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Open your Telegram Desktop App.
In the top left corner go to Search.
Type @botFather in the Search field and click in the result BotFather.
A new chat will open with the next text, click in Start button at the bottom.
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Now we can start to type commands to get a new bot, type /newbot to create a new bot.
Enter a name for the new bot, for example Telegram channel bot.
Choose a username for the bot, for example ThiioTelegramChannelBot, once done BotFather will give us a token, this will be neccesary for the next steps.
Search in the top left corner the recently created bot by typing its name, in this case we can search it by typing @thiiotelegramchannelbot, click in the result.
A new chat will start, click int the Start button at the bottom.
Once done the chat is ready to receive messages, now make a request to https://api.telegram.org/bot<token>/getUpdates to get the updates from the bot, we need the Chat ID.
The telegram channel requires the Bot Token and the Chat ID, once got them click in Save.