Methods and apparatus for a plurality of electronic sensor devices configured to take and report sensor readings or measurements relating to an asset with which each device is associated to a remote computer system. One of the devices at a given time has wide area network (WAN) connectivity as a designated device to communicate with the remote computer system using wide area network connectivity. The designated device and the other devices take sensor readings and measurements and the other devices to report sensor readings and measurements to the designated device using local area network (LAN) connectivity. The designated device reports sensor readings and measurements received from the other devices to the remote computer system using wide area networks connectivity. It is detected when a battery in the designated device has reached a charge level below a defined threshold. One of the other devices is assigned as the designated device.