This project creates a driveway alert system that detects vehicles or people approaching your property and sends a notification to a receiver inside your home. It’s perfect for long driveways, rural properties, or anywhere you want to know when someone arrives.<\/p>\n
Difficulty:<\/strong> Intermediate A weatherproof PIR sensor is placed at the driveway entrance. When a vehicle or person passes by, it sends a wireless signal to a receiver unit inside the house. The receiver can play a chime, flash an LED, or send a notification to your phone. For long driveways (up to 100m), LoRa or ESP-NOW is used; for shorter distances, 433MHz RF modules work well.<\/p>\n \u7b49\u65b9\u9762Digital Pins<\/th>\n<\/tbody>\n \u8868<\/p>\n For shorter driveways (up to 100m), use NRF24L01 modules:<\/p>\n For remote driveway sensors, add solar charging:<\/p>\n This driveway alert system provides early warning of visitors, packages, or intruders. With wireless communication, it’s easy to install even on long driveways.<\/p>\n","protected":false},"excerpt":{"rendered":" Project Overview This project creates a driveway alert system that detects vehicles or people approaching your property and sends a notification to a receiver inside your home. It’s perfect for long driveways, rural properties, or anywhere you want to know when someone arrives. Difficulty: Intermediate Estimated time: 2-3 hours Estimated cost: $40-60 How It Works […]<\/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-3926","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> $40-60<\/p>\nHow It Works<\/h2>\n
Materials Needed<\/h2>\n
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System Architecture<\/h2>\n
\n[Driveway Sensor] ---Wireless (LoRa\/NRF24L01)---> [House Receiver]\n | |\n PIR Sensor Buzzer\/LED\n Battery\/Solar Display\n<\/pre>\n
Circuit Diagram<\/h2>\n
Transmitter Unit<\/h3>\n
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Component<\/th>\n Pin<\/th>\n Arduino Pin<\/th>\n<\/thead>\n \nPIR Sensor<\/th>\n VCC<\/th>\n 5V<\/th>\n PIR Sensor<\/th>\n GND<\/th>\n GND<\/th>\n PIR Sensor<\/th>\n OUT<\/th>\n Digital Pin 2<\/th>\n LoRa\/NRF24L01<\/th>\n VCC<\/th>\n 3.3V<\/th>\n LoRa\/NRF24L01<\/th>\n GND<\/th>\n GND<\/th>\n LoRa\/NRF24L01<\/th>\n CS\/CE<\/th>\n Transmitter Code (ESP32 with LoRa)<\/h2>\n
\/\/ Driveway Alert Transmitter\n#include <SPI.h>\n#include <LoRa.h>\n\nconst int pirPin = 2;\nconst int csPin = 5;\nconst int rstPin = 14;\nconst int dio0Pin = 2;\n\nunsigned long lastSendTime = 0;\nconst unsigned long sendCooldown = 30000; \/\/ 30 seconds between alerts\n\nvoid setup() {\n Serial.begin(115200);\n pinMode(pirPin, INPUT);\n \n LoRa.setPins(csPin, rstPin, dio0Pin);\n if (!LoRa.begin(915E6)) { \/\/ Use 868E6 for Europe, 915E6 for US\n Serial.println(\"LoRa init failed\");\n while (1);\n }\n \n Serial.println(\"Driveway Transmitter Ready\");\n delay(60000); \/\/ PIR warm-up\n}\n\nvoid sendAlert() {\n LoRa.beginPacket();\n LoRa.print(\"MOTION\");\n LoRa.print(\",\");\n LoRa.print(millis());\n LoRa.endPacket();\n Serial.println(\"Alert sent\");\n}\n\nvoid loop() {\n bool motion = digitalRead(pirPin) == HIGH;\n \n if (motion && (millis() - lastSendTime > sendCooldown)) {\n lastSendTime = millis();\n sendAlert();\n delay(2000); \/\/ Wait for transmission\n }\n \n delay(100);\n}\n<\/code><\/pre>\nReceiver Code (ESP32 with LoRa and Display)<\/h2>\n
\/\/ Driveway Alert Receiver\n#include <SPI.h>\n#include <LoRa.h>\n#include <Wire.h>\n#include <LiquidCrystal_I2C.h>\n\nLiquidCrystal_I2C lcd(0x27, 16, 2);\n\nconst int csPin = 5;\nconst int rstPin = 14;\nconst int dio0Pin = 2;\nconst int buzzerPin = 4;\nconst int ledPin = 13;\n\nint alertCount = 0;\nunsigned long lastAlertTime = 0;\nconst unsigned long alertDuration = 5000; \/\/ 5 seconds\n\nvoid setup() {\n Serial.begin(115200);\n pinMode(buzzerPin, OUTPUT);\n pinMode(ledPin, OUTPUT);\n digitalWrite(buzzerPin, LOW);\n digitalWrite(ledPin, LOW);\n \n lcd.init();\n lcd.backlight();\n lcd.setCursor(0, 0);\n lcd.print(\"Driveway Monitor\");\n lcd.setCursor(0, 1);\n lcd.print(\"Ready\");\n \n LoRa.setPins(csPin, rstPin, dio0Pin);\n if (!LoRa.begin(915E6)) {\n lcd.clear();\n lcd.print(\"LoRa init failed\");\n while (1);\n }\n \n Serial.println(\"Receiver Ready\");\n}\n\nvoid triggerAlert() {\n alertCount++;\n lastAlertTime = millis();\n \n digitalWrite(ledPin, HIGH);\n tone(buzzerPin, 2000, 500);\n \n lcd.clear();\n lcd.setCursor(0, 0);\n lcd.print(\"Vehicle detected!\");\n lcd.setCursor(0, 1);\n lcd.print(\"Count: \");\n lcd.print(alertCount);\n \n Serial.printf(\"Alert #%d\\n\", alertCount);\n}\n\nvoid loop() {\n int packetSize = LoRa.parsePacket();\n if (packetSize) {\n String message = \"\";\n while (LoRa.available()) {\n message += (char)LoRa.read();\n }\n if (message.startsWith(\"MOTION\")) {\n triggerAlert();\n }\n }\n \n if (millis() - lastAlertTime > alertDuration && digitalRead(ledPin) == HIGH) {\n digitalWrite(ledPin, LOW);\n lcd.clear();\n lcd.setCursor(0, 0);\n lcd.print(\"System Ready\");\n lcd.setCursor(0, 1);\n lcd.print(\"Total alerts: \");\n lcd.print(alertCount);\n }\n \n delay(100);\n}\n<\/code><\/pre>\nAlternative: NRF24L01 Version (Shorter Range)<\/h2>\n
#include <SPI.h>\n#include <nRF24L01.h>\n#include <RF24.h>\n\nRF24 radio(7, 8); \/\/ CE, CSN\nconst byte address[6] = \"00001\";\n\nvoid setup() {\n radio.begin();\n radio.openWritingPipe(address);\n radio.setPALevel(RF24_PA_MAX);\n radio.stopListening();\n}\n\nvoid sendAlert() {\n const char text[] = \"MOTION\";\n radio.write(&text, sizeof(text));\n}\n<\/code><\/pre>\nSolar Power for Transmitter<\/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