Display not updated

[mart-e]

Hello,

I have a tricolor weactstudio 2.13 connected with an ESP32 and I am failing to make it work. I don’t have any error but the display is not updated.
I have taken the code example from this repository, with small adaptations for my display and mcu.

Display: 2.13-Black-White-Red
MCU: ESP-WROOM-32

Source code

$ cargo run --release
…
I (157) esp_image: segment 5: paddr=00020020 vaddr=400d0020 size=07a18h ( 31256) map
I (169) boot: Loaded app from partition at offset 0x10000
I (169) boot: Disabling RNG early entropy source...
INFO - Hello embedded world!
INFO - Intializing SPI Bus...
INFO - Initializing SPI Device...
INFO - Initializing EPD...
INFO - Acquiring display
INFO - Drawing
INFO - Sleeping for 5s...
INFO - Wake up! Hello World 0!
INFO - Sleeping for 10s...
INFO - Wake up! Hello World 1!
INFO - Sleeping for 10s...

Any idea what I am missing or how to debug it?

Thank you

Note that I am excluding an hardware issue as I have tested the C++ project epaper-webserver which uses exactly the same hardware as me and it worked.