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Every now and then after reboot (or power-on), RS232 port wakes up in a state, where it receives data, but cannot send any. Meaning, that no activity can be observed on pin 2 (RXD).

Our RS232 port is configured as Serial type Over-IP (TCP), mode Server.

The connection is made with three wires, GND, RXD and TXD. All the other pins are left unconnected.

Rebooting the device solves the problem, as after a few reboot cycles RS232 starts working as expected, but we are keen to find a solution without a need for reboot.

We are working with the latest firmware, RUT9XX_R_00.06.06.1.

Any ideas?

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Can you send me a private message with router troubleshoot file when this issue occurs? I want to check what errors are in logs.

Also, do you have this one router or more? If more, does this issue occurs with all your device?

Thank you so much for this. I was into this issue and tired to   tinker around to check if its possible but couldnt get it done. Now that i have seen the way y https://vidmate.onl/ ou did it, thanks guys