@Lup Yuen Lee 李立源 We send data via light often times except we seldom see it as such. Infrared remote controls send data back and forth every time they're used. I remember once having a laptop which had an infrared port, which I'd use to sync my Palm Pilot back in the way back time.

@lupyuen Nice!

Back in maybe 1998 our office printer by HP had an infrared port, and the Pentium II laptop had that too. A fast data transfer that was not, but got the work done.

I think I have all the parts to attempt this project. I think I'll make an attempt at it soon.