Embedded Files
Smart Garage Door is DIY project that converts existing Manual/Remote controlled garage door operation to be controlled by a smart device connected to internet from anywhere. The project uses Arduino you can choose any programming interface for your choice. Concepts remain same.
Advantages: Controls (Open/Close) garage door from anywhere any time, Check status of garage door from anywhere any time
Build Alternate: Buy a garage door motor that comes bundled with smart apps or smart garage door controllers.Project concept idea is based upon that garage door panels open towards the garage roof. When Garage door is open the distance between the garage roof and folded door panel is less compared to when garage door is closed. So by measuring the distance between garage roof and door panel it can be determined if garage door is open or closed.
Cost < $25 USD
Build Time < 1 day
Unlimited opportunity for Perfection & Enhancements to suite your automation cravings
Device Components/Parts:
- A/C Power Supply < $3 (USD): 2A Power Adapter 12W DC 12V Voltage Transfomer
- D/C power module < $1 (USD): 3.3V 5V dual Power Supply Module
- wifi enabled processing unit < $3 (USD) : NodeMCU V3 ESP8266
- distance sensor < $1 (USD) :Ultrasonic HC-SR04 distance sensor
- Relay Switch < $1 (USD): 5V low Level Trigger One Channel Relay Module
- USB connection Wire < $2 (USD): long wire to connect to computer
- Connecting wires < $4 (USD): Wires with breadboard
- PCB board < $5 (USD): Set of various sizes
Software:
- Arduino free. You can choose to code online or download from https://www.arduino.cc/en/Main/Software
Assembly:
Recommend to use breadboard to start and test. Once every thing working then only use pcb and soldering
NodeMCU:
NodeMcu pin D1 connected to trig pin on HC-SR04Nodemcu pin D2 connected to echo pin on HC-SR04Nodemcu pin D7 connected to in pin of 5V relayNodemcu pin GND connected to 3V -ve terminal of power supply module (Top right pin of nodemcu see image above)Nodemcu pin 3V3 connected to 3V +ve terminal of power supply module ( 2nd top right pin of nodemcu see image above)HC-SR04:
5V Relay:
Arduino Code: Make changes for your wifi and Mqtt settings/* GJs Smartn Garage Using NodeMCu esp8266, Ultra sonic HC-SR04 distance sensor, wifi, mqtt,openhab*/ #include <ESP8266WiFi.h> //Needed for wifi connection. #include <PubSubClient.h> //Needed for MQTT communication */ // define global variable // defines nodemcu pins numbers const int trigPin = 5; //NodeMcu pin D1 connected to trig pin on HC-SR04 const int echoPin = 4; //Nodemcu pin D2 connected to echo pin on HC-SR04 const int relaypin = 13; //Nodemcu pin D7 connected to in pin of relay HONGWEI 5V Low trigger // defines variables long duration; //Time takes to get ultra sonic echo back int distance; //Distance String mqttclientname; //Unique name for mqtt client String pubstr; //String for preparing message for publishing to MQTT String gdstate; //Garage door state as reported by sensor char msgpub[50]; // Need char array to publish to mqtt String incmd ; //For storing MQTT subscribe message int value = 0; //Wifi Settings - Change to your wifi Network const char* ssid = "<replace your home wifi ssid>" ; const char* passwd = "<replace with your home wifi password>" ; // MQTT Settings - Change to your MQTT broker and topic settings IPAddress mqttserver(192,168,1,253); //"Replace YourMQTTBroker's IP or servername" const char* outtopic = "GH/out/GarageDoor"; // Topic Sending garage door status to MQTT broker change and take note to your liking const char* intopic = "GH/in/GarageDoor"; // Topic Getting command from MQTT broker change and take note to your liking const char* statetopic = "GH/out/GarageDoor/State"; // Communicating