A simple method to notify a problem is to use email, It’s very usefully and simple to share, so I created a library to do it.
Library to use I2C PCF8575 IC with Arduino and ESP8266. This IC can control until 16 digital devices like button or LED with only two pins.
I'm going to create a Ciclop 3D scanner, but I will design a new base and PCB to do It fast and better. ;-)
Project tutorial by xreef
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