I run WeeWx on a RPi zero w (plus other weather-related software plus the web server) and it idles along (I've seen some peaks of about 70% CPU but mostly idle between the 5-minute bursts. Even the web access only accounts for a few percent of CPU). The RPi 4 is a nice device (I've just got on to play with) but I think it will be a waste if you are thinking of dedicating it to the WeeWx app. Do you have a NAS or some other computer that is always on? If so then you can use that for the WeeWx database and web files so that you don't 'wear out' the SD card. (Also keeping the log files there or in a memory disk image can significantly reduce the wear.) Susan
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