Garage door status like sensor distance to MQTT broker WiFiClient NodeMCU_WiFi; //Create an instance of wifi client PubSubClient NodeMCU_MQTT_CL(mqttserver, 1883, NodeMCU_WiFi); //Create an instance of MQTT client, MQTT_sub_callback needs to be defined and gets executed when mqtt message arives void connectwifi(){ //Check and connect to wifi if (WiFi.status() != WL_CONNECTED) { Serial.print("Connecting to "); Serial.print(ssid); Serial.println("..."); WiFi.mode(WIFI_STA); WiFi.begin(ssid, passwd); //Connect to Wifi //Get Unique client name for mqtt client mqttclientname="GD-"; uint8_t mac[6]; WiFi.macAddress(mac); for (int i = 0; i < 6; ++i) { mqttclientname += String((mac[i])); } if (WiFi.waitForConnectResult() != WL_CONNECTED) return; } else { Serial.print("WiFi connected "); Serial.print(ssid); Serial.print(" IP Address:"); Serial.println(WiFi.localIP()); //Local IP } } void connectMQTT(){ //Check and connect MQTT broker if (WiFi.status() == WL_CONNECTED) { //Check wifi is still connected if (!NodeMCU_MQTT_CL.connected()) { Serial.print(" MQTT Client:"); Serial.print(mqttclientname.c_str()); //Name is derived in connectwifi Serial.print(" is connecting to MQTT broker "); Serial.print(mqttserver); Serial.print("..."); NodeMCU_MQTT_CL.connect((char*) mqttclientname.c_str()); //Try connect - Get client name from connectwifi //check status again if (!NodeMCU_MQTT_CL.connected()) { Serial.print("Not connected to MQTT broker..."); Serial.print(" Return Status:"); Serial.println(String(NodeMCU_MQTT_CL.state())); return ; } } else { Serial.print("MQTT client:"); Serial.print(mqttclientname.c_str()); Serial.print(" is connected to MQTT broker:"); Serial.println(mqttserver); Serial.print("In Topic:"); Serial.print(intopic); Serial.print(" Out Topic:"); Serial.print(outtopic); Serial.print(" State Topic:"); Serial.print(statetopic); return; } } } void MQTT_sub_callback(char* topic, byte* payload, unsigned int length) { //This gets executed everytime mqtt client.subscribe is invoked Serial.print("MQTT_Sub_callback: Message arrived in topic - "); Serial.print(topic); for (int i = 0; i < length; i++) { incmd += (char)payload[i]; //Copy in comming message to permanent variable } incmd.trim(); //Remove leading and trailing spaces if any incmd += '\0'; //Add ending null terminator to message string //InCmd.toUpperCase(); // Convert to upper case and remove spaces if any to make it case insensitive comparison Serial.print(" with length "); Serial.print(length); Serial.print(" and CMD:"); Serial.println(incmd); } // the setup function runs once when you press reset or power the board void setup() { pinMode(LED_BUILTIN, OUTPUT); // initialize digital pin LED_BUILTIN as an output. pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output pinMode(echoPin, INPUT); // Sets the echoPin as an Input pinMode(relaypin, OUTPUT); //Sets the relay pin as putput //pinMode(greenled, OUTPUT); // Sets the green led pin an Output //pinMode(redled, OUTPUT); // Sets the red led Pin as an output Serial.begin(115200); // Starts the serial communication //Connect to wifi //delay(5000); Serial.println("Iniatializing......"); //Set builtin LED on and relay off digitalWrite(LED_BUILTIN, LOW); // turn the built-in LED ON works oposite digitalWrite(relaypin, 1); // turn relay off works opposite for low trigger relay connectwifi(); //Connect to the MQTT broker delay(5000); NodeMCU_MQTT_CL.disconnect(); // Clear any old connections connectMQTT(); //MQTT subscribe callback setup NodeMCU_MQTT_CL.setCallback(MQTT_sub_callback); }void getdistance(){ distance = 0 ; // reset old value duration = 0 ; gdstate = "" ; for (int i = 0; i < 3; i++) { //Get three time for consistency results as results are comming in consistent