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#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#define wifi_ssid "YourWIfiName"
#define wifi_password "YourWifiPassword"
const char* mqttServer = "192.168.1.61"; //IP of your MQTT Server
const int mqttPort = 1883; // Port of your MQTT server
//pins change these if you used different pins
const int valve1=D1;
const int valve2=D2;
WiFiClient espClient;
PubSubClient client(espClient);
int status = WL_IDLE_STATUS;
void setup() {
Serial.begin(115200);
pinMode(valve1, OUTPUT);
pinMode(valve2, OUTPUT);
digitalWrite(valve1, HIGH);
digitalWrite(valve2, HIGH);
reconnectWifi();
client.setServer(mqttServer, mqttPort);
client.setCallback(callback);
}
void callback(char* topic, byte* payload, unsigned int length) {
char message_buff[100];
Serial.print("Message arrived in topic: ");
Serial.println(topic);
Serial.println("Message:");
int i = 0;
for (i = 0; i < length; i++) {
message_buff[i] = (char)payload[i];
}
message_buff[i] = '\0';
String msgString = String(message_buff);
Serial.println(msgString);
if (strcmp(topic, "garden/valve1") == 0)
{
if (msgString == "OFF")
digitalWrite(valve1, HIGH);
else if (msgString == "ON")
digitalWrite(valve1, LOW);
}
if (strcmp(topic, "garden/valve2") == 0)
{
if (msgString == "OFF")
digitalWrite(valve2, HIGH);
else if (msgString == "ON")
digitalWrite(valve2, LOW);
}
Serial.println("-----------------------");
}
void mqttreconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Connecting to server ...");
if ( client.connect("Valves",NULL,NULL,"status/valvecontrol",1,1,"DEAD") ) {
Serial.println( "[DONE]" );
client.publish("status/valvecontrol", "ALIVE",true);
client.subscribe("garden/#");
} else {
Serial.print( "[FAILED] [ rc = " );
Serial.print( client.state() );
Serial.println( " : retrying in 5 seconds]" );
// Wait 5 seconds before retrying
delay( 5000 );
}
}
}
void reconnectWifi()
{
if ( WiFi.status() != WL_CONNECTED) {
WiFi.begin(wifi_ssid, wifi_password);
int count = 0;
while (WiFi.status() != WL_CONNECTED) {
count++;
delay(500);
Serial.println("Connecting to WiFi..");
delay(500);
if(count>50) reconnectWifi();
}
}
}
void loop() {
reconnectWifi();
if ( !client.connected() ) {
mqttreconnect();
}
client.loop();
}
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