This project creates a low-power security system specifically designed for RVs, motorhomes, and campers. When motion is detected inside or around your vehicle, the system sends an SMS alert to your phone and can trigger an alarm. The system is designed for low power consumption to preserve battery when off-grid.<\/p>\n
Difficulty:<\/strong> Intermediate One or more PIR sensors monitor entry points and interior of the RV. When motion is detected, the ESP32 wakes from p, sends an SMS via GSM module, sounds a siren, and logs the event. The system uses p to conserve battery.<\/p>\n OUT<\/th>\n GPIO 4<\/th>\n OUT<\/th>\n GPIO 5<\/th>\n –<\/th>\n GPIO 16<\/th>\n –<\/th>\n GPIO 17<\/th>\n Positive<\/th>\n GPIO 2<\/th>\n Anode<\/th>\n GPIO 15<\/th>\n<\/tbody>\n \u8868<\/p>\n This RV security system provides peace of mind when camping or storing your vehicle with SMS alerts.<\/p>\n","protected":false},"excerpt":{"rendered":" Project Overview This project creates a low-power security system specifically designed for RVs, motorhomes, and campers. When motion is detected inside or around your vehicle, the system sends an SMS alert to your phone and can trigger an alarm. The system is designed for low power consumption to preserve battery when off-grid. Difficulty: Intermediate 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-4142","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> $35-50<\/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 \nInterior PIR<\/th>\n Exterior PIR<\/th>\n SIM800L TX<\/th>\n SIM800L RX<\/th>\n Buzzer\/Siren<\/th>\n Status LED<\/th>\n Arduino Code<\/h2>\n
\/\/ RV Security System with SMS Alerts\n#include <WiFi.h>\n#include <SoftwareSerial.h>\n\nconst int interiorPirPin = 4;\nconst int exteriorPirPin = 5;\nconst int sirenPin = 2;\nconst int ledPin = 15;\n\nSoftwareSerial gsm(16, 17);\n\nconst char* phoneNumber = \"+1234567890\";\nbool armed = true;\nunsigned long lastAlertTime = 0;\nconst unsigned long alertCooldown = 600000;\n\nvoid setup() {\n Serial.begin(115200);\n gsm.begin(9600);\n \n pinMode(interiorPirPin, INPUT);\n pinMode(exteriorPirPin, INPUT);\n pinMode(sirenPin, OUTPUT);\n pinMode(ledPin, OUTPUT);\n \n digitalWrite(sirenPin, LOW);\n digitalWrite(ledPin, LOW);\n \n sendATCommand(\"AT\", 1000);\n sendATCommand(\"AT+CMGF=1\", 1000);\n sendATCommand(\"AT+CNMI=2,2,0,0,0\", 1000);\n \n delay(60000);\n sendSMS(\"RV Security System ONLINE\");\n}\n\nvoid sendATCommand(String cmd, int timeout) {\n gsm.println(cmd);\n delay(timeout);\n while (gsm.available()) Serial.write(gsm.read());\n}\n\nvoid sendSMS(String message) {\n gsm.print(\"AT+CMGS=\\\"\");\n gsm.print(phoneNumber);\n gsm.println(\"\\\"\");\n delay(500);\n gsm.print(message);\n delay(500);\n gsm.write(26);\n delay(3000);\n}\n\nvoid activateAlarm(String location) {\n if (millis() - lastAlertTime > alertCooldown) {\n lastAlertTime = millis();\n \n String msg = \"ALERT: Motion detected at \" + location + \" in your RV!\";\n sendSMS(msg);\n \n if (armed) {\n for (int i = 0; i < 10; i++) {\n digitalWrite(sirenPin, HIGH);\n digitalWrite(ledPin, HIGH);\n delay(200);\n digitalWrite(sirenPin, LOW);\n digitalWrite(ledPin, LOW);\n delay(200);\n }\n }\n }\n}\n\nvoid loop() {\n bool interiorMotion = digitalRead(interiorPirPin) == HIGH;\n bool exteriorMotion = digitalRead(exteriorPirPin) == HIGH;\n \n if (armed) {\n if (interiorMotion) activateAlarm(\"Interior\");\n if (exteriorMotion) activateAlarm(\"Exterior\");\n }\n \n delay(100);\n}\n<\/code><\/pre>\nLow-Power p Version<\/h2>\n
#include <esp_sleep.h>\n\nRTC_DATA_ATTR bool alarmSent = false;\n\nvoid setup() {\n esp_sleep_enable_ext0_wakeup((gpio_num_t)interiorPirPin, 1);\n esp_sleep_enable_ext1_wakeup((1ULL << exteriorPirPin), ESP_EXT1_WAKEUP_ANY_HIGH);\n \n if (esp_sleep_get_wakeup_cause() != ESP_SLEEP_WAKEUP_UNDEFINED) {\n bool interior = digitalRead(interiorPirPin) == HIGH;\n bool exterior = digitalRead(exteriorPirPin) == HIGH;\n \n if (!alarmSent) {\n gsm.begin(9600);\n sendATCommand(\"AT\", 1000);\n sendATCommand(\"AT+CMGF=1\", 1000);\n \n String location = interior ? \"Interior\" : \"Exterior\";\n sendSMS(\"ALERT: Motion at \" + location + \" in RV!\");\n alarmSent = true;\n \n for (int i = 0; i < 10; i++) {\n digitalWrite(ledPin, HIGH);\n delay(250);\n digitalWrite(ledPin, LOW);\n delay(250);\n }\n }\n }\n \n if (millis() > 3600000) alarmSent = false;\n esp_deep_sleep_start();\n}\n<\/code><\/pre>\nInstallation Steps<\/h2>\n
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Project Extensions<\/h2>\n
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Conclusion<\/h2>\n