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Electrical Schematic of Bowel Monitor<\/p><\/div>\n
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\/*\r\n 60-223, Project 2: Bowel Monitor\r\n James Kyle (jkyle1)\r\n time spent: Too much\r\n\r\n Collaboration and sources:\r\n 1) I watched the canvas course modules\r\n 2) Keypad tutorial: https:\/\/www.circuitbasics.com\/how-to-set-up-a-keypad-on-an-arduino\/\r\n\r\n Challenge(s): I had lots of trouble coming up with the logical \r\n variables I needed to update the display properly. I also struggled \r\n with writing the function to determine how to update the display \r\n based on the key pressed on the key pad. I ended up using the serial \r\n monitor to display the value returned by each key press and then used \r\n that value to distinguish keys.\r\n\r\n Next time: I'll start by thinking at a higher level about the user interaction \r\n before diving into the details of coding the device behavior. I will also \r\n research the components I am using more thoroughly to ensure I understand \r\n how they work.\r\n\r\n Description: This device determines whether the bathroom door is open or \r\n closed. When the door is closed, the user is able to press keys on a keypad \r\n to indicate who they are and what they are doing in the bathroom. \r\n The device then displays that information along with the time they have been \r\n in the bathroom to give others an indication of how much longer they can \r\n expect to wait to use the bathroom.\r\n\r\n\r\n Pin mapping:\r\n\r\n Arduino pin | type | description\r\n ------------|--------|-------------\r\n A0 input R4 [Keypad]\r\n A1 input R3 [Keypad]\r\n A2 input R2 [Keypad]\r\n A3 input R1 [Keypad]\r\n A4 input Reed Switch\r\n 2 output D7 LCD\r\n 3 output D6 LCD\r\n 4 output D5 LCD\r\n 5 output D4 LCD\r\n 6 output E pin LCD\r\n 7 output RS pin LCD\r\n 10 output C4 [Keypad]\r\n 11 output C3 [Keypad]\r\n 12 output C2 [Keypad]\r\n 13 output C1 [Keypad]\r\n\r\n*\/\r\n\r\n\/\/Importing necessary libraries\r\n#include <Keypad.h>\r\n#include <LiquidCrystal.h>\r\n\r\n\r\n\/***************\r\n KEYPAD SETUP\r\n ***************\/\r\n\r\n\/\/Setting up pins for key pad\r\nconst int R1 = A3;\r\nconst int R2 = A2;\r\nconst int R3 = A1;\r\nconst int R4 = A0;\r\nconst int C1 = 13;\r\nconst int C2 = 12;\r\nconst int C3 = 11;\r\nconst int C4 = 10;\r\n\r\n\/\/Setting up key pad logic\r\nconst byte ROWS = 4;\r\nconst byte COLS = 4;\r\n\r\n\/\/Creating key pad matrix\r\nchar hexaKeys[ROWS][COLS] = {\r\n {'1', '2', '3', 'A'},\r\n {'4', '5', '6', 'B'},\r\n {'7', '8', '9', 'C'},\r\n {'*', '0', '#', 'D'}\r\n};\r\n\r\nbyte rowPins[ROWS] = {R4, R3, R2, R1};\r\nbyte colPins[COLS] = {C4, C3, C2, C1};\r\n\r\n\/\/Creating key pad variable\r\nKeypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);\r\n\r\nchar customKey; \/\/variable to store key pressed\r\n\r\n\r\n\r\n\/**************\r\n LCD DISPLAY\r\n **************\/\r\n\r\n\/\/Setting up LCD\r\nLiquidCrystal lcd(2, 3, 4, 5, 6, 7);\r\n\r\n\r\n\r\n\/**************\r\n Reed Switch\r\n **************\/\r\n\r\nconst int REEDPIN = A4;\r\n\r\n\r\n\r\n\/*************\r\n Variables\r\n *************\/\r\n\r\n\/\/Variables for timing\r\nunsigned long timer = 0; \/\/overall time\r\nunsigned int timerSec = 0; \/\/time in seconds\r\nunsigned int timerMin = 0; \/\/time in minutes\r\nunsigned long prevTime = 0; \/\/previous time in miliseconds\r\nunsigned long prevTimer = 0; \/\/previous time in seconds\r\n\r\n\/\/Message