Iphone/pad POS system help
I'm new here and have a question that I think more pertains to a hot dog cart rather than a food truck. I'm looking for a cloud POS solution using iOS for iPads/iPhones that prints receipts and later can take credit cards. Here's the kicker though. I need something that can operate with no electricity or Wifi but is able to send information to the cloud regularly through 3G networks.
I operate a mobile popup cafe based around 2 scooters but we function daily without electricity. Our lights and music system is powered by their own internal batteries. Naturally the iPad/Iphone have their own battery and the bluetooth printer is also battery powered. So I need a system that can operate without a router and routinely sends info back during the day so I don't have to worry if something happens to the device before returning to headquarters to sync.
Is there such a system on the market?
Thanks in advance!