#include <WiFi.h>
#include <PubSubClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ArduinoJson.h>
#include <SimpleTimer.h>
#include "time.h"
#include <FastBot.h>
//https://github.com/GyverLibs/FastBot
//https://mqtt.org/
//https://github.com/knolleary/pubsubclient
#define BOT_TOKEN "6780587077:AAGfuAjlpo__OTIEb-kCSRe8dQCd1jEZPis"
#define CHAT_ID "460540516"
FastBot bot(BOT_TOKEN);
SimpleTimer timer_ds18b20(2000);
SimpleTimer timer_main(5000);
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";
const int mqtt_port = 1884;
const char* mqtt_topic = "TOIP/lab4/boiler/temperature"; // MQTT topic to subscribe and publish
const char* mqtt_username = "wo";
const char* mqtt_password = "writeonly";
const int DS18D20_PIN = 33; // GPIO pin where DHT22 is connected
OneWire oneWire(DS18D20_PIN);
DallasTemperature sensors(&oneWire);
WiFiClient espClient;
PubSubClient client(espClient);
const long gmtOffset_sec = 3 * 3600;
const int daylightOffset_sec = 0;
String temperature;
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password, 5);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void setup() {
Serial.begin(115200);
bot.setChatID(CHAT_ID);
bot.attach(messageParser);
setup_wifi();
client.setServer(mqtt_server, mqtt_port);
sensors.begin();
// Initialize and get the time
configTime(gmtOffset_sec, daylightOffset_sec, "pool.ntp.org");
temperature = getTemperature();
Serial.println("Temperature: " + temperature);
}
void messageParser(FB_msg& msg) {
if (msg.text == "/current_temperature") {
bot.sendMessage("Current temperature: " + temperature);
}
}
void loop() {
bot.tick();
if (!client.connected()) {
reconnect();
}
client.loop();
if (timer_ds18b20.isReady()) {
temperature = getTemperature();
timer_ds18b20.reset();
}
if(timer_main.isReady()){
client.publish(mqtt_topic, temperature.c_str());
Serial.println("Temperature published: " + temperature);
timer_main.reset();
}
}
float getTemperature() {
sensors.requestTemperatures();
return sensors.getTempCByIndex(0);
}
String printLocalTime(){
struct tm timeinfo;
if(!getLocalTime(&timeinfo)){
Serial.println("Failed to obtain time");
return "Failed to obtain time";
}
char output[30];
strftime(output, 30, "%d, %m, %Y %H:%M:%S", &timeinfo);
return output;
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Create a random client ID
String clientId = "ESPClient-";
clientId += String(random(0xffff), HEX);
// Attempt to connect
if (client.connect(clientId.c_str(), mqtt_username, mqtt_password)) {
Serial.println("connected");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}