Do you know why your Raspberry Pi was going down? I used to use RPIs for things but I noticed booting them off sd cards was unreliable so I switched them to external usb SSDs. Eventually I moved to the 1L PCs (hp, dell, lenovo) used all over.
I could never pinpoint the issue. I would even hook up a monitor to my pi to see if could troubleshoot but the only thing that would get my node back is a power cycle. SSH wouldn’t work nor would accessing it via the LAN.
I should have tried re-flashing the SD card but I just got tired of it going offline. Maybe I should use the same pi start completely fresh and see if I have better luck but a part of me thinks if I am going to be serious about routing then I should get better hardware in general
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I had the exact same issues when I was running the OS off an SD card. I'd give it another go with booting off a USB -> Sata adapter with an SSD attached.
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I am assuming you can do this with umbrel?
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I know you can setup the RPI 4 to run 100% off of USB. Once that was setup you could install linux and install Umbrel on top of that.
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