Is there an easy and economical (aka no subscription fee) means to have multiple Arduino devices on different networks send messages to one another?
such what?
Some examples of what you think are different networks. Are you thinking of accessing private networks?
I'm wanting to develop a device that I can give to family members who will have them at their homes. When they tap a button or a touch sensitive device, it will change the color on all of the devices at the different family members' homes. There are commercial "friendship lamps" that do this. As long as I can get them to communicate, the rest is easy.
Those home networks don't sound very secure if anyone can get into them to modify the components. Care to give a link to documentation about those networks?
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They're at different cities in the country and different Internet providers. I could possibly use a simple web server located on my network and open a port in my firewall to it. I just hoped there would be a public service I could use and the devices could poll the service no a periodic basis.
You can get VPN capable routers and create your own private network by linking all the routers with VPNs. You would need static IP addresses.
Thank you! I'll look into that further. That's exactly the type of service I was hoping I could implement.
I suspect it isn't, but I think a freebie Internet of Things service might do what you want.
No fartarsing about with special routers or static IP. You would need an IoT provider that allows two way traffic.
Blynk
Thing speak
Adafruit IO
are possibilities.
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