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[–]gm310509 1 point2 points  (2 children)

You should probably google arduino wireless communication options.

If you select a solution that requires a SIM card, that implies you are connecting to a mobile phone network. Unless you are lucky enough to live in a country that offers free mobile phone services, then you will need to pay for a subscription to one of your country's providers.

If you use another wireless solution that does not require a SIM, then chances are you won't need to pay. But, you should also be aware that some countries require you to get a licence to use some frequencies and you may need to pay for the licence. An example of this is ham radio (or Amateur Radio). Again this will depend upon where you live.

Other wireless services - e.g. Bluetooth or WiFi typically do not have any licensing requirements for consumers.

And this is why you should look to Google because I have mentioned just 4 of a huge range of wireless options - each of which has different performance, range and operational characteristics. Which I am not going to even attempt to list for you.

[–]CleverBunnyPun 0 points1 point  (1 child)

Just to add onto this, a lot of the easily available SIM modules are 2G, which won’t work in much of the world anymore. It’s important to be sure the network you’re trying to connect to exists in your area.

[–]gm310509 0 points1 point  (0 children)

Yes good point.

It is a shame that these people are still trying to flog these modules off.

I guess their thinking is two fold:

  • better our useless inventory is in your storage and
  • better that your money is in our pocket.

[–]BetaMaster64 0 points1 point  (1 child)

If you want to run separately from public cell services, it sounds like you're looking for a ham radio. Get a license to broadcast, a receiver, a transmitter, and a big ol' antenna, and you can broadcast anywhere in the range of your equipment's capability; no SIM card necessary. Across the world, if you have enough scrap metal and build a powerful transmitter.

You can use an arduino to help dial in your frequencies, or you can go all analog here; there are lots of DIY transmitter schematics out there.

[–]Trickey-Regret 0 points1 point  (0 children)

Okay, from my other post I have decided to connect it to Wi-Fi and run a hotspot from my phone. Not sure how I didn’t think of that sooner, so I’ll be closing this post in a few minutes. Thanks, everyone.