It does have firmware installed, mostly Chinese but the important parts are English as you'll see when connected to Pronterface/PC/USB.
I've since replaced my board so no pics, but I did capture the board connections from the .pdf file for you, in case that helps. No seller ever shows the actual wiring for liability reasons, in case their junk burns you down.
I tried 3 times to attach the 3.3M .pdf file, but also get a 413 entity to large error.
Edited 2 time(s). Last edit at 12/31/2019 07:51PM by Diggrr.