[solved] Serial Console TP-Link Archer C7 v4 not working

I usually don't have any problems connecting to the UART port of my devices but my Archer C7 v4 is giving me problems.

From looking at the Wiki / ToH pages version 5 of this router doesn't have the RX connected. It seems that version 4 has something similar. I could find R27 (which is also referenced on version 5), but I still can't get serial data out of the device.

Anyone any suggestions on how to get serial console to work on Version 4?

I found it myself. It needs a resistor.

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