I am using multiple dash devices to connect to the cloud for a project. I am using the router to send the data to a custom end point. At the end point I want to be able to clearly identify which peice of hardware (not SIM card) is sending the data. What is the most bandwidth friendly field to use for this?
I was using the Dash.serialNumber() but this is a pretty large number to send every message. Is the device id included in the message header unique per piece of manufactured dash hardware? What generates that number?