22.03.2022, 12:58
(11.03.2022, 11:51)fleeceable Wrote: You can also try to switch Tx and Rx cables on logic side.
Another way to test that your PRT3 module (and paradox program) works is to use RS232 to USB converter and connect PRT3 to computer. Then use Docklight (https://docklight.de/) program. If all settings are correct you should see some data on Docklight terminal...
I have used that Logic library on 4 sites and all works great.
Problem solved!
It was a bad wire connection inside the DB9 connector. The gnd wire was disconected.
This library is great and helped a lot. THanks.