Cool, thanks. I will look for a desoldering tutorial and give it a try.
Just out of curiosity, what is the purpose of those resistors? And what happens electrically when I remove them?
I had some lectures about analog circuits in my studies, but I can’t remember how to read the schematics.
Imho these are different issues…on one side the i2c issue where removind the resistors fixing it and on the other side the problem with atheros cards like on r64 where tx capacitors (filter signal) were missing and or resistors wrong (voltage limit).
Because it is not the main topic, I try to make it short:
During the last years, I had problems to find out which version of the Board suppliers offer.
It was not clear for me because none of the seller wrote it in the specs description. . I had this problem for R3 and now for R4. I found no single shop offer which mentioned it (Taobao, Aliexpress, Joom)!
Of course, I tried to find out by looking at the picture. Some pictures didn’t have a good enough resolution. I couldn’t recognize the version! And additionally it became clear to me too that there is a possibility that the sellers picture are not true. They may use the first released pictures with V1.0 and sell V1.1 which is bad for their buiseness too because the “knowing people” will not buy there! I also doubted by myself because I thought maybe banana pi sold the first unofficial boards to a third party which is selling them on Alibaba. I think this situation causes a lot of email traffic and takes time away!
If you are releasing a 1.2 version of R4 these problems are getting worse .
please provide good pictures with high resolution for the sellers. The URL should be on the backside of R4 package.
extend the nomenclature: for example BPI-R4-V1.2
try to make the version number on the PCB as big as possible