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#include <DHTesp.h> | |
#include "Adafruit_MQTT.h" | |
#include "Adafruit_MQTT_Client.h" | |
#include <ESP8266WiFi.h> | |
#define LOOP_MS 60000 | |
#define DhtPin 14 | |
DHTesp dht; | |
#define ssid "my_network" | |
#define pwd "my_password" | |
WiFiClient client; | |
#define MQTT_SERVER "my mqtt broker" | |
#define MQTT_TOPIC "my mqtt topic" | |
Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, 1883, "", ""); | |
Adafruit_MQTT_Publish pub = Adafruit_MQTT_Publish(&mqtt, MQTT_TOPIC); | |
// convert celcius to fahrenheit | |
inline float c_to_f(float c) { return 1.8 * c + 32; } | |
void MQTT_connect() { | |
if (mqtt.connected()) | |
return; | |
const uint8_t retries = 3; | |
int8_t ret; | |
for (int i = 0; i < retries; i++) { | |
if ((ret = mqtt.connect()) == 0) | |
return; | |
delay(5000); | |
} | |
while(1); // couldn't connect. die and wait for WDT to reset | |
} | |
void setup() { | |
dht.setup(DhtPin, DHTesp::DHT11); | |
WiFi.begin(ssid, pwd); | |
while (WiFi.status() != WL_CONNECTED) | |
delay(500); | |
} | |
void loop() { | |
MQTT_connect(); | |
TempAndHumidity lastValues = dht.getTempAndHumidity(); | |
pub.publish(c_to_f(lastValues.temperature)); | |
delay(LOOP_MS); | |
} |
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