Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
ESP8266でMQTTブローカを経由しmyThingsにメッセージを投げる
#include <ESP8266WiFi.h>
#include <DHT.h>
#include <PubSubClient.h>
#include <aJSON.h>
#define DHTPIN 4
#define DHTTYPE DHT11
const char* ssid = "WIFI_SSID";
const char* password = "WIFI_PASS";
const char* mqtt_server = "MESHBLU";
const char* mqtt_clientid = "esp8266";
const char* mqtt_user = "MESHBLU_TRIGGER_UUID";
const char* mqtt_passwd = "MESHBLU_TRIGGER_PASS";
const char* mqtt_topic = "message";
const char* mqtt_action = "MESHBLU_ACTION_UUID";
DHT dht(DHTPIN, DHTTYPE);
WiFiClient client;
PubSubClient mqtt(client);
void setup() {
Serial.begin(115200);
delay(10);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
dht.begin();
mqtt.setServer(mqtt_server, 1883);
}
void loop() {
connect_mqtt();
float h = dht.readHumidity();
float t = dht.readTemperature();
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" *C");
aJsonObject* root = aJson.createObject();
aJsonObject* devices = aJson.createArray();
aJson.addItemToArray(devices, aJson.createItem(mqtt_action));
aJson.addItemToObject(root, "devices", devices);
aJsonObject* payload = aJson.createObject();
aJson.addNumberToObject(payload, "humidity", h);
aJson.addNumberToObject(payload, "temperature", t);
aJson.addItemToObject(root, "payload", payload);
char* msg = aJson.print(root);
Serial.println(msg);
mqtt.publish(mqtt_topic, msg);
delay(5000);
}
void connect_mqtt() {
if (mqtt.connected()) {
return;
}
mqtt.connect(mqtt_clientid, mqtt_user, mqtt_passwd);
while (!mqtt.connected()) {
Serial.println("failed to connect to mqtt broker");
mqtt.disconnect();
delay(2000);
mqtt.connect(mqtt_clientid, mqtt_user, mqtt_passwd);
}
Serial.println("succeeded to connect to mqtt broker");
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment