PCB Build

Here is parts list for the PCB...

• 6x 26 Pin IDC header Connectors (Amazon Link)

Pin Headers, get an assortment of sizes, like this on Amazon Amazon here and that will cover you for what is needed below;

• 4x 10 Pin Headers for voltage level shifters

• 2x 15 Pin Headers for ESP32 (note that in assortment link above, assortment included 16 pin headers but not '15 pin'. Simply cut an end pin off to make it 15, ensuring you leave plastic surrounding the pin)

• 1x 3 Pin Header for Polulu 12v Step Up Regulator

• 2x CAT5 Connectors (or just get a bag of them like here).

• 1x Polulu 12v Step Up Regulator here (order a few more as spares)

• 2x 8 Channel 3.3 to 5v Level Shifters from Amazon or Ebay

• 2x ESP32 Dev Board like this here

• 6x 3 Screw Terminal Block

• 1x 2 Screw Terminal Block Can get packs that include both of these like on Amazon here

• 1x 28 Pin IC Connector here (this is for MCP23S17 to plug into PCB (I made mistake of soldering MCP23S17 directly to PCB instead of using this connector. So it means I cannot pull it out if needed.)

• 1x MCP23S17 GPIO Expander like this here.