This project creates a smart laundry reminder system that detects when you enter the laundry room and reminds you if there’s a load waiting to be transferred from washer to dryer or from dryer to basket. It’s perfect for busy households where laundry often gets forgotten.<\/p>\n
Difficulty:<\/strong> Intermediate PIR sensors detect when someone enters the laundry room. The system checks the state of the washer and dryer (using vibration sensors or current sensors) and knows if there’s a completed load waiting. If laundry needs attention, it plays a voice reminder through a speaker. A display can also show the status.<\/p>\n Optional features include sending a notification to your phone and tracking laundry cycles over time.<\/p>\n \u8868<\/p>\n Create MP3 files on SD card (folder “01”):<\/p>\n This laundry reminder system eliminates forgotten loads and makes laundry day more efficient. With automatic detection and voice reminders, you’ll never leave wet clothes in the washer again.<\/p>\n","protected":false},"excerpt":{"rendered":" Project Overview This project creates a smart laundry reminder system that detects when you enter the laundry room and reminds you if there’s a load waiting to be transferred from washer to dryer or from dryer to basket. It’s perfect for busy households where laundry often gets forgotten. Difficulty: Intermediate Estimated time: 2-3 hours Estimated […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-3931","post","type-post","status-publish","format-standard","hentry","category-projects"],"blocksy_meta":[],"yoast_head":"\r\n
\nEstimated time:<\/strong> 2-3 hours
\nEstimated cost:<\/strong> $25-35<\/p>\nHow It Works<\/h2>\n
Materials Needed<\/h2>\n
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Circuit Diagram<\/h2>\n
Connection Table<\/h3>\n
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Component<\/th>\n Pin<\/th>\n ESP32 Pin<\/th>\n<\/thead>\n \nPIR Sensor<\/th>\n OUT<\/th>\n GPIO 4<\/th>\n Washer Vibration Sensor<\/th>\n OUT<\/th>\n GPIO 5<\/th>\n Dryer Vibration Sensor<\/th>\n OUT<\/th>\n GPIO 6<\/th>\n DFPlayer Mini<\/th>\n TX<\/th>\n GPIO 16<\/th>\n DFPlayer Mini<\/th>\n RX<\/th>\n GPIO 17<\/th>\n OLED Display<\/th>\n SDA<\/th>\n GPIO 21<\/th>\n OLED Display<\/th>\n SCL<\/th>\n GPIO 22<\/th>\n Red LED (Washer status)<\/th>\n Anode<\/th>\n GPIO 2<\/th>\n Green LED (Dryer status)<\/th>\n Anode<\/th>\n GPIO 15<\/th>\n<\/tbody>\n Arduino Code<\/h2>\n
\/\/ Laundry Room Reminder System\n#include <Wire.h>\n#include <Adafruit_SSD1306.h>\n#include <SoftwareSerial.h>\n#include <DFRobotDFPlayerMini.h>\n\n#define SCREEN_WIDTH 128\n#define SCREEN_HEIGHT 64\nAdafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);\n\nSoftwareSerial mySoftwareSerial(16, 17);\nDFRobotDFPlayerMini myDFPlayer;\n\nconst int pirPin = 4;\nconst int washerSensorPin = 5;\nconst int dryerSensorPin = 6;\nconst int redLedPin = 2;\nconst int greenLedPin = 15;\n\n\/\/ Laundry state variables\nbool washerRunning = false;\nbool dryerRunning = false;\nbool washerDone = false;\nbool dryerDone = false;\nunsigned long washerStopTime = 0;\nunsigned long dryerStopTime = 0;\nunsigned long lastReminderTime = 0;\nconst unsigned long reminderCooldown = 1800000; \/\/ 30 minutes between reminders\n\nvoid setup() {\n Serial.begin(115200);\n \n pinMode(pirPin, INPUT);\n pinMode(washerSensorPin, INPUT);\n pinMode(dryerSensorPin, INPUT);\n pinMode(redLedPin, OUTPUT);\n pinMode(greenLedPin, OUTPUT);\n \n digitalWrite(redLedPin, LOW);\n digitalWrite(greenLedPin, LOW);\n \n \/\/ Initialize