I’m unable to read any data from the debug port of the BPI-w3, which is a major issue because I’m not able to get any help only without a debug log, I tried multiple uart to usb converter like the FT232R and the CH340, but I wasn’t able to get any meaningful data out of them. My setup where 1.5 MBaud, 8 bits data, 1 stop bit, no parity check and no flow control. Is there some things specific to this card that could prevent me from having data?
RX -TX and TX - RX and GND -GND ?
Did you set the uart’s to 3.3V instead of 5V, for the uart’s that have such switch/jumper,?
I did not at first, because I thought it was 5V, but I did after and it still didn’t work. The max I was able to get was this line 2025-10-22 17:35:02,075750 +7,677629 and then it stopped
Check/replace the Dupont cable, the fit should be tight, but it is easy to bend the internal of the connector, so that the fit is a bit loose and has bad contact. Also, 5V may damage your UART pins.
I have had the same symptoms with Rockchip boards, because of the high baudrate it is very sensitive. Replacing the Dupont cable fixed it.