from ultrasonic sensor digitalWrite(trigPin, LOW); // Clears the trigPin delayMicroseconds(10); // wait for 10 micro seconds digitalWrite(trigPin, HIGH); // Sets the trigPin on HIGH state to send ultrasound beam out delayMicroseconds(25); // // wait for 15 micro second for beam to come back digitalWrite(trigPin, LOW); duration = duration + pulseIn(echoPin, HIGH, 180000UL); // Reads the echoPin, returns the sound wave travel time in microseconds and add to previous reading. Not sure why 180000UL read in one of examples delayMicroseconds(50); // // wait for 50 micro second for next iteration } distance = ((duration/3)*0.034)/2; // Calculating the distance in cm keep in mind duration is sum of 3 readings so needs to take average if (distance < 60) //Garge door is OPEN if distance is less than 60cm from roof gdstate = "Open" ; else gdstate = "Close"; // Prints the distance on the Serial Monitor Serial.print("Sensor: Duration:"); Serial.print(duration); Serial.print(", Distance:"); Serial.print(distance); Serial.print(", Door state:"); Serial.println(gdstate);} // the loop function runs over and over again forever void loop() { digitalWrite(LED_BUILTIN, LOW); // turn the built-in LED ON works oposite digitalWrite(relaypin, 1) ; // Ensure relay is off //Check and connect wifi connectwifi(); //Check and connect MQTT connectMQTT(); incmd = ""; //Empty the old command/message if (!NodeMCU_MQTT_CL.subscribe(intopic)) //Check queue connection status Serial.println("Subscribe Failed..."); NodeMCU_MQTT_CL.loop(); // keeps client active and reads message // Read ultrasonic sensor getdistance(); //Publish state to broker pubstr = gdstate ; pubstr.toCharArray(msgpub,50); NodeMCU_MQTT_CL.publish(outtopic, msgpub); //Garage door status pubstr = "MQTT:" + String(NodeMCU_MQTT_CL.state()) + ",Door:" + gdstate + ", Dist.:" + String(distance) + "cm, Relay:" + String(digitalRead(relaypin)) + " and CMD: " + incmd; pubstr.toCharArray(msgpub,50); //Convert string to Char Array for publishing Serial.println(pubstr); NodeMCU_MQTT_CL.publish(statetopic, msgpub); // Garage door message // Door Logic if ((gdstate == "Open") && (incmd == "Close")) { // Close Garage door pubstr = "Closing Garage Door .....Relay:" + String(digitalRead(relaypin)) + " and CMD: " + incmd; pubstr.toCharArray(msgpub,50); //Convert string to Char Array for publishing Serial.println(pubstr); NodeMCU_MQTT_CL.publish(statetopic, msgpub); digitalWrite(relaypin, 0); // relay on delay(200); // Wait for relay to send signal digitalWrite(relaypin, 1) ; // relay off delay(1000); //Wait a second for door to close } if ((gdstate == "Close") && (incmd == "Open")) { // Open Garage door pubstr = "Opening Garage Door .....Relay:" + String(digitalRead(relaypin)) + " and CMD: " + incmd; pubstr.toCharArray(msgpub,50); //Convert string to Char Array for publishing Serial.println(pubstr); NodeMCU_MQTT_CL.publish(statetopic, msgpub); digitalWrite(relaypin, 0); // relay on delay(200); // Wait for relay to send signal digitalWrite(relaypin, 1) ; // relay off delay(1000); //Wait a second for door to close } if ( ((gdstate == "Open") && (incmd == "Open")) || ((gdstate == "Close") && (incmd == "Close")) ) { // Mismatch Command do nothing pubstr = "Door is already :" + gdstate +"..... No action for CMD: " + incmd; pubstr.toCharArray(msgpub,50); //Convert string to Char Array for publishing Serial.println(pubstr); NodeMCU_MQTT_CL.publish(statetopic, msgpub); } digitalWrite(LED_BUILTIN, HIGH); // turn the built-in LED OFF works oposite Serial.println("-*-*-*-*-*-*-*-*"); delay(500); // wait half second as loop is going too fast }Configuration: check this page under Automation Interfaces/OpenHAB configurations
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