XIAO SAMD and Waveshare 2.13 epaper

I’m trying to use a XIAO SAMD with a waveshare 2.13 epaper, but nothing ist o see on the display.

for the first test I’m using epd2in13_V4

Wiring seems to be OK (if there is no mistake in the table below).

There is no Output to Serial monitor.

I added a LED to see what happens. ON if sketch starts and OFF at the end. That ist working.

And I use the Builtin_LED to see what happens between ON and OFF. It’s blinking.

I guess the sketch is running.

e-Paper - Seeed XIAO

VCC - 5V
DIN - D10
CLK - D8
CS - D3
DC - D2
RST - D1