variables for LCD display\r\nString useMessage; \/\/Bathroom use type\r\nString user = \"\"; \/\/Person using the bathroom\r\nString timerMessage; \/\/For displaying time in bathroom\r\nString openMessage = \"The Porcelain Throne Awaits Your Return\"; \/\/Idling message\r\n\r\n\/\/Logical variables for updating LCD display and timer\r\nbool updateUseMessage = false;\r\nbool updateTime = false;\r\nbool resetDisplay = false;\r\nbool doorOpen = false;\r\nbool lcdClearClosed = false;\r\nbool lcdClearOpen = false;\r\n\r\n\/\/Variables for timing LCD and scroll updates\r\nint displayCounter = 0;\r\nint scrollCounter = 0;\r\n\r\n\r\n\r\nvoid setup() {\r\n\r\n \/\/Initializing reed pin using pull-up\r\n pinMode(REEDPIN, INPUT_PULLUP);\r\n\r\n \/\/Debugging\r\n Serial.begin(9600);\r\n\r\n \/\/Start communicating with LCD\r\n lcd.begin(16, 2);\r\n\r\n}\r\n\r\n\r\nvoid loop() {\r\n\r\n \/\/Read Key Pad using Keypad.h\r\n customKey = customKeypad.getKey();\r\n\r\n \/\/Check if door is open or closed\r\n int doorState = digitalRead(REEDPIN);\r\n\r\n\r\n\r\n \/***********************\r\n ***Door Open Squence***\r\n ***********************\/\r\n\r\n \/\/If door is open, dislay idling message\r\n if (doorState == 1) {\r\n\r\n \/\/Clear LCD only if door was just opened and LCD hasn't been cleared yet\r\n if (lcdClearOpen == false) {\r\n lcd.clear(); \/\/clear LCD\r\n delay(100);\r\n lcd.setCursor(0, 0);\r\n lcd.print(openMessage); \/\/Display idling message\r\n delay(1000); \/\/Wait 1 second\r\n \r\n \/\/Update LCD cleared variables\r\n lcdClearOpen = true; \/\/LCD cleared after door was opened\r\n lcdClearClosed = false; \/\/LCD needs to be cleared when door opens\r\n\r\n \/\/Update timers and counters for LCD\r\n scrollCounter = 0;\r\n \r\n \/\/Reset displayed time\r\n timerSec = 0;\r\n timerMin = 0;\r\n }\r\n\r\n \/\/Scroll idling message until it reaches end of message,\r\n \/\/then wait for 1 second and return to beginning of \r\n \/\/idling message \r\n if (scrollCounter < openMessage.length() - 16) {\r\n lcd.scrollDisplayLeft();\r\n scrollCounter = scrollCounter + 1; \/\/increment scroll counter\r\n delay(500);\r\n } else { \/\/If message reaches end point\r\n scrollCounter = 0; \/\/clear LCD and reset counters\r\n lcdClearOpen = false;\r\n delay(1000);\r\n }\r\n }\r\n\r\n\r\n \/*************************\r\n ***Door Closed Squence***\r\n *************************\/\r\n\r\n \/\/If door closes, display user inputs and time on LCD\r\n else if (doorState == 0) {\r\n\r\n \/\/Starting timer\r\n timer = millis() \/ 1000 - prevTimer;\r\n\r\n \/\/Clearing LCD if door was just closed\r\n if (lcdClearClosed == false) {\r\n lcd.clear();\r\n lcdClearClosed = true;\r\n lcdClearOpen = false;\r\n prevTime = millis(); \/\/resetting relative time \r\n prevTimer = millis() \/ 1000; \/\/Conversion to seconds\r\n }\r\n\r\n \/\/only update time if one second has passed\r\n if (millis() - prevTime > 1000) {\r\n updateTime = true;\r\n prevTime = millis();\r\n\r\n \/\/Converting time from seconds to minutes and seconds\r\n timerSec += 1; \/\/incrementing seconds counter\r\n if (timerSec >= 60) {\r\n timerSec = 0;\r\n timerMin += 1; \/\/incrementing minutes counter\r\n }\r\n }\r\n\r\n \/\/update time on lcd\r\n if (updateTime == true) {\r\n lcd.setCursor(0, 1);\r\n lcd.print((String) timerMin + \" min \" + timerSec + \" sec\");\r\n lcd.setCursor(14,1);\r\n lcd.print(user);\r\n updateTime = false; \/\/resetting update variable for time\r\n }\r\n\r\n \/\/If keypad