The outside sensor and inside display will work for you as you can mount the sensor on top of your RV but the model with the internet bridge must be plugged directly into a router. There is a model that uses PC Connect that may do what you are looking for. AcuRite will probably have more information
Jimmy is correct. The AcuRite internet bridge does require an internet router to stream online. If you have a Windows based computer with 7, 8, or 8.1 you can use the AcuRite Connect software to stream your data online. The display does have to be connected to the PC at all times in order to stream online. If you have any further questions, please contact AcuRite customer support at 877-221-1252.