Please change the Wi-Fi name (SSID), Wi-Fi password, Bot Token, Chat ID, and Mac Address before using it.
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <Ticker.h>
#include <WiFiUdp.h>
WiFiUDP UDP;
#include <WakeOnLan.h>
WakeOnLan WOL(UDP);
HTTPClient https;
Ticker watchdogTimer;
int watchdogTimeSec = 300;
Ticker blinker;
int blinkerTimeSec = 1;
int blinkerCountCurrent = 0;
int blinkerCountLimit = 5;
const int ledPin = 03;
int ledStatus = 0;
void watchdogCallback(){
Serial.println("Watchdog timer expired. Restarting...");
ESP.restart(); // Restart the device
}
void blinkerCallback(){
blinkerCountCurrent++;
if(blinkerCountCurrent > 4){
digitalWrite(ledPin, HIGH);
}
if(blinkerCountCurrent > blinkerCountLimit){
blinkerCountCurrent = 0;
digitalWrite(ledPin, LOW);
}
}
// Wifi network station credentials
#define WIFI_SSID "Wifi Name"
#define WIFI_PASSWORD "Wifi Password"
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "3534534535345:asdasgdw23y9ry2huwersdfsfd"
const unsigned long BOT_MTBS = 500; // mean time between scan messages
X509List cert(TELEGRAM_CERTIFICATE_ROOT);
WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);
unsigned long bot_lasttime; // last time messages' scan has been done
int DELAY_CONST = 100;
String admin_chat_id = "chat_id_434"; // Use this bot to get chat id <https://t.me/chat_id_echo_bot>
String chat_id = admin_chat_id;
int first_run = 1;
void wakeMyPC() {
const char *MACAddress = "xx:xx:xx:xx:xx:xx";
WOL.sendMagicPacket(MACAddress); // Send Wake On Lan packet with the above MAC address. Default to port 9.
// WOL.sendMagicPacket(MACAddress, 7); // Change the port number
}
void wakeOfficePC() {
const char *MACAddress = "xx:xx:xx:xx:xx:xx";
const char *secureOn = "xx:xx:xx:xx:xx:xx";
WOL.sendSecureMagicPacket(MACAddress, secureOn); // Send Wake On Lan packet with the above MAC address and SecureOn feature. Default to port 9.
// WOL.sendSecureMagicPacket(MACAddress, secureOn, 7); // Change the port number
}
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(admin_chat_id != chat_id){
bot.sendMessage(chat_id, "You're not authorized!", "");
bot.sendMessage(admin_chat_id, "Unauthorized!\\nID: " + chat_id, "");
return;
}
if (text == "/pcon") {
digitalWrite(ledPin, HIGH); // turn the LED on (HIGH is the voltage level)
ledStatus = 1;
// bot.sendMessage(chat_id, "Led is ON", "");
delay(500);
digitalWrite(ledPin, LOW);
ledStatus = 0;
wakeMyPC();
bot.sendMessage(chat_id, "PC_ON Done", "");
}
else if (text == "/pcoff") {
ledStatus = 0;
digitalWrite(ledPin, HIGH); // turn the LED on (HIGH is the voltage level)
ledStatus = 1;
delay(2500);
digitalWrite(ledPin, LOW);
ledStatus = 0;
bot.sendMessage(chat_id, "PC_OFF Done", "");
} else if (text == "/status") {
if (ledStatus) {
bot.sendMessage(chat_id, "Led is ON", "");
} else {
bot.sendMessage(chat_id, "Led is OFF", "");
}
} else if (text.indexOf("/change_delay") != -1) {
// Find the position of the space character after the command
int spacePos = text.indexOf(" ", 0);
// If a space character is found
if (spacePos != -1) {
// Extract the delay value from the text
String delayString = text.substring(spacePos + 1);
// Convert the delay value to an integer
int newDelay = delayString.toInt();
// Update the DELAY_CONST variable
DELAY_CONST = newDelay;
bot.sendMessage(chat_id, "Delay updated to " + String(DELAY_CONST) + " ms");
} else {
bot.sendMessage(chat_id, "Please specify a delay value");
}
} else if (text == "/status_all") {
String pinStatus = "Pin: STATUS";
int status = 0;
for (int pin = 0; pin <= 16; pin++) {
status = digitalRead(pin);
pinStatus += String(pin) + ": " + String(status) + "\\n";
}
bot.sendMessage(chat_id, pinStatus);
} else //if (text == "/start")
{
Serial.println(from_name);
String welcome = "Welcome to Universal Arduino Telegram Bot library, " + from_name + ".\\n";
welcome += "This is Flash Led Bot example.\\n\\n";
welcome += "/pcon : to switch the Led ON\\n";
welcome += "/pcoff : to switch the Led OFF\\n";
welcome += "/status : Returns current status of LED\\n";
welcome += "/status_all: Returns all pins current status\\n";
welcome += "/change_delay: Changes delay between checking messages";
bot.sendMessage(chat_id, welcome);
}
}
}
void setup() {
Serial.begin(9600);
Serial.println();
pinMode(ledPin, OUTPUT); // initialize digital ledPin as an output.
// attempt to connect to Wifi network:
configTime(0, 0, "pool.ntp.org"); // get UTC time via NTP
blinker.attach(blinkerTimeSec, blinkerCallback);
watchdogTimer.attach(watchdogTimeSec, watchdogCallback);
Serial.print("Connecting to Wifi SSID ");
Serial.print(WIFI_SSID);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.print("\\nWiFi connected. IP address: ");
Serial.println(WiFi.localIP());
watchdogTimer.detach();
watchdogTimer.attach(watchdogTimeSec, watchdogCallback);
secured_client.setTrustAnchors(&cert); // Add root certificate for api.telegram.org
}
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);
watchdogTimer.detach();
watchdogTimer.attach(watchdogTimeSec, watchdogCallback);
Serial.println("Watchdog timer reset..." + String(watchdogTimeSec) + " seconds!");
}
bot_lasttime = millis();
}
delay(DELAY_CONST);
}
Generic 8266. More Info here.UniversalTelegramBot and WakeOnLan from the libraries section.