Code:<\/h4>\n\/*\r\n Project Titles: Daily Reminder Box\r\n\r\n Project Creator: Weiwen \"Andy\" Jiang\r\n\r\n Description: Real Time Clock activates the rest of the device when the time is between 9 pm and 11:59 pm.The Arduino first checks for whether or not the mechanism has been triggered or not. If not, the outside IR sensor checks if subjects are approaching the box. If anyone is approaching, the box snaps back the solenoid and releases the lid while activating a buzzer every one second. Then the buzzer continues to beep until the book is removed from the box. The inside IR sensor would detect that removal and stop the buzzer and the solenoid, also marking the mechanism as \"triggered already\" for the day through a boolean variable.\r\n\r\n Pin mapping:\r\n Arduino pin | role | description\r\n ------------|--------|-------------\r\n A0 input Outside IR proximity sensor\r\n A1 input Inside IR proximity sensor\r\n 4 output Buzzer\r\n 9 output Solenoid\r\n SCL SCL of Real Time Clock\r\n SDA SDA of Real Time Clock\r\n\r\n\r\n Real Time Clock code adapted from: https:\/\/create.arduino.cc\/projecthub\/MisterBotBreak\/how-to-use-a-real-time-clock-module-ds3231-bc90fe\r\n Comment formatting adapted from: Siddarth Parthiban\r\n*\/\r\n\r\n#include <config.h>\r\n#include \"ds3231.h\"\r\n#include <Wire.h>\r\n\r\n\/\/Initialising structure t for the Real Time Clock\r\nstruct ts t;\r\n\r\n\/\/Initializing pin ports for Arduino\r\nconst int IROutPin = A0;\r\nconst int IRInPin = A1;\r\nconst int SolePin = 9;\r\nconst int BuzzerPin = 4;\r\n\r\n\/\/Initialising other variables\r\nint currentHour;\r\nint irInVal;\r\nint irOutVal;\r\nint irT = 0;\r\n\r\n\/\/Setting up boolean variables that stores the status of the box\r\nbool trigger = 0; \/\/Stores the status of the buzzer and solenoid\r\nbool removed = 0; \/\/Stores the status of the book\r\nbool done = 0; \/\/Stores whether or not the mechanism has been triggered for the day\r\n\r\n\/\/Initialising time variables\r\nunsigned long prevBuzztime = 0;\r\nunsigned long prevRTCtime = 0;\r\n\r\n\r\nvoid setup() {\r\n Serial.begin(9600);\/\/Setting data rate\r\n Wire.begin();\/\/Setting up wire library\r\n\r\n \/\/Setting up pin mapping\r\n pinMode(IROutPin, INPUT);\r\n pinMode(IRInPin, INPUT);\r\n pinMode(SolePin, OUTPUT);\r\n pinMode(BuzzerPin, OUTPUT);\r\n\r\n \/\/Setting up real time clock\r\n DS3231_init(DS3231_CONTROL_INTCN);\r\n t.hour = 22;\r\n t.min = 10;\r\n t.sec = 0;\r\n t.mday = 20;\r\n t.mon = 2;\r\n t.year = 2022;\r\n}\r\n\r\nvoid loop() {\r\n\r\n \/\/Read IR proximity sensor input for every 1\/4 second\r\n if (millis() - irT >= 250) {\r\n irOutVal = analogRead(A0);\r\n irInVal = analogRead(A1);\r\n }\r\n\r\n \/\/Read real time clock input for every second\r\n if (millis() - prevRTCtime >= 1000) {\r\n DS3231_get(&t);\r\n currentHour = t.hour;\r\n prevRTCtime = millis();\r\n }\r\n\r\n \/\/Check if the box has been activated already today\r\n if (done == 0){\r\n \r\n \/\/ Activate the buzzer and solenoid when it is between 9:00 pm and 11:59 pm and if IR sensor detects subject approaching\r\n if (currentHour >= 21) {\r\n if (irOutVal > 40) {\r\n digitalWrite (SolePin, HIGH);\r\n trigger = 1; \/\/stores the status of the alarm\r\n removed = 0; \/\/stores the status of the book\r\n\r\n }\r\n }\r\n\r\n \/\/Sound the buzzer every 1 second and unlock the chest if the book has not been removed\r\n if (trigger == 1) {\r\n if (removed == 0) {\r\n if (millis() - prevBuzztime >= 1000) {\r\n if (digitalRead (BuzzerPin) == HIGH) {\r\n digitalWrite (BuzzerPin, LOW);\r\n }\r\n else {\r\n digitalWrite (BuzzerPin, HIGH);\r\n }\r\n prevBuzztime = millis();\r\n }\r\n\r\n \/\/if the inside IR sensor detects the removal of the book, stop the solenoid and the buzzer, reset the status of the boolean variables of the buzzer, solenoid and the book, change the status of the box to had been activated\r\n if (irInVal < 40) {\r\n removed = 1;\r\n digitalWrite (BuzzerPin, LOW);\r\n trigger = 0;\r\n digitalWrite (SolePin, LOW);\r\n done = 1;\r\n }\r\n\r\n }\r\n\r\n }\r\n }\r\n \/\/reset the status of the box to haven't been activated for today at 12am\r\n if (currentHour == 0){\r\n done = 0;\r\n}\r\n}<\/pre>\n <\/p>\n","protected":false},"excerpt":{"rendered":"
This box reminds the user to write something down at the end of every day to entice journaling habits! This video demonstrates how the box works. The box…<\/p>\n","protected":false},"author":206,"featured_media":15367,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[89],"tags":[],"_links":{"self":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/posts\/15311"}],"collection":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/users\/206"}],"replies":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/comments?post=15311"}],"version-history":[{"count":9,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/posts\/15311\/revisions"}],"predecessor-version":[{"id":15434,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/posts\/15311\/revisions\/15434"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/media\/15367"}],"wp:attachment":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/media?parent=15311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/categories?post=15311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2022\/work\/wp-json\/wp\/v2\/tags?post=15311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}