With NOAHlink Properties software 1.56.05 and higher, by default we only search for NOAHlink on COM ports that have Bluetooth devices registered, this means that we search much faster and with greater reliability.  As a result, by default under the Advanced Setting tab, COM Port low and COM Port high are greyed out and there is no check mark next to ‘Scan all ports’.

If your system is unable to locate the Noahlink, then put a check mark in Scan all ports and it will scan through COM ports 1 -99.