The proprietary %2DID command reads the 2DID of the nRF9160System in Package (SiP). The 2DID corresponds to the two-dimensional barcode etched on
top of the module.v1.3.x
Set command
The set command reads the 2DID (SERIAL_NUMBER_A) of the nRF9160SiP. If the 2DID has not been written to the device, the response is an empty string.