My company purchased 55 Nova devices to deploy as part of a GPS tracking solution my company sells to school districts for school bus tracking.
The Nova has proven to work pretty well, but we have encountered a few problem areas:
the included antenna is not bad, but not great either. Many of our customers are rural and the LTE signals can be pretty weak. A more efficient antenna sometimes does the trick.
the Ublox module (SARA R410M-02B) itself includes some (imho) poor design decisions. The most significant is that only one communication channel is available when using the USB interface. I was using $5, 3G dongles which allowed two channels. With two channels, I can hand one over to ppp to manage data communications and use the other to query the device using AT commands to check connection status, etc. With the Ublox design, once I hand over the channel to ppp I cannot communicate with the Nova (unless I close the ppp connection).
To facilitate (1), we are adding an SMA connector to the device to accommodate more efficient antennas.
To address (2), we are adding a connector for access to the module’s UART. The UART interface allows, I believe, multiplexed access to the module so that even after a ppp connection is established, AT commands can be sent to the device.
Are there additional capabilities others in the community would like to see?