I get gibberish when connecting to serial on Bpi r3

Hi everyone, I’m trying to setup my Banana PI R3 and I can’t get USB serial to work properly. I followed this guide (How to Setup Banana Pi R3 with OpenWRT | by Flow | Medium)

I get a bunch of gibberish when I plug the pi in and it boots up. I swapped the tx and rx on the pi so my laptop can send to the receive port. The ground is plugged into the ground on in the pi. Everything looks right to me. I used my Framework laptop and the serial console wouldn’t show up, so I switched to an Asus laptop and the serial device shows up. I choose 150000 as the speed and everything else was left as the default, I used mobaxterm and I can get to the console. Putty didn’t seem to work. Do I need drivers? Do I need to change settings? Thanks for your help everyone.

Which serial adapter do you use? I know that profilic adapters produce such problems.

Please use ftdi adapter on r3/r4 or you will experience issues

Should be set to 115200. Make sure your port is 3.3V.

Where would I plug the 3.3v cable into?

Not extra cable…the ttl voltage of your adapter connected to the bpi needs to be 3v3,there are 5v adapters out there which may damage your bpi board

Next time, please write what hardware you use :rightwards_hand: :leftwards_hand:

This “serial connection” topics came up very often! You can search for it:

grafik

Thank you for creating a new topic :+1: and not writing in a existing …

I bought a kit off of Amazon from youyeetoo. The TTL adapter looks like the one in this guide. I plugged the 3.3v cable into the 3.3v GPIO pin. Is that right? Or will I damage my board? I installed the SD card image and realized I have a snapshot, so I can’t get luci. I will look up a version that isn’t a snapshot. I made 2 SD cards, one with the image in the guide I mentioned above, and the other one is an image from openwrt, but I’m getting 50-200mbps download on the 5ghz ax Wi-Fi after setting the region, so I want to try the official banana pi image. I’m sure that one will have better network performance.

Do not connect 3v3 from adapter,only rx,tx and gnd to the 3pin socket (rx/tx swapped). Ieant only that your ttl level (tx) needs to be 3v3,not 5v+

Oh, I removed the 3.3v cable, but then I get the gibberish. Here’s my TTL adapter.