Create lightswitch.ino

Author: sfgabe

RentersLightSwitch/lightswitch.ino

@@ -0,0 +1,223 @@
+/* Works with NODEMCU, SG90 servo, and micro PIR sensor */
+
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include <Servo.h>
+#include <ArduinoOTA.h>
+#include <ArduinoJson.h>
+
+// Update these with values suitable for your network.
+const char* ssid = "WIFINETWORK";
+const char* password = "WIFIPASSWORD";
+const char* mqtt_server = "MQTTSERVER.local";
+const char* mqtt_username = "MQTT_USERNAME";
+const char* mqtt_password = "MQTT_PASSWORD";
+const int mqtt_port = 1883;
+const int BUFFER_SIZE = 300;
+bool stateOn = false;
+int pirValue;
+int pirStatus;
+int stateStatus;
+String switchStatus;
+String motionStatus;
+char message_buff[100];
+
+
+#define PIN_SERVO  D1 
+#define PIN_PIR  D5
+
+const char* on_cmd = "ON";
+const char* off_cmd = "OFF";
+
+/**************************** FOR OTA **************************************************/
+#define SENSORNAME "lightswitch" //change this to whatever you want to call your device
+#define OTApassword "OTA_PASSWORD" //the password you will need to enter to upload remotely via the ArduinoIDE
+int OTAport = 8266;
+
+/************* MQTT TOPICS (change these topics as you wish)  **************************/
+const char* switch_state_topic = "lightswitch/current";
+const char* switch_set_topic = "lightswitch/set";
+
+Servo myservo;  // create servo object to control a servo
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+void setup_wifi() {
+   delay(100);
+  // We start by connecting to a WiFi network
+    Serial.print("Connecting to ");
+    Serial.println(ssid);
+    WiFi.begin(ssid, password);
+    while (WiFi.status() != WL_CONNECTED) 
+    {
+      delay(500);
+      Serial.print(".");
+    }
+  randomSeed(micros());
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void callback(char* topic, byte* payload, unsigned int length) 
+{
+  Serial.print("Command from MQTT broker : [");
+  Serial.print(topic);
+  Serial.print(" Message is:");
+  for(int i=0;i<length;i++)
+  {
+    if((int)payload[i]>194||(int)payload[i]<0)
+    break;
+    myservo.write((int)payload[i]);
+    delay(1000);
+    myservo.write(65);// tell servo to go to neutral
+    Serial.print((int)payload[i]);//print the rotation angle for debug
+    Serial.print("]");
+    Serial.println();
+  
+    if (payload[0] == 51 && stateStatus != 1) {
+      switchStatus = "OFF";
+      sendState();
+      stateStatus = 1;
+    }
+
+    if (payload[0] == 80 && stateStatus != 2) {
+      switchStatus = "ON";
+      sendState();
+      stateStatus = 2;
+    }
+  }
+}//end callback
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) 
+  {
+    Serial.print("Attempting MQTT connection...");
+    // Create a random client ID
+    String clientId = "lightswitch-";
+    clientId += String(random(0xffff), HEX);
+    // Attempt to connect
+    //if you MQTT broker has clientID,username and password
+    //please change following line to    if (client.connect(clientId,userName,passWord))
+    if (client.connect(SENSORNAME, mqtt_username, mqtt_password))
+    {
+      Serial.println("connected");
+     //once connected to MQTT broker, subscribe command if any
+      client.subscribe(switch_set_topic);
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 6 seconds before retrying
+      delay(6000);
+    }
+  }
+} //end reconnect()
+
+/* JSON */
+bool processJson(char* message) {
+  StaticJsonBuffer<BUFFER_SIZE> jsonBuffer;
+
+  JsonObject& root = jsonBuffer.parseObject(message);
+
+  if (!root.success()) {
+    Serial.println("parseObject() failed");
+    return false;
+  }
+
+  if (root.containsKey("state")) {
+    if (strcmp(root["state"], on_cmd) == 0) {
+      stateOn = true;
+    }
+    else if (strcmp(root["state"], off_cmd) == 0) {
+      stateOn = false;
+    }
+  }
+}
+
+/* SEND STATE */
+void sendState() {
+  StaticJsonBuffer<BUFFER_SIZE> jsonBuffer;
+
+  JsonObject& root = jsonBuffer.createObject();
+
+  root["state"] = (String)switchStatus;
+  root["motion"] = (String)motionStatus;
+
+  char buffer[root.measureLength() + 1];
+  root.printTo(buffer, sizeof(buffer));
+
+  Serial.println(buffer);
+  client.publish(switch_state_topic, buffer, true);
+}
+
+/* CHECK SENSOR */
+bool checkBoundSensor(float newValue, float prevValue, float maxDiff) {
+  return newValue < prevValue - maxDiff || newValue > prevValue + maxDiff;
+}
+
+void setup() {
+  Serial.begin(115200);
+  pinMode(PIN_PIR, INPUT);
+  setup_wifi();
+  client.setServer(mqtt_server, mqtt_port);
+  client.setCallback(callback);
+  myservo.attach(PIN_SERVO);  // attaches the servo on pin D1 to the servo object
+
+/* OTA SETUP */
+  ArduinoOTA.setPort(OTAport);
+  // Hostname defaults to esp8266-[ChipID]
+  ArduinoOTA.setHostname(SENSORNAME);
+
+  // No authentication by default
+  ArduinoOTA.setPassword((const char *)OTApassword);
+
+  ArduinoOTA.onStart([]() {
+    Serial.println("Starting");
+  });
+  ArduinoOTA.onEnd([]() {
+    Serial.println("\nEnd");
+  });
+  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
+    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
+  });
+  ArduinoOTA.onError([](ota_error_t error) {
+    Serial.printf("Error[%u]: ", error);
+    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
+    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
+    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
+    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
+    else if (error == OTA_END_ERROR) Serial.println("End Failed");
+  });
+  ArduinoOTA.begin();
+
+/* WIFI SETUP */
+  Serial.println("Ready");
+  Serial.print("IP Address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void loop() {
+  if (!client.connected()) {
+    reconnect();
+  }
+  client.loop();
+  ArduinoOTA.handle();
+    //PIR CODE
+    pirValue = digitalRead(PIN_PIR); //read state of the
+
+/* PIR STATUS */
+    if (pirValue == LOW && pirStatus != 1) {
+      motionStatus = "standby";
+      sendState();
+      pirStatus = 1;
+    }
+
+    else if (pirValue == HIGH && pirStatus != 2) {
+      motionStatus = "motion detected";
+      sendState();
+      pirStatus = 2;
+    }
+}