Please consider:
a. How comes that your device has a password? Maybe you have used it in another project where a password was filled in in the project properties in ETS. Then, you can try this password.
b. RS232 interfaces do not need to be programmed by ETS (at least not an application program, only an Individual Address), so, maybe it is not necessary.
c. Check also whether you are using the correct application for the device.
d. Possibly, there is something wrong with the product description of this device in ETS. Make sure you have downloaded from Internet the newsest product database from this manufacturer for this product and imported it in ETS. Does the problem still appear?
e. You may contact the manufacturer. Maybe problems are known? Maybe something is confirmed and the device can be exhanged by a new one?
f. There may be no reason for ETS to try to authorize. Create log-files of these ETS activities and send them to support@knx.org for analysis.
Mr. Steven De Bruyne
System Department - KNX Association
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