A wireless device control system includes a remote server connected to a wide area network and having control software for configuring, monitoring, and controlling devices at a site. The wireless device control system also includes a wireless gateway located at the site and configured to communicate with the remote server via cellular communication. Control devices are in wireless communication with the wireless gateway via a mesh network, with each of the control devices being wired to control one of the site devices. A computer device is connected to the wide area network and has an interface enabling a user to access the server control software. Control instructions entered on the remote server through the interface are communicated from the remote server to the wireless gateway and then from the wireless gateway to the control devices.