I bought a kit that comes with a Raspberry Pi and a micro SD card. This can be a problem for some, and depending on your skills and the type of project you want, you might consider buying your own Pi and micro SD. The full kit comes with a Raspberry Pi 4B (2GB RAM) and an 8GB Micro SD card, and the full Raspberry Pi OS complained when I tried to install it. The Lite version (no GUI or additional apps) installs easily, but you need to be familiar with Linux to set up the Wi-Fi network and reset the password on the Pi. I work in IT as a Linux admin so this wasn't a problem for me and the sample code works.
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