I have tested Serval in QGIS version 3.10.14-1 using asc files.
The Serval seemed to work, but the value was not actually changed.
I was confused because there was no mention of the asc file in QGIS or the GitHub wiki.
However, I found that It works well after converting the file to tiff
So I suggest you to add the relevant guide to GitHub wiki, or add the following phrase after line 682 of the serval.py
os.path.splitext(layer.source())[1].lower()!='.asc'
Hello!
I have tested Serval in QGIS version 3.10.14-1 using asc files. The Serval seemed to work, but the value was not actually changed. I was confused because there was no mention of the asc file in QGIS or the GitHub wiki. However, I found that It works well after converting the file to tiff
So I suggest you to add the relevant guide to GitHub wiki, or add the following phrase after line 682 of the serval.py os.path.splitext(layer.source())[1].lower()!='.asc'