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You can look up online what features are included in the various Pi models, and how they differ in power consumption, and cost. But your decision also needs to consider what you need. Here, I won't describe all the different models, but concentrate on just 2 for simplicity. The model Zero W is appealing as it has low power consumption, but has limited speed, it runs the various threads MX uses sequentially, and has limited interfaces for peripherals. The model Three B plus is appealing as it has medium power consumption, but can cope better with the multiple threads that MX starts, and has more interfaces built in, such as 4 USB 2 ports. Obviously, the model Four has more capability, but is less appealing as it also consumes more power.
* Raspberry Pi Zero W
** Pi Zero W has WiFi and one USB port which is all that is needed for headless running.
** Using a faster Pi might speed parts of the installation process, but are overkill for actual ‘production’ running.
*Raspberry Pi Three B Plus
** This faster Pi is NOT needed for running Cumulus MX, but it will cope better if you are asking MX to do lots of processing.
** Pi Three B Plus has Ethernet socket (supports wired link); a HDMI socket for audio/video to TV, or computer monitor; a standard audio socket for external microphone, or speakers; 4 USB 2 sockets for weather station, mouse, keyboard, USB stick, or other storage device; plus other connections (e.g. camera).
= Setting up your Pi =
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