small favour request. I've had at look at your implementation of u8glib for the esp. Seems like you've stripped out a bunch of stuff and optimised it a lot for the esp.
Is there any hope that you might be able to give some arduinoIDE guys some help to get it working. I managed to get the ws2812 code that markus gave you, which basically worked straight away. I've only been using c for a few months so this is way beyond me.
currently we get the out of iram when we compile u8glib, specifically in the rotation.c file.... adding ICACHE_FLASH_ATTR to the functions doesn't help it!
Regards
A