In this instructable I show you how I made a intercom using a GSM module.If you press the big button, the programmed number is called. The call is ended after a programmed time, or by pressing the hangup button.Components I used:Button: https://www.aliexpress.com/item/A13-5PCS-LOT-Black…Arduino pr…By: Wim3d // Read more: original article.