display\n if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {\n Serial.println(\"Display not found\");\n }\n display.clearDisplay();\n display.setTextSize(1);\n display.setTextColor(SSD1306_WHITE);\n \n \/\/ Initialize DFPlayer\n mySoftwareSerial.begin(9600);\n if (!myDFPlayer.begin(mySoftwareSerial)) {\n Serial.println(\"DFPlayer error\");\n }\n myDFPlayer.volume(25);\n \n displayMessage(\"Laundry Monitor\", \"Ready\");\n Serial.println(\"Laundry Monitor Ready\");\n delay(30000); \/\/ PIR warm-up\n}\n\nvoid displayMessage(String line1, String line2) {\n display.clearDisplay();\n display.setCursor(0, 0);\n display.println(line1);\n display.setCursor(0, 20);\n display.println(line2);\n display.display();\n}\n\nvoid checkVibrationSensors() {\n \/\/ Washer detection\n bool washerVibration = digitalRead(washerSensorPin) == HIGH;\n if (washerVibration && !washerRunning) {\n washerRunning = true;\n washerDone = false;\n Serial.println(\"Washer started\");\n displayMessage(\"Washer\", \"Running...\");\n }\n if (!washerVibration && washerRunning) {\n washerRunning = false;\n washerStopTime = millis();\n washerDone = true;\n Serial.println(\"Washer finished\");\n displayMessage(\"Washer\", \"Done!\");\n digitalWrite(redLedPin, HIGH);\n }\n \n \/\/ Dryer detection\n bool dryerVibration = digitalRead(dryerSensorPin) == HIGH;\n if (dryerVibration && !dryerRunning) {\n dryerRunning = true;\n dryerDone = false;\n Serial.println(\"Dryer started\");\n displayMessage(\"Dryer\", \"Running...\");\n }\n if (!dryerVibration && dryerRunning) {\n dryerRunning = false;\n dryerStopTime = millis();\n dryerDone = true;\n Serial.println(\"Dryer finished\");\n displayMessage(\"Dryer\", \"Done!\");\n digitalWrite(greenLedPin, HIGH);\n }\n \n \/\/ Auto-clear after 1 hour\n if (washerDone && (millis() - washerStopTime > 3600000)) {\n washerDone = false;\n digitalWrite(redLedPin, LOW);\n }\n if (dryerDone && (millis() - dryerStopTime > 3600000)) {\n dryerDone = false;\n digitalWrite(greenLedPin, LOW);\n }\n}\n\nvoid playReminder() {\n if (washerDone && dryerDone) {\n myDFPlayer.play(1); \/\/ \"Both washer and dryer are done\"\n Serial.println(\"Reminder: Both loads done\");\n displayMessage(\"Reminder\", \"Both loads done!\");\n } else if (washerDone) {\n myDFPlayer.play(2); \/\/ \"Washer is done\"\n Serial.println(\"Reminder: Washer done\");\n displayMessage(\"Reminder\", \"Move washer load\");\n } else if (dryerDone) {\n myDFPlayer.play(3); \/\/ \"Dryer is done\"\n Serial.println(\"Reminder: Dryer done\");\n displayMessage(\"Reminder\", \"Take out clothes\");\n }\n}\n\nvoid loop() {\n checkVibrationSensors();\n \n bool motion = digitalRead(pirPin) == HIGH;\n \n if (motion && (washerDone || dryerDone) && \n (millis() - lastReminderTime > reminderCooldown)) {\n lastReminderTime = millis();\n playReminder();\n }\n \n \/\/ Update display with current status\n if (!motion) {\n String status1 = \"Washer: \";\n status1 += washerRunning ? \"Running\" : (washerDone ? \"DONE!\" : \"Idle\");\n String status2 = \"Dryer: \";\n status2 += dryerRunning ? \"Running\" : (dryerDone ? \"DONE!\" : \"Idle\");\n displayMessage(status1, status2);\n }\n \n delay(100);\n}\n<\/code><\/pre>\nVoice Prompt Files<\/h2>\n
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Installation Steps<\/h2>\n
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Project Extensions<\/h2>\n
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Troubleshooting<\/h2>\n
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Conclusion<\/h2>\n