Are there any shields that allow one arduino to communicate with another arduino from hundreds of miles away, both being mobile and not hard wired to the internet. Maybe a GSM shield or something? So far with gsm shields I have only found ones that send sms messages. This is an unreliable and slow method of communication. I am looking for very fast communication. Like if one arduino could act as a web server, waiting for a request. The other arduino would then send it’s request when it needed to.
Hi,We haven’t the shields that allow one arduino to communicate with another arduino from hundreds of miles away except the ethernet&GPRS…With a happy day~