I just bought a RouterBOARD 433UL in order to try if it is suitable for our local wifi community network.
The 433UL contains only pads for RX/TX/GND/3.3V instead of a physical RS232 connector. Thus I soldered wires onto these four pads and connected them with 3.3V serial converter.
Sadly I did not notice any output during the bootup procedure of the device.
I configured the serial port with 115200 8N1 (later also with 9600 and other baudrates). I used different serial interface programs (screen, gtkterm). I also swapped RX/TX both ways to make sure that the cabling is correct.
Afterwards I went through the wiki (e.g. Serial Console) without gaining further insights.
Did anyone of you use the serial interface of the RB433UL? Maybe I missed some jumper settings or special setup procedure?
Thank you for your time!