I’m trying to understand how SMS messages reach the Dash unit.
I took my Dash “out for a drive yesterday,” covering several hundred miles between the east and west coasts of Michigan. I have a phone number for my SIM card, so I was able to send SMS messages to the unit directly from my phone. By the time, I was a hundred or so miles from my starting location, the SMS messages were no longer being received by the unit. I stopped for a few hours, upon stopping I rebooted the Dash. Normal behavior resumed – SMS’s received by the Dash no problem.
The same thing happened on the return trip: after about 100 miles or so, SMS messages no longer made it to the Dash, and leaving the unit sit stationary overnight (powered on, without being rebooted) still didn’t allow the earlier or freshly sent SMS messages to catch up with it. Rebooting this morning allowed normal behavior to return.
My [highly uninformed] hypothesis is that the Dash is using an SMS-over-data method for communication, such that when it is on the move, normal SMS traffic has a hard time keeping up with it if the Dash has not been sending outgoing messages to allow the Hologram cloud to effectively know where it is, data wise, and send an outgoing message back to the device using the same data path the device used to send outgoing data to the Hologram cloud.
It was unexpected behavior, so I didn’t have an opportunity to mess with a REST API app to see if that would work better.
So what do you think? Is this normal behavior, or something else? Any thoughts or background as to how SMS messages may work inbound to the Dash unit are welcome.