ESP8266 Multisensor Shield with Node-RED
===========Esp8266程式================
/*********
Rui Santos
Complete project details at https://randomnerdtutorials.com
*********/
// Load libraries
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
// Update these with values suitable for your network.
//const char *ssid = "PTS-2F";
//const char *pass = "PTS6662594";
const char *ssid = "74170287";
const char *pass = "24063173";
//const char *ssid = "alex9ufo";
//const char *pass = "alex9981";
// Change the variable to your Raspberry Pi IP address, so it connects to your MQTT broker
const char* mqtt_server = "broker.mqtt-dashboard.com"; //ip address or hostname of the mqtt broker
// MQTT Broker IP example
//const char* mqtt_server = "192.168.1.144";
// Initializes the espClient. You should change the espClient name if you have multiple ESPs running in your home automation system
WiFiClient espClient;
PubSubClient client(espClient);
// Variable to hold the temperature reading
String temperatureString = "";
#define BUILTIN_LED D0 // Arduino standard is GPIO13 but lolin nodeMCU is 2
// Set GPIOs for: output variable, status LED, PIR Motion Sensor, and LDR
const int output = D1 ;
const int statusLed = BUILTIN_LED ;
const int motionSensor = D2;
const int ldr = A0;
// Store the current output state
String outputState = "off";
// GPIO where the DS18B20 is connected to
const int oneWireBus = D4;
// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(oneWireBus);
// Pass our oneWire reference to Dallas Temperature sensor
DallasTemperature sensors(&oneWire);
// Timers - Auxiliary variables
unsigned long now = millis();
unsigned long lastMeasure = 0;
boolean startTimer = false;
unsigned long currentTime = millis();
unsigned long previousTime = 0;
//==========================================================================================
// Don't change the function below.
// This function connects your ESP8266 to your router
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("WiFi connected - ESP IP address: ");
Serial.println(WiFi.localIP());
}
//==========================================================================================
// This functions is executed when some device publishes a message to a topic that your ESP8266 is subscribed to
// Change the function below to add logic to your program, so when a device publishes a message to a topic that
// your ESP8266 is subscribed you can actually do something
void callback(String topic, byte* message, unsigned int length) {
Serial.print("Message arrived on topic: ");
Serial.print(topic);
Serial.print(". Message: ");
String messageTemp;
for (int i = 0; i < length; i++) {
Serial.print((char)message[i]);
messageTemp += (char)message[i];
}
Serial.println();
// Feel free to add more if statements to control more GPIOs with MQTT
// If a message is received on the topic esp8266/output, you check if the message is either on or off.
// Turns the output according to the message received
if(topic=="alex9ufo/esp8266/output"){
Serial.print("Changing output to ");
if(messageTemp == "#on"){
digitalWrite(output, LOW);
Serial.print("#on");
}
else if(messageTemp == "#off"){
digitalWrite(output, HIGH);
Serial.print("#off");
}
}
Serial.println();
}
//==========================================================================================
// This functions reconnects your ESP8266 to your MQTT broker
// Change the function below if you want to subscribe to more topics with your ESP8266
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Create a random client ID
String clientId = "ESP8266Client-";
clientId += String(random(0xffff), HEX);
// Attempt to connect
if (client.connect(clientId.c_str())) {
Serial.println("connected");
// Subscribe or resubscribe to a topic
// You can subscribe to more topics (to control more outputs)
client.subscribe("alex9ufo/esp8266/output");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
//==========================================================================================
// Checks if motion was detected and the sensors are armed. Then, starts a timer.
void detectsMovement() {
Serial.println("MOTION DETECTED!");
client.publish("alex9ufo/esp8266/motion", "MOTION DETECTED!");
previousTime = millis();
startTimer = true;
}
//==========================================================================================
void setup() {
// Start the DS18B20 sensor
sensors.begin();
// Serial port for debugging purposes
Serial.begin(115200);
// PIR Motion Sensor mode, then set interrupt function and RISING mode
pinMode(motionSensor, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(motionSensor), detectsMovement, RISING);
// Initialize the output variable and the LED as OUTPUTs
pinMode(output, OUTPUT);
pinMode(statusLed, OUTPUT);
digitalWrite(output, HIGH);
digitalWrite(statusLed, LOW);
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
}
//==========================================================================================
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
// Timer variable with current time
now = millis();
// Publishes new temperature and LDR readings every 30 seconds
if (now - lastMeasure > 30000) {
lastMeasure = now;
sensors.requestTemperatures();
// Temperature in Celsius degrees
temperatureString = String(sensors.getTempCByIndex(0));
// Uncomment the next line for temperature in Fahrenheit degrees
//temperatureString = String(sensors.getTempFByIndex(0));
// Publishes Temperature values
client.publish("alex9ufo/esp8266/temperature", temperatureString.c_str());
Serial.println("Temperature published");
// Publishes LDR values
client.publish("alex9ufo/esp8266/ldr", String(analogRead(ldr)).c_str());
Serial.println("LDR values published");
}
// After 10 seconds have passed since motion was detected, publishes a "No motion" message
if ((now - previousTime > 10000) && startTimer) {
client.publish("alex9ufo/esp8266/motion", "No motion");
Serial.println("Motion stopped");
startTimer = false;
}
}
//==========================================================================================
=================Node-RED 程式====================
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