The Pill Dispenser 1.0

Automatic pill dispenser set for certain time intervals, with function for reminding to replace pills and buzzer.

May 30, 2022

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home automation

smart appliances

Components and supplies

Buzzer, Piezo

Positional Micro Servo

Resistor 220 ohm

Quad OR Gate

Alphanumeric LCD, 16 x 2

5 mm LED: Red

Arduino Leonardo

Grove - 12-Channel Capacitive Touch Keypad (ATtiny1616)

Apps and platforms

Tinkercad

Project description

Code

Code for the pill dispenser

c_cpp

1#include <Keypad.h>
2#include <LiquidCrystal.h>
3#include <Servo.h>
4
5Servo  servoA;
6Servo servoB;
7Servo servoC;
8
9int led1 = 0;
10int led2 = 1;
11int  led3 = 2;
12
13LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);
14
15const byte ROWS  =4;
16const byte COLS =4;
17char hexaKeys[ROWS][COLS] ={
18  {'1','2','3','A'},
19  {'4','5','6','B'},
20  {'7','8','9','C'},
21  {'*','0','#','D'}
22};
23byte  rowPins[ROWS] ={10,9,8,7};
24byte colPins[COLS] ={6,5,4,3}; 
25
26Keypad Tastenfeld=Keypad(
27  makeKeymap(hexaKeys),rowPins,colPins,ROWS,COLS);
28  
29char InputA;
30char  InputB;
31int C_per;
32int A_per;
33int B_per;
34bool flag=true;
35long A_times[10]  = {};
36long B_times[10] = {};
37long C_times[10] = {};
38int PillA_amt = 100;
39int  PillB_amt = 100;
40int PillC_amt = 100;
41long counter = 0;
42long seconds;
43long  minutes;
44long hours;
45
46long set_a_time(String prompt = "Enter Time:"){
47  lcd.clear();
48  String time = "";
49  String eingabe;
50  char Taste;
51  long return_value;
52  bool first = true;
53  //SET THE TIME
54  lcd.print(prompt);
55  lcd.setCursor(0, 1);
56  lcd.print("18:30 as 1830!");
57  lcd.setCursor(0,  0);
58  //loop until he entered a time
59  while(time == "") {
60    flag=true;
61    eingabe = "";
62    lcd.print(prompt);
63    lcd.setCursor(0, 1);
64    //loop  until there are 4 key inputs
65    for(int i = 0; i < 4;){
66      Taste = Tastenfeld.getKey();
67      //If key is pressed, check if it is the first key 
68      //and clear the  lcd if thats the case
69      if(Taste){
70        if(first){
71          lcd.print("               ");
72          lcd.setCursor(0, 1);
73          first = false;
74        }
75        lcd.print(Taste);
76        eingabe += Taste;
77        i++;
78      }
79    }
80    lcd.clear();
81    lcd.setCursor(0,0);
82    long timing  = eingabe.toInt();
83    String minute_str = eingabe.substring(2,4);
84    String  hour_str = eingabe.substring(0,2);
85    long hour_check = hour_str.toInt();
86    long minute_check = minute_str.toInt();
87    return_value = hour_check*3600  + minute_check*60;
88    //check if the time is valid
89    if(timing<2401&&minute_check<60){
90      //if it is ask user to save time
91      lcd.print("Save time with *");
92      lcd.setCursor(0,1);
93      if(hour_check<10){
94        lcd.print(0);
95      }
96      lcd.print(hour_check);
97      lcd.print(":");
98      if(minute_check<10){
99        lcd.print(0);
100      }
101      lcd.print(minute_check);
102      while(flag)  {
103        Taste = Tastenfeld.getKey();
104        if(Taste) {
105          if(Taste  == '*') {
106             lcd.clear();
107             lcd.setCursor(0,0);
108             lcd.print("Time  saved");
109             delay(1000);
110             lcd.clear();
111             time  = eingabe;
112             flag=false;
113          }//closes if(Taste == '*')
114          else if(Taste == '#') {
115            time ="";
116            lcd.clear();
117            lcd.setCursor(0,0);
118            flag=false;
119          }//closes  else if ()
120        }//closes if(Taste)
121      }//closes while(flag)
122    }//closes  if(timing<2401)
123    else{
124      time ="";
125      lcd.clear();
126      lcd.setCursor(0,0);
127    }//closes else
128  }//closes while(time == "")
129  return(return_value);
130}
131
132void  setup() {
133  servoA.write(0);
134  servoB.write(0);
135  servoC.write(0);
136  pinMode(led1, OUTPUT);
137  pinMode(led2, OUTPUT);
138  pinMode(led3, OUTPUT);
139  // put your setup code here, to run once:
140  // set up the LCD's number of columns  and rows:
141  lcd.begin(16, 2);
142  // set up all the LEDs as OUTPUT
143//Set  the pill timings
144  delay(10);
145  lcd.setCursor(0,0);    
146  lcd.print("How  often do");
147  lcd.setCursor(0,1);
