Hi vico3341rys8kx, welcome to Thunkable! 
Be sure to check out our posts about How to ask Great Questions v2.0, our Community Guidelines, and our Docs as you get started.
As for your questions, you would need to look into if Telegram Bot has an API that can be used. If so, then you can use the WebAPI blocks, but if there isn’t any API available, then I would recommend looking to see if Bluetooth is possible.