Context

We are given the capture made with Salae Logic 2 (dystalosaurus.sal)
We install Salae Logic 2 and open the capture:

By zooming it gives something like this.

It seems to be only one signal, no clock.
By searching on the internet, Salae Logic 2 has analyzers to read the signal. Since there is no clock, I create an Async Serial analyzer like this:

It looks like the analyzer found text:

I export to TXT/CSV

Here is the result:

With a python script, we reconstruct the text:

We filter to get the flag 🙂:
