ECUHELP KTfalsh ECU Tool, working together with sm2 pro 2.21.22, are confirmed to read and write Continental Sid321 on Bench.
In detail:
ECU: Sid321
reading 30-40mins
Write 5 mins
Using the ktflash dongle + sm2 pro 2.21.22 J2534 interface
Please look at the outlook of ECU Sid321:

And the working interface of using the KTflash to read and write the ECU Sid321:
