Just two more questions about the solution 1 and 3
Soldtion 1 is just directly soldering USB wires to the GH adaptor wires? I tried this but the raspi cannot detect the new USB device, someone says it is because the low current supply. I will try again when I receive the new power supply for raspi
Solution 3 means after removing R34 I can directly use the RX and TX pins on J8, right?