Hi,

To my knowledge the usage of USSD signalling requires a gateway - one gateway per mobile operator/network.

The gateway's task is relaying the USSD-codes from the mobile phone to the receiving remote server.

I'm not sure If all mobile operators in the world provide such service.

To my knowledge the mobile operators in Norway use USSD inbound only; signalling to ValueAddedServices like (prepay, voicemail).

I have not heard that any USSD-gateways are available for external customers, and if it exists, I'm sure there is a cost of using.

However the M2M-marked is growing, and I think USSD is a good candidate for fast transfer of small amounts of data.

I'm trying to check this a little more and will keep you posted, but I think this is something you need to evaluate.

Br.
Håkon

2013/10/4 Mark Webb-Johnson <mark@webb-johnson.net>

I'm about to start work on the USSD protocol we had previously discussed. Just a technical evaluation at the moment, to see if this is feasible.

The www.openvehicles.com:6867 development server may go up+down quite frequently for the next month or so, as I try different things. If anyone is using that server for their car, I strongly recommend you switch to tmc.openvehicles.com:6867.

Thanks, Mark.

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