Reverse engineering the M2 Nano.

[tatarize]

If you want to update this stuff with later information.
https://github.com/meerk40t/meerk40t/wiki/Tech:-Lhymicro-Control-Protocols

And the video How the M2 Nano Works.
https://www.youtube.com/watch?v=hesc0a7qXGA

Hacking.txt is wrong in a couple ways.

• The expansion port is wired. It goes high while the laser is running and 8 seconds afterwards.
• The chip is a pretty specific SinoWealth chip, it's a programmable 8051 processor.
• The controller does not have much intelligence. It stops moving the axis when the endstop is hit.
• The PC sends relative locations, the board will absolutely slam into any wall you tell it to.
• The whole thing is able to be controlled with just the little outputs there and they are dumb.
• The datasheet covers the 1.9 EPP mode the chip uses. http://www.wch-ic.com/products/CH341.html