Read message :
(chat_id is in response of this request, it contains all
messages sent by anyone till now, on this bot)
https://api.telegram.org/bot{bot_token}/getUpdates
Write Message :
(bot_chatID will define, whom to send message,
and bot_token will define who will send message)
https://api.telegram.org/bot{bot_token}/sendMessage?chat_id={bot_chatID}&parse_mode=Markdown&text={bot_message}
Where to find the Telegram
Api Key
?
Go to :
@BotFather