Just posted on Github the Cayenn Laser 3A driver Lua code that can be uploaded to ESP8266 / NodeMCU via ChiliPeppr’s NodeMCU workspace. https://github.com/chilipeppr/cayenn-laseruv
I don’t have a laser, yet. 
DTR Laser shop is my favorite. https://sites.google.com/site/dtrlpf/home/diodes