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No. 1581 CSE-M73 firmware 2.0A problem 2018-04-16

Hello,

I have the following problem with a CSE-M73 card:

Currently I use a CSE-M73 with firmware 1.5D (year 2011) connected to a device via serial RS232 and it works very well.
In April 2018 I bought a CSE-M73 with firmware 2.0A and configuring it in the same way the reading / writing of data on the serial returns error.

I tried to loop back test with the Ez-Manager application and it works correctly.

Could it be a firmware incompatibility? Is it possible to downgrade to 1.5D?

Thank you
Best regards
Luca

Writer Luca Company