esp32 rabbit
/*
Basic ESP8266 MQTT publish client example
*/
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
// Update these with values suitable for your network.
const char* ssid = "your_ssid";
const char* password = "your_password";
const char* mqtt_server = "192.168.0.121";
const char* mqtt_user = "admin1";
const char* mqtt_pass= "admin1";
const int mq2pin = A0; //the MQ2 analog input pin
WiFiClient espClient;
PubSubClient client(espClient);
void setup_wifi() {
// Connecting to a WiFi network
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void reconnect() {
// Loop until we're reconnected
Serial.println("In reconnect...");
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect("Arduino_Gas", mqtt_user, mqtt_pass)) {
Serial.println("connected");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
delay(5000);
}
}
}
void setup() {
Serial.begin(9600);
setup_wifi();
client.setServer(mqtt_server, 1883);
}
void loop() {
char msg[8];
if (!client.connected()) {
reconnect();
}
sprintf(msg,"%i",analogRead(mq2pin));
client.publish("mq2_mqtt", msg);
Serial.print("MQ2 gas value:");
Serial.println(msg);
delay(5000);
}