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Modem Module

I ordered only the wifi module for my smart car and have it setup and working great. I didn't order the modem module as I didn't want another cellphone bill. Can someone give me an idea of what a monthly charge might be for this and is it a special carrier that deals with this type of device. Also if I order the modem module now will it come with a sim. I just don't want to order and find out the monthly cost is too high. Thanks in advance.

dexter's picture
Data usage depends heavily on

Data usage depends heavily on your usage profile.
Normal with a V2 server is about 2-3 MB per month.
If you send live updates to an MQTT hub or do high frequency GPS logging it will be more.

... is needed for the GPS data, right?

I have just bought and recieved my OVMS base module, OBD cable and GPS dongle/cable, configured it, and got it hooked up in my Leaf. Nice work, and a big thank you to everyone involed in this project.

The one thing I seem to be missing is getting GPS data. I think the missing piece is that I don't have a modem with the base module. Am I right in thinking that, actaully, a modem is needed to get GPS data...? If that's the case, then, darn... I completely missed that when trying to work things out <facepalm/>

(As an aside, is it worth waiting for a 4G module to be developed and released, or should I just go for the existing module? I'm not really planning on using the modem for transferring data back and forth.)

Many thanks,



dexter's picture
Modem & GPS

You're welcome :-)

Yes, unless the car provides GPS via CAN, you'll need the modem plugin for GPS.

The Leaf module needs the modem for GPS: https://docs.openvehicles.com/en/latest/components/vehicle_nissanleaf/docs/index.html

The 4G modem is being worked on right now, but no schedule yet for availability. If you don't need 4G, get a 3G one -- 2G is also supported by that as a fallback, and totally sufficient.


servant74's picture
I have an older Smart ED (2014) - what do I need to use OV today

It has some old telematics and uses 2G communications.  I would be happy using wifi and controlling/monitoring it.

Suggestions or pointers to where I should look for the right configuration fo rmy little buggy!

Stanton's picture
If your particular version of

If your particular version of the Smart ED is supported (and I see there are a couple in the list), then you can buy a base OVMS module (WiFi only) and get started until the 4G modem comes out. You can see from previous comments that this is a (recent) popular approach...and one that I am pursuing. Good luck!

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