meanwhile it is possible to use the block "analog read pin (34)" from the blockpack "Easy I/O".
So I was able to bild the probram from user M5DOCS just with UIFLOW.
Unfortunally it just shows Numbers between 450 and 600 or so. And it dows not react to any sounds.
This is the python code of the blockly program:
from m5stack import *
from m5ui import *
from uiflow import *
from easyIO import *
label0 = M5TextBox(122, 84, "Text", lcd.FONT_DejaVu24,0xFFFFFF, rotate=0)
What did I do wrong?