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Question - How do I set my device serial number and retrieve it for a EMV transaction using the Augusta QC KB, or the Augusta during a standard EMV transaction? 


EMV defined tag 9F1E to be able to hold some device serial number.
It's 8 bytes long. If you look at our default terminal configuration, it's set to:

9F1E 08 5465726D696E616C (hex -> ASCII, you'll see 'Terminal')

IDTECH doesn't store the device serial number in this tag as our serial numbers are 10 characters long.

You should be able to store a serial number of your own choice in the device with this tag (and this doesn't impact the actual device serial number, which is stored separately)

The downside is that you'll have to store the value for each device (ideally with a configuration tool).