pressed, do something based on the key pressed\r\n if (customKey) {\r\n updateUseMessageFunction(customKey);\r\n }\r\n\r\n \/\/Update lcd if it needs to be updated\r\n if (updateUseMessage == true) {\r\n lcd.setCursor(0, 0);\r\n lcd.print(\" \"); \/\/Clearing current use message\r\n lcd.setCursor(0, 0);\r\n lcd.print(useMessage); \/\/Display new use message\r\n Serial.println(useMessage); \/\/debugging line for lcd screen\r\n updateUseMessage = false; \/\/resetting update variable so screen is updated only if there is a change\r\n }\r\n\r\n }\r\n\r\n}\r\n\r\n\r\n\r\n\/\/This function determines how to update the display based on the keys \r\n\/\/pressed on the key pad\r\n\r\nvoid updateUseMessageFunction(char key) {\r\n \r\n\/****************************\r\n ** Types of Bathroom Uses **\r\n ****************************\/\r\n\r\n\/\/Peeing\r\n if (int(key) == 49) {\r\n useMessage = \"Pee Pee Time! \"; \/\/Changing use message\r\n updateUseMessage = true; \/\/Indicating LCD needs to be updated\r\n }\r\n\r\n\/\/Pooping\r\n if (int(key) == 50) {\r\n useMessage = \"Poopy Time! \";\r\n updateUseMessage = true;\r\n }\r\n\r\n\/\/Diarrhea or equivalent destructive act\r\n if (int(key) == 51) {\r\n useMessage = \"Uh-oh! ;) \";\r\n updateUseMessage = true;\r\n }\r\n\r\n\/\/Washing face\r\n if (int(key) == 52) {\r\n useMessage = \"Washing Face\";\r\n updateUseMessage = true;\r\n }\r\n\r\n\/\/Brushing Teeth\r\n if (int(key) == 53) {\r\n useMessage = \"Brushing Teeth\";\r\n updateUseMessage = true;\r\n }\r\n\r\n\/\/Showering\r\n if (int(key) == 54) {\r\n useMessage = \"Showering\";\r\n updateUseMessage = true;\r\n }\r\n\r\n\/\/Clear use type on screen\r\n if (int(key) == 42) {\r\n useMessage = \" \";\r\n updateUseMessage = true;\r\n }\r\n\r\n\r\n\r\n\/***************************\r\n ** People Using Bathroom **\r\n ***************************\/\r\n\r\n\/\/James Kyle\r\n if (int(key) == 65) {\r\n user = \"JK\";\r\n updateTime = true;\r\n }\r\n\r\n\/\/Judson Kyle\r\n if (int(key) == 66) {\r\n user = \"JK\";\r\n updateTime = true;\r\n }\r\n\r\n\/\/Roommate 1\r\n if (int(key) == 67) {\r\n user = \"MR\";\r\n updateTime = true;\r\n }\r\n\r\n\/\/Roommate 2\r\n if (int(key) == 68) {\r\n user = \"LW\";\r\n updateTime = true;\r\n }\r\n\r\n}<\/pre>\n <\/p>\n
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Bowel Monitor Description: The Bowel Monitor is a device built to ease the pain of waiting for the bathroom by giving information about who’s using the bathroom,…<\/p>\n","protected":false},"author":172,"featured_media":13098,"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\/s2021\/work\/wp-json\/wp\/v2\/posts\/12987"}],"collection":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/users\/172"}],"replies":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/comments?post=12987"}],"version-history":[{"count":16,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/posts\/12987\/revisions"}],"predecessor-version":[{"id":13120,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/posts\/12987\/revisions\/13120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/media\/13098"}],"wp:attachment":[{"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/media?parent=12987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/categories?post=12987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/60-223\/s2021\/work\/wp-json\/wp\/v2\/tags?post=12987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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