Method for sending serial data to Uno via cellular connection

Projects General Guidance
1

Hi, I'd appreciate anyone's thoughts on this as it's the final piece of this project. I've been trying to send hex data via serial from my Uno to a r/c car receiver (updates every 20ms, sent at 100k baud). This works great right now, as I manually type in this data into my sketch and upload. Next, however, I'd like to be able to modify the datastream given to the Uno via cellular internet (not wifi). Ideally this could be driven by analog joystick that I'd use to send inputs to the receiver over cell.

Much of the existing info I've found involves wifi, or sending from arduino to a webserver- just not quite my situation. I am aware there is a GSM module such as the SIM800L, which looks promising. However, I'm not sure how to manipulate this for something other than sending SMS.

Thanks for an input, and apologies in advance for anything I've missed so far.

2

Your mobile device has to connect out to your nominated data source.
You can’t connect in via IP without special provisions.

Once that data circuit is in place, you can pass data as much as you want , but must check the connection hasn’t dropped for any reason.

For this reason, it’s a good idea to buffer your outgoing data, so you can resend it if the carrier is lost & reestablished.

3

Thanks for reaching out, I believe I understand what you're saying. You mentioned it being difficult to connect via IP, so what options do I have either in terms of the special IP provisions you mentioned or other different methods to send this data over cell? Or is this just essentially a dead end? Thanks again for the help.

4

What is the distance between transmitter and receiver?

5

You need a fixed IP on your fixed installation, then receive the mobile data call with that.

Don’t disconnect, typically you’re charged by volume, not by connection duration.