The "Asset serial number" in Syncro (and RepairShopr) must be unique, but the serial numbers scanned by ScanCircle are not always unique, so we cannot use this field and therefore we use our own "Serial" field (not "Serial number"). The "Syncro device" probably uses another field and therefore there is no match (like you thought).
In addition, you would need to specify the "asset=" parameter, otherwise it only looks at the "Computer" asset type. But this is not much use if they use different fields for the serial number, except that it will by default avoid creating additional assets and only log the scan (can be changed using the "nomatch=" parameter).
I am not familiar with "SyncroBackup", so I cannot help you with this. But please contact me directly, so we can work out a solution.
In addition, you would need to specify the "asset=" parameter, otherwise it only looks at the "Computer" asset type. But this is not much use if they use different fields for the serial number, except that it will by default avoid creating additional assets and only log the scan (can be changed using the "nomatch=" parameter).
I am not familiar with "SyncroBackup", so I cannot help you with this. But please contact me directly, so we can work out a solution.