148  lcd.print("you take Pill A?");
149  for(int i=0;i<3;){
150    InputA = Tastenfeld.getKey();
151    lcd.setCursor(14,1);
152    if(i==2 && InputA){
153      C_per = InputA - 48;
154      i++;
155    }
156    if(i==1 && InputA){
157      B_per = InputA - 48;
158      lcd.print("C?");
159      i++;
160    }
161    if(i==0 && InputA){
162      A_per = InputA - 48;
163      lcd.print("B?");
164      i++;
165    }     
166  }
167
168  lcd.clear();
169  for(int i = 0;i<A_per;i++){
170    A_times[i] = set_a_time("Pill A) "+String(i+1)+".  time.");
171  }
172  for(int i = 0;i<B_per;i++){
173    B_times[i] = set_a_time("Pill  B) "+String(i+1)+". time.");
174  }
175  for(int i = 0;i<C_per;i++){
176    C_times[i]  = set_a_time("Pill C) "+String(i+1)+". time.");
177  }
178  lcd.setCursor(0,0);    
179  lcd.print("How many Pill A");
180  lcd.setCursor(0,1);
181  lcd.print("did  you put in?");
182  for(int i=0;i<3;i++){
183    bool confirmed = true;
184    bool  fir = true;
185    String number = "";
186    while(confirmed){
187      InputB  = Tastenfeld.getKey();
188      if(InputB){
189        if(fir){
190          lcd.clear();
191          lcd.print("Confirm with *");
192          lcd.setCursor(0,1);
193          fir=false;
194        }
195        lcd.print(InputB);
196        number+=InputB;
197        if(i==2  && InputB == '*'){
198          PillC_amt = number.toInt();
199          confirmed=false;
200        }
201        if(i==1 && InputB == '*'){
202          PillB_amt = number.toInt();
203          lcd.clear();
204          lcd.setCursor(0,0);    
205          lcd.print("How  many Pill C");
206          lcd.setCursor(0,1);
207          lcd.print("did you  put in?");
208          confirmed=false;
209        }
210        if(i==0 && InputB  == '*'){
211          PillA_amt = number.toInt();
212          lcd.clear();
213          lcd.setCursor(0,0);    
214          lcd.print("How many Pill B");
215          lcd.setCursor(0,1);
216          lcd.print("did you put in?");
217          confirmed=false;
218        }  
219      }
220    }
221  }
222  lcd.clear();
223  counter = set_a_time();
224  lcd.clear();
225}
226
227
228
229void loop() {
230  counter = counter+1;
231  seconds  = counter;
232  hours = seconds/3600;
233  seconds = seconds%3600;
234  minutes  = seconds/60;
235  seconds = seconds%60;
236  delay(1000);
237  lcd.setCursor(4,0);
238  if(hours<10){
239    lcd.print(0);       
240  }
241  lcd.print(hours);
242  lcd.print(":");
243  
244  if(minutes<10){
245    lcd.print(0);
246  }
247  lcd.print(minutes);
248  lcd.print(":");
249  
250  if(seconds<10){
251    lcd.print(0);
252  }
253  lcd.print(seconds);
254  lcd.print("    ");
255  lcd.setCursor(0,1);
256  if(PillA_amt <= 10){
257    digitalWrite(led1,  HIGH);
258  }
259  if(PillB_amt <= 10){
260    digitalWrite(led2, HIGH);
261  }
262  if(PillC_amt <= 10){
263    digitalWrite(led3, HIGH);
264  }
265  for(int i =  0; i<A_per; i++){
266    if(A_times[i] == counter){
267      servoA.attach(11);  
268      servoA.write(180);
269      delay(2000);
270      servoA.write(90);
271      delay(2000);
272      PillA_amt--;
273      servoA.detach();
274    }
275  }   
276  for(int i = 0; i<B_per; i++){
277    if(B_times[i] == counter){      
278      servoB.attach(12); 
279      servoB.write(180);
280      delay(2000);
281      servoB.write(90);
282      delay(2000);
283      PillB_amt--;
284      servoB.detach();  
285    }
286  }  
287  for(int i = 0; i<C_per; i++){
288    if(C_times[i] == counter){
289      servoC.attach(13);
290      servoC.write(180);
291      delay(2000);
292      servoC.write(0);
293      delay(2000);
294      PillC_amt--;
295      servoC.detach();
296    }
297  }  
298}
299/*
300#include <Servo.h>
301Servo myservo;
302Servo myservo2;
303Servo  myservo3;
304int pos = 0;    
305
306void setup() {
307  myservo.attach(11); 
308  myservo2.attach(12); 
309  myservo3.attach(13); 
310}
311
312void loop() {
313  for (pos = 0; pos <= 180; pos += 1) { 
314    // in steps of 1 degree
315    myservo.write(pos);  
316    myservo2.write(pos);
317    myservo3.write(pos);
318    delay(15);                  
319  }
320  for (pos = 180; pos >= 0; pos -= 1) {
321    myservo.write(pos);  
322    myservo2.write(pos);
323    myservo3.write(pos);
324    delay(15);                     
325  }
326}
327*/

#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Servo.h>

Servo  servoA;
Servo servoB;
Servo servoC;

int led1 = 0;
int led2 = 1;
int  led3 = 2;

LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);

const byte ROWS  =4;
const byte COLS =4;
char hexaKeys[ROWS][COLS] ={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte  rowPins[ROWS] ={10,9,8,7};
byte colPins[COLS] ={6,5,4,3}; 

Keypad Tastenfeld=Keypad(
  makeKeymap(hexaKeys),rowPins,colPins,ROWS,COLS);
  
char InputA;
char  InputB;
int C_per;
int A_per;
int B_per;
bool flag=true;
long A_times[10]  = {};
long B_times[10] = {};
long C_times[10] = {};
int PillA_amt = 100;
int  PillB_amt = 100;
int PillC_amt = 100;
long counter = 0;
long seconds;
long  minutes;
long hours;

long set_a_time(String prompt = "Enter Time:"){
  lcd.clear();
  String time = "";
  String eingabe;
  char Taste;
  long return_value;
  bool first = true;
  //SET THE TIME
  lcd.print(prompt);
  lcd.setCursor(0, 1);
  lcd.print("18:30 as 1830!");
  lcd.setCursor(0,  0);
  //loop until he entered a time
  while(time == "") {
    flag=true;
    eingabe = "";
    lcd.print(prompt);
    lcd.setCursor(0, 1);
    //loop  until there are 4 key inputs
    for(int i = 0; i < 4;){
      Taste = Tastenfeld.getKey();
      //If key is pressed, check if it is the first key 
      //and clear the  lcd if thats the case
      if(Taste){
        if(first){
          lcd.print("               ");
          lcd.setCursor(0, 1);
          first = false;
        }
        lcd.print(Taste);
        eingabe += Taste;
        i++;
      }
    }
    lcd.clear();
    lcd.setCursor(0,0);
    long timing  = eingabe.toInt();
    String minute_str = eingabe.substring(2,4);
    String  hour_str = eingabe.substring(0,2);
    long hour_check = hour_str.toInt();
    long minute_check = minute_str.toInt();
    return_value = hour_check*3600  + minute_check*60;
    //check if the time is valid
    if(timing<2401&&minute_check<60){
      //if it is ask user to save time
      lcd.print("Save time with *");
      lcd.setCursor(0,1);
      if(hour_check<10){
        lcd.print(0);
      }
      lcd.print(hour_check);
      lcd.print(":");
      if(minute_check<10){
        lcd.print(0);
      }
      lcd.print(minute_check);
      while(flag)  {
        Taste = Tastenfeld.getKey();
        if(Taste) {
          if(Taste  == '*') {
             lcd.clear();
             lcd.setCursor(0,0);
             lcd.print("Time  saved");
             delay(1000);
             lcd.clear();
             time  = eingabe;
             flag=false;
          }//closes if(Taste == '*')
          else if(Taste == '#') {
            time ="";
            lcd.clear();
            lcd.setCursor(0,0);
            flag=false;
          }//closes  else if ()
        }//closes if(Taste)
      }//closes while(flag)
    }//closes  if(timing<2401)
    else{
      time ="";
      lcd.clear();
      lcd.setCursor(0,0);
    }//closes else
  }//closes while(time == "")
  return(return_value);
}

void  setup() {
  servoA.write(0);
  servoB.write(0);
  servoC.write(0);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  // put your setup code here, to run once:
  // set up the LCD's number of columns  and rows:
  lcd.begin(16, 2);
  // set up all the LEDs as OUTPUT
//Set  the pill timings
  delay(10);
  lcd.setCursor(0,0);    
  lcd.print("How  often do");
  lcd.setCursor(0,1);
  lcd.print("you take Pill A?");
  for(int i=0;i<3;){
    InputA = Tastenfeld.getKey();
    lcd.setCursor(14,1);
    if(i==2 && InputA){
      C_per = InputA - 48;
      i++;
    }
    if(i==1 && InputA){
      B_per = InputA - 48;
      lcd.print("C?");
      i++;
    }
    if(i==0 && InputA){
      A_per = InputA - 48;
      lcd.print("B?");
      i++;
    }     
  }

