This board is a first cut at using the ESP32 dev board from Adafruit to provide for an IOT connection hub. It will read 8 sensors connected through 2 4 channel optoisolator boards purchased separately. It will control 4 relays using a Sainsmart 4 channel active low relay board. The ESP32 code will connect through IFTTT or another MQTP service to talk to Amazon's Alexa unit and allow voice commands to be processed. It uses an ILI9341 compatible 240x320 TFT display for messaging and console services. I had to edit the library version of the ESP32 component. PCB had wrong net layout. The designer had misnumbered the lower numbered pins on the left side. Pin 1 is upper left not lower right.