We have an outdoor display sign at our business, and I would like to somehow communicate with the sign (to change messages on it) wirelessly. It currently has 1 Cat5 jack to connect to it, but also has a power outlet which I could draw power from. For now if we want to change a message on the sign, we either need to walk outside and connect to it with a laptop via cat5 cable (not ideal in the rain, or in winter) or we need to run a really long cable out to it which can't be left out permanently due to needing to mow the lawn etc.
So I started to do some searching online, but haven't been able to come up with something that would work well. The space I am dealing with is pretty small, and I couldn't just purchase any old kind of router and setup a bridge. It would have to be pretty small, maybe the size of a pack of cigarettes or smaller. It would be protected from the elements somewhat (mainly just from above) but would be exposed to heat and cold.
I was wondering if anyone might have a suggestion on such a device? Or some other idea of how I can possibly make this connection wireless and do away with having to run a cable out there all the time.