#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
// Wifi network station credentials
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "6941741151:AAH6GOhN0WnUQlAHAc8P09kO-8bLXDV_7d4"
const unsigned long BOT_MTBS = 1000; // mean time between scan messages
WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);
unsigned long bot_lasttime; // last time messages' scan has been done
const int ledPin_red = 5;
const int ledPin_yellow = 16;
const int ledPin_green = 17;
int greenStatus = 0;
int redStatus =0;
int yellowStatus =0;
void handleNewMessages(int numNewMessages)
{
Serial.print("handleNewMessages ");
Serial.println(numNewMessages);
for (int i = 0; i < numNewMessages; i++)
{
String chat_id = bot.messages[i].chat_id;
String text = bot.messages[i].text;
String from_name = bot.messages[i].from_name;
if (from_name == "")
from_name = "Guest";
if (text == "/redon")
{
digitalWrite(ledPin_red, HIGH); // turn the LED on (HIGH is the voltage level)
redStatus = 1;
bot.sendMessage(chat_id, "RED is ON", "");
}
if (text == "/redoff")
{
redStatus = 0;
digitalWrite(ledPin_red, LOW); // turn the LED off (LOW is the voltage level)
bot.sendMessage(chat_id, "RED is OFF", "");
}
//
if (text == "/yellowon")
{
digitalWrite(ledPin_yellow, HIGH); // turn the LED on (HIGH is the voltage level)
yellowStatus = 1;
bot.sendMessage(chat_id, "Yellow is ON", "");
}
if (text == "//yellowoff")
{
yellowStatus = 0;
digitalWrite(ledPin_yellow, LOW); // turn the LED off (LOW is the voltage level)
bot.sendMessage(chat_id, "Yellow is OFF", "");
}
//2green
if (text == "/greenon")
{
digitalWrite(ledPin_green, HIGH); // turn the LED on (HIGH is the voltage level)
greenStatus = 1;
bot.sendMessage(chat_id, "Green is ON", "");
}
if (text == "/greenoff")
{
greenStatus = 0;
digitalWrite(ledPin_green, LOW); // turn the LED off (LOW is the voltage level)
bot.sendMessage(chat_id, "Green OFF", "");
}
if (text == "/status")
{
if (redStatus==1)
{
bot.sendMessage(chat_id, "Red is ON", "");
}
if (redStatus==0)
{
bot.sendMessage(chat_id, "Red is OFF", "");
}
if (yellowStatus==1)
{
bot.sendMessage(chat_id, "yellow is ON", "");
}
if (yellowStatus==0)
{
bot.sendMessage(chat_id, "Yellow is OFF", "");
}
if (greenStatus==1)
{
bot.sendMessage(chat_id, "Green is ON", "");
}
if (greenStatus==0)
{
bot.sendMessage(chat_id, "Green is OFF", "");
}
}
if (text == "/start")
{
String welcome = "Welcome to lab2 DFN40312, " + from_name + ".\n";
welcome += "CODES BY NASRUL\n\n";
welcome += "/redon : to switch the Led RED ON\n";
welcome += "/redoff : to switch the Led RED OFF\n";
welcome += "/yellowon : to switch the Led YELLOW ON\n";
welcome += "/yellowoff : to switch the Led YELLOW OFF\n";
welcome += "/greenon : to switch the Led GREEN ON\n";
welcome += "/greenoff : to switch the Led GREEN OFF\n";
welcome += "/status : Returns current status of LED\n";
bot.sendMessage(chat_id, welcome, "Markdown");
}
}
}
void setup()
{
Serial.begin(115200);
Serial.println();
pinMode(ledPin_red, OUTPUT); // initialize digital ledPin as an output.
pinMode(ledPin_green, OUTPUT); // initialize digital ledPin as an output.
pinMode(ledPin_yellow, OUTPUT); // initialize digital ledPin as an output.
//delay(10);
// digitalWrite(ledPin_red, HIGH); // initialize pin as off (active LOW)
// attempt to connect to Wifi network:
Serial.print("Connecting to Wifi SSID ");
Serial.print(WIFI_SSID);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
secured_client.setCACert(TELEGRAM_CERTIFICATE_ROOT); // Add root certificate for api.telegram.org
while (WiFi.status() != WL_CONNECTED)
{
Serial.print(".");
delay(500);
}
Serial.print("\nWiFi connected. IP address: ");
Serial.println(WiFi.localIP());
Serial.print("Retrieving time: ");
configTime(0, 0, "pool.ntp.org"); // get UTC time via NTP
time_t now = time(nullptr);
while (now < 24 * 3600)
{
Serial.print(".");
delay(100);
now = time(nullptr);
}
Serial.println(now);
}
void loop()
{
if (millis() - bot_lasttime > BOT_MTBS)
{
int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
while (numNewMessages)
{
Serial.println("got response");
handleNewMessages(numNewMessages);
numNewMessages = bot.getUpdates(bot.last_message_received + 1);
}
bot_lasttime = millis();
}
}