Most definitely adguard.
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Pihole or AdGuard
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HomeAssistant
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RetroPie
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Media server or NAS (samba share)
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Music players (Logitech Media Server)
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Turn any printer or scanner into a wireless, or wired device (if it does not have ethernet)
HomeAssistant
Does it run on an RPi 1?
They state on their homepage:
Raspberry Pi 5 or Raspberry Pi 4 with power supply (neither the Raspