powerDown(SLEEP_FOREVER,  ADC_OFF, BOD_OFF); // Set sleep mode NO timeout
117    // Disable external pin interrupt  on wake up pin.
118
119    detachInterrupt(0);
120    Serial.println("Now I'm up!");
121  }
122  else {
123    Serial.println("Not tired yet");
124  }
125}
126void sleep2()  { // Sleep mode used for mail IS present
127  attachInterrupt(0, wakeUp, LOW);
128  Serial.println("Going into sleep2 now.");
129  delay(200);
130  LowPower.powerDown(SLEEP_2S,  ADC_OFF, BOD_OFF); // Set sleep mode with 2 second timeout
131  // Disable external  pin interrupt on wake up pin.
132
133  detachInterrupt(0);
134  Serial.println("NOw  I'm up!");
135
136}
137
138void flash(int iterations) { // Flash status LEDs number  of times requested in <iterations>
139  for (int x = 1; x <= iterations; x++ ) {
140
141    //digitalWrite(ledPin, HIGH);
142    LED(ON);
143    delay(150);
144    //digitalWrite(ledPin,  LOW);
145    LED(OFF);
146    delay(200);
147  }
148}
149
150void flashFast(int  iterations) { // double Speed Flash status LEDs number of times requested in <iterations>
151  for (int x = 1; x <= iterations; x++ ) {
152
153    LED(ON);
154    delay(150);
155    LED(OFF);
156    delay(100);
157  }
158}
159
160void showSenseRead(int myVall)  { // Display Sensor reading on status LEDs
161  int intDigit;
162  String myChar;
163  char valStr[5];
164
165  sprintf(valStr, "%d", myVall);// Convert reading to  a character string
166  Serial.print("Sensor Value ");
167  Serial.println(valStr);
168
169  if (myVall == 0) {// Quickly flash 15 time if reading is zero
170    flashFast(15);
171  }
172  else if ((myVall > 0) && (myVall < 10)) {
173    flash(myVall);
174    delay(300);
175  }
176  else if (myVall > 9 && myVall < 100) {
177    int xVal;
178    xVal = myVall  / 10;
179    flash(xVal);
180    delay(300);
181    xVal = myVall % 10;
182    flash(xVal);
183    delay (300);
184  }
185  else if (myVall > 99 && myVall < 1000) {
186    int  xVal;
187    xVal = myVall / 100;
188    flash(xVal);
189    delay(300);
190    xVal  = (myVall - xVal * 100) / 10;
191    flash(xVal);
192    delay(300);
193    xVal  = myVall % 10;
194    flash(xVal);
195    delay (300);
196  }
197}
198
199void showVolts(float  myVolts) {// Display battery voltage on status LEDs
200  int intDigit;
201  if (myVolts  == 0.00) {// Send 0 to force voltage reading
202    myVolts = readVolts();
203  }
204  myVolts *= 1.00;
205  String myChar;
206  char voltStr[6];
207
208  dtostrf(myVolts,  4, 2, voltStr);// Convert voltage to a character string
209
210  Serial.print("ShowVolts  VOltage ");
211  Serial.println(voltStr);
212  // delay(10);
213  dtostrf(myVolts,  4, 2, voltStr);// Convert voltage to a character string
214  myChar = voltStr[0];
215
216  intDigit = String(myChar).toInt();
217  // Serial.print("Corrent Digit ");
218  //Serial.println(intDigit);
219  flash(intDigit);
220  delay(300);
221
222  myChar  = voltStr[2];
223
224  intDigit = String(myChar).toInt();
225
226  //Serial.print("Corrent  Digit ");
227  //Serial.println(intDigit);
228
229  if (intDigit > 0 ) {
230    flash(intDigit);
231    delay( 300);
232  }
233  else {
234    delay(400);
235  }
236  //  my
237  myChar  = voltStr[3];
238
239  intDigit = String(myChar).toInt();
240
241  //Serial.print("Corrent  Digit ");
242  // Serial.println(intDigit);
243
244  if (intDigit > 0 ) {
245    flash(intDigit);
246    delay( 300);
247  }
248  else {
249    delay(400);
250  }
251
252}
253
254float  readVolts(void) {// Get current battery voltage and return it
255  float myRead;
256  float myVolts;
257  myRead = float(readAverage(voltPin));
258  float myConv =  4.63 / 1023.00;
259  myVolts = (myRead * 2 * myConv * 1.0811);
260  Serial.println(myVolts);
261  return (myVolts);
262}
263void loop() {
264  static bool lowVolts = false;
265  float curVolts;
266  curVolts = readVolts();
267  if (curVolts <= 6.5) {
268    lowVolts  = true; // If battery is running low, LEDs will flasw 3 times, not one for mail  indication
269
270  }
271  testCheck();  // Check for test mode request
272  if  ((millis() > testTimeout) && testMode > 0) {// Return to normal mode after 1 minute  of test mode
273    testMode = 0;
274    Light(OFF);
275    boxWasOpened = true;//  want to ensure check
276  }
277  if (testMode == 0) {// Normal mail display mode
278
279    if (digitalRead(doorPin) == HIGH) {// Stop mail indication when door is opened
280      digitalWrite(ledPin, LOW);
281      mailInBox = false;// will be set to true  once door is closed
282    }
283    if (readAverage(sensePin >= 25)) {// Can be  due to EITHER door being opened
284
285      boxWasOpened = true;
286      while  (readAverage(sensePin) >= 25) {
287        //do nothing until door is closed again
288      }
289
290    }
291    if (boxWasOpened && digitalRead(doorPin) == LOW) {
292      delay(200);
293      if (boxWasOpened && digitalRead(doorPin) == LOW) {
294        //delay(2000);
295        mailInBox  = CheckMail(mailInBox);// Actual mail  check
296        boxWasOpened = false;
297      }
298
299    }
300
301    Serial.println();
302    Serial.println(mailInBox);
303    Serial.println();
304    if (mailInBox ==  true) {// Mail Present in Box
305      LED(ON);
306      Serial.println("LED ON");
307      delay(100);
308      LED(OFF);
309
310      if (lowVolts) {// Blink 3 times  instead of one for low voltage
311        delay(200);
312        LED(ON);
313        delay(100);
314        LED(OFF);
315        delay(200);
316        LED(ON);
317        delay(100);
318        LED(OFF);
319
320
321
322      }
323
324      Serial.println(readAverage(sensePin));
325      //delay(2350);
326      sleep2();
327
328    }
329    else {
330      LED(OFF);
331
332      delay(200);
333      sleepNow();// No mail, go to hard sleep 
334    }
335  }
336  else if (testMode == 1) {  //  Test mode 1 display
337    // curVolts =  readVolts();
338    int myVall;
339    myVall = readAverage(sensePin);
340
341    showVolts(curVolts);
342    //flash(5);
343    delay (2000);
344  }
345
346  else if (testMode > 1) {  //  Test modes 2, 3 display
347    Light (testMode == 2);// light on if testmode is  3
348    int myVall;
349    myVall = readAverage(sensePin);
350    Serial.print("Light  Value ");
351    Serial.println(myVall);
352    showSenseRead(myVall);
353    delay(2000);
354  }
355}

#include <LowPower.h>// Library for sleep routines
#include <stdio.h>

int  sensePin = A0; // Photo Resistor Sensor Pin
int lightPin = 2;  // LED Illuminator  Control Pin
int doorPin = 3;   // Photo Transistor Door Interrupt Pin
int  ledPin = 13;   // Status LED Pin
int voltPin = A7;  // Battery Voltage Sense  Pin

long lastCheckMillis = 0; // time of last mail check in millis
long  testTimeout; // In test mode, returns to normal mode when millis() exceeds this  value
const bool ON = LOW; // For controlling Illuminator LEDs
const bool  OFF = HIGH;// For controlling Illuminator LEDs
volatile bool boxWasOpened = false;//  Set to true when mailbox needs checked for mail

int testMode = 0;// Select  from mormal run mode (0 value) or a test mode (1 = voltage, 2 = Light sensor, illuminator  off, 3 = Light sensor, Illuminator on)
bool mailInBox = false; // set to true  if mail is detected in box


void setup() {
  // initialize digital  pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(lightPin,  OUTPUT);
  pinMode(doorPin, INPUT);
  digitalWrite(lightPin, ON);
  attachInterrupt(digitalPinToInterrupt(doorPin),  doorInterrupt, FALLING); // Interrupt for door sensing

  Serial.begin(115200);
  Light(OFF); // Start with illuminator off
}
void doorInterrupt(void) {
  boxWasOpened = true;//  Ready for mail checking next time through main loop
  mailInBox = false;
}

int readAverage(int myPin) { // Read an average  value on any analog pin, 10 iterations
  int i = 0;
  int iterations = 10;
  long readVals = 0;
  for (i = 1; i <= iterations; i++)
  {
    readVals  += analogRead(myPin);
  }
  return (readVals / iterations);
}

void  Light(bool myStatus) { // Control Illuminator LEDs
  digitalWrite(lightPin, myStatus);
}

void  LED(bool myStatus) {  // Control Status LEDs
  digitalWrite(ledPin, !myStatus);
}

bool  CheckMail(bool haveMail) { // Check for mail in mailbox after door close interrupt
  long senseVal; // Photo Transistor value read
  bool retVal = false ; // Return  value for function
  Light(ON);
  delay(300); // Allow time for illuminator  to stabilize
  lastCheckMillis = millis();

  senseVal = readAverage(sensePin);
  Serial.println(senseVal);
  if (senseVal >= 35) { // Mail detected at this  light level
    retVal = true;
  }
  Light(OFF);
  Serial.println(retVal);
  return retVal;
}

void wakeUp()
{
  // Just a handler for the pin  interrupt.
}



int testCheck(void) { // check for and initiate test  modes

  if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin) < 100)  {
    delay(1000); // Only enter test mode if Photoresistor is blocked, door  is opened

    if ((digitalRead(doorPin) == HIGH) && readAverage(sensePin)  < 100) {
      testMode ++; // Increment test mode when command received
      if (testMode > 3) {
        testMode = 0;
        Light(OFF);
        boxWasOpened  = true;
      }
      Serial.print("Test mode = ");
      Serial.println(testMode);
      for (int x = 1; x < 11; x++) { // Indicate test mode selected on the status  LEDs before starting test display
        flashFast(testMode);
        delay  (500);

      }
      testTimeout = millis() + 60000; //exit test mode  after 60 seconds
      delay(1000);

    }
    else {

    }
  }
}

void sleepNow() { // Sleep mode used for NO mail present

  if ((digitalRead(doorPin) == LOW) && analogRead(sensePin) <= 25) { // OK for sleep  mode


    attachInterrupt(0, wakeUp, LOW); //set wakeup interrupt
    Serial.println("Going to sleep now.");
    delay(200);
    LowPower.powerDown(SLEEP_FOREVER,  ADC_OFF, BOD_OFF); // Set sleep mode NO timeout
    // Disable external pin interrupt  on wake up pin.

    detachInterrupt(0);
    Serial.println("Now I'm up!");
  }
  else {
    Serial.println("Not tired yet");
  }
}
void sleep2()  { // Sleep mode used for mail IS present
  attachInterrupt(0, wakeUp, LOW);
  Serial.println("Going into sleep2 now.");
  delay(200);
  LowPower.powerDown(SLEEP_2S,  ADC_OFF, BOD_OFF); // Set sleep mode with 2 second timeout
  // Disable external  pin interrupt on wake up pin.

  detachInterrupt(0);
  Serial.println("NOw  I'm up!");

}

void flash(int iterations) { // Flash status LEDs number  of times requested in <iterations>
  for (int x = 1; x <= iterations; x++ ) {

    //digitalWrite(ledPin, HIGH);
    LED(ON);
    delay(150);
    //digitalWrite(ledPin,  LOW);
    LED(OFF);
    delay(200);
  }
}

void flashFast(int  iterations) { // double Speed Flash status LEDs number of times requested in <iterations>
  for (int x = 1; x <= iterations; x++ ) {

    LED(ON);
    delay(150);
    LED(OFF);
    delay(100);
  }
}

void showSenseRead(int myVall)  { // Display Sensor reading on status LEDs
  int intDigit;
  String myChar;
  char valStr[5];

  sprintf(valStr, "%d", myVall);// Convert reading to  a character string
  Serial.print("Sensor Value ");
  Serial.println(valStr);

  if (myVall == 0) {// Quickly flash 15 time if reading is zero
    flashFast(15);
  }
  else if ((myVall > 0) && (myVall < 10)) {
    flash(myVall);
    delay(300);
  }
  else if (myVall > 9 && myVall < 100) {
    int xVal;
    xVal = myVall  / 10;
    flash(xVal);
    delay(300);
    xVal = myVall % 10;
    flash(xVal);
    delay (300);
  }
  else if (myVall > 99 && myVall < 1000) {
    int  xVal;
    xVal = myVall / 100;
    flash(xVal);
    delay(300);
    xVal  = (myVall - xVal * 100) / 10;
    flash(xVal);
    delay(300);
    xVal  = myVall % 10;
    flash(xVal);
    delay (300);
  }
}

void showVolts(float  myVolts) {// Display battery voltage on status LEDs
  int intDigit;
  if (myVolts  == 0.00) {// Send 0 to force voltage reading
    myVolts = readVolts();
  }
  myVolts *= 1.00;
  String myChar;
  char voltStr[6];

  dtostrf(myVolts,  4, 2, voltStr);// Convert voltage to a character string

  Serial.print("ShowVolts  VOltage ");
  Serial.println(voltStr);
  // delay(10);
  dtostrf(myVolts,  4, 2, voltStr);// Convert voltage to a character string
  myChar = voltStr[0];

  intDigit = String(myChar).toInt();
  // Serial.print("Corrent Digit ");
  //Serial.println(intDigit);
  flash(intDigit);
  delay(300);

  myChar  = voltStr[2];

  intDigit = String(myChar).toInt();

  //Serial.print("Corrent  Digit ");
  //Serial.println(intDigit);

  if (intDigit > 0 ) {
    flash(intDigit);
    delay( 300);
  }
  else {
    delay(400);
  }
  //  my
  myChar  = voltStr[3];

  intDigit = String(myChar).toInt();

  //Serial.print("Corrent  Digit ");
  // Serial.println(intDigit);

  if (intDigit > 0 ) {
    flash(intDigit);
    delay( 300);
  }
  else {
    delay(400);
  }

}

float  readVolts(void) {// Get current battery voltage and return it
  float myRead;
  float myVolts;
  myRead = float(readAverage(voltPin));
  float myConv =  4.63 / 1023.00;
  myVolts = (myRead * 2 * myConv * 1.0811);
  Serial.println(myVolts);
  return (myVolts);
}
void loop() {
  static bool lowVolts = false;
  float curVolts;
  curVolts = readVolts();
  if (curVolts <= 6.5) {
    lowVolts  = true; // If battery is running low, LEDs will flasw 3 times, not one for mail  indication

  }
  testCheck();  // Check for test mode request
  if  ((millis() > testTimeout) && testMode > 0) {// Return to normal mode after 1 minute  of test mode
    testMode = 0;
    Light(OFF);
    boxWasOpened = true;//  want to ensure check
  }
  if (testMode == 0) {// Normal mail display mode

    if (digitalRead(doorPin) == HIGH) {// Stop mail indication when door is opened
      digitalWrite(ledPin, LOW);
      mailInBox = false;// will be set to true  once door is closed
    }
    if (readAverage(sensePin >= 25)) {// Can be  due to EITHER door being opened

      boxWasOpened = true;
      while  (readAverage(sensePin) >= 25) {
        //do nothing until door is closed again
      }

    }
    if (boxWasOpened && digitalRead(doorPin) == LOW) {
      delay(200);
      if (boxWasOpened && digitalRead(doorPin) == LOW) {
        //delay(2000);
        mailInBox  = CheckMail(mailInBox);// Actual mail  check
        boxWasOpened = false;
      }

    }

    Serial.println();
    Serial.println(mailInBox);
    Serial.println();
    if (mailInBox ==  true) {// Mail Present in Box
      LED(ON);
      Serial.println("LED ON");
      delay(100);
      LED(OFF);

      if (lowVolts) {// Blink 3 times  instead of one for low voltage
        delay(200);
        LED(ON);
        delay(100);
        LED(OFF);
        delay(200);
        LED(ON);
        delay(100);
        LED(OFF);



      }

      Serial.println(readAverage(sensePin));
      //delay(2350);
      sleep2();

    }
    else {
      LED(OFF);

      delay(200);
      sleepNow();// No mail, go to hard sleep 
    }
  }
  else if (testMode == 1) {  //  Test mode 1 display
    // curVolts =  readVolts();
    int myVall;
    myVall = readAverage(sensePin);

    showVolts(curVolts);
    //flash(5);
    delay (2000);
  }

  else if (testMode > 1) {  //  Test modes 2, 3 display
    Light (testMode == 2);// light on if testmode is  3
    int myVall;
    myVall = readAverage(sensePin);
    Serial.print("Light  Value ");
    Serial.println(myVall);
    showSenseRead(myVall);
    delay(2000);
  }
}

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