  lcd.clear();
  for(int i = 0;i<A_per;i++){
    A_times[i] = set_a_time("Pill A) "+String(i+1)+".  time.");
  }
  for(int i = 0;i<B_per;i++){
    B_times[i] = set_a_time("Pill  B) "+String(i+1)+". time.");
  }
  for(int i = 0;i<C_per;i++){
    C_times[i]  = set_a_time("Pill C) "+String(i+1)+". time.");
  }
  lcd.setCursor(0,0);    
  lcd.print("How many Pill A");
  lcd.setCursor(0,1);
  lcd.print("did  you put in?");
  for(int i=0;i<3;i++){
    bool confirmed = true;
    bool  fir = true;
    String number = "";
    while(confirmed){
      InputB  = Tastenfeld.getKey();
      if(InputB){
        if(fir){
          lcd.clear();
          lcd.print("Confirm with *");
          lcd.setCursor(0,1);
          fir=false;
        }
        lcd.print(InputB);
        number+=InputB;
        if(i==2  && InputB == '*'){
          PillC_amt = number.toInt();
          confirmed=false;
        }
        if(i==1 && InputB == '*'){
          PillB_amt = number.toInt();
          lcd.clear();
          lcd.setCursor(0,0);    
          lcd.print("How  many Pill C");
          lcd.setCursor(0,1);
          lcd.print("did you  put in?");
          confirmed=false;
        }
        if(i==0 && InputB  == '*'){
          PillA_amt = number.toInt();
          lcd.clear();
          lcd.setCursor(0,0);    
          lcd.print("How many Pill B");
          lcd.setCursor(0,1);
          lcd.print("did you put in?");
          confirmed=false;
        }  
      }
    }
  }
  lcd.clear();
  counter = set_a_time();
  lcd.clear();
}



void loop() {
  counter = counter+1;
  seconds  = counter;
  hours = seconds/3600;
  seconds = seconds%3600;
  minutes  = seconds/60;
  seconds = seconds%60;
  delay(1000);
  lcd.setCursor(4,0);
  if(hours<10){
    lcd.print(0);       
  }
  lcd.print(hours);
  lcd.print(":");
  
  if(minutes<10){
    lcd.print(0);
  }
  lcd.print(minutes);
  lcd.print(":");
  
  if(seconds<10){
    lcd.print(0);
  }
  lcd.print(seconds);
  lcd.print("    ");
  lcd.setCursor(0,1);
  if(PillA_amt <= 10){
    digitalWrite(led1,  HIGH);
  }
  if(PillB_amt <= 10){
    digitalWrite(led2, HIGH);
  }
  if(PillC_amt <= 10){
    digitalWrite(led3, HIGH);
  }
  for(int i =  0; i<A_per; i++){
    if(A_times[i] == counter){
      servoA.attach(11);  
      servoA.write(180);
      delay(2000);
      servoA.write(90);
      delay(2000);
      PillA_amt--;
      servoA.detach();
    }
  }   
  for(int i = 0; i<B_per; i++){
    if(B_times[i] == counter){      
      servoB.attach(12); 
      servoB.write(180);
      delay(2000);
      servoB.write(90);
      delay(2000);
      PillB_amt--;
      servoB.detach();  
    }
  }  
  for(int i = 0; i<C_per; i++){
    if(C_times[i] == counter){
      servoC.attach(13);
      servoC.write(180);
      delay(2000);
      servoC.write(0);
      delay(2000);
      PillC_amt--;
      servoC.detach();
    }
  }  
}
/*
#include <Servo.h>
Servo myservo;
Servo myservo2;
Servo  myservo3;
int pos = 0;    

void setup() {
  myservo.attach(11); 
  myservo2.attach(12); 
  myservo3.attach(13); 
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1) { 
    // in steps of 1 degree
    myservo.write(pos);  
    myservo2.write(pos);
    myservo3.write(pos);
    delay(15);                  
  }
  for (pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);  
    myservo2.write(pos);
    myservo3.write(pos);
    delay(15);                     
  }
}
*/

Downloadable files

Video

Video of input, pill dispensing and LED lights in action.

Video

Mechanics Image

Image showing how the smint dispenser and micro servers work to dispense the "pills"

Mechanics Image

Circuit Diagram

Diagram of our circuit

Circuit Diagram

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