Device Serial Number
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Some Tibbo devices carry a unique serial number, and some devices even allow a portion of this serial number to be altered once.
To find out if your device contains a unique serial number and all the particulars regarding this number, refer to this device's platform documentation (for example, EM1000's is here).
To read the serial number of your device, use the sys.serialnum R/O property. On devices without the serial number, this will return an empty string. On devices with the serial number, this will return the entire serial number including, if any, the programmable portion thereof.
use the sys.setserialnum method to set the programmable portion of the serial number. If your device does not contain a user-programmable serial number field, this method will return 1- NG.