BITMAP file to HEX string

Hi everyone
Is there a simple way to convert a BITMAP file into a string of HEX (...0x00, 0x1f, 0xf8, 0xff, 0xf8, 0x00, 0x00...) ?
Like this tool do

The real story is: I want to automate the production of HEX data for an Arduino display.
Many thanks

Can you provide a sample image and a sample binary that works for your device?

I am certain node-red-contrib-image-tools will do what you want.

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