I am a Technical Consultant of consumer electronic and electrical product on manafacturing, quality control, quality assurance, product compliance. I use English and Chinese. I had used Z80 and 6502 assembler for electro-mechanic control long time ago (the CPU tells you how much years old) and now is first time touch on Arduino, C++ etc. Hopefully, Hopefully, I can contribute some idea here for assembler and electro-mechanical control.