This is an old revision of the document!
|Raspberry Pi 3 Model B/B+||$30 (either model B or B+ should work fine)|
|8GB or larger MicroSD memory card||$5 eBay|
|USB Power Adapter||$5 eBay|
|USB to serial RS-232 interface adapter||$5 eBay|
|Serial RS-232 null modem cable FEMALE/FEMALE||$5 eBay|
|Total project cost||$50|
You can also choose to use a Raspberry Pi Zero, which will save you $10-$15 from the total price, but you'll have to include extra adapters, USB hubs, etc). For the sake of simplicity in this tutorial, we'll be going with the fully features Raspberry Pi 3 Model B.
On to the next part!