I found the solution. Turns out it was because the ftdi chip and mcu did not share groud. I did not expect it to be a problem since it worked fine with the doit dev board.

Hello, I wondered if someone has had the same issue as me and if anyone has a solution. I have made a simple board with the Wroom 32D. When I hook it up with serial com at 115200 baud. Most of the text is transferred correctly. However, some random characters are wrong. I have an example of the outp...