I am planning to connect raspberry pi 3 to a simple electronic equipment. The pi would run an application collecting some data from the equipment. I would now like to send this data over the internet, say send it to a specified email. This can be ofcourse achieved by connecting the pi to a router (wifi/ ethernet).
However considering I do not have any existing router/access point connection, how can I connect the pi to the internet ? Is using the pi wifi dongle with pi 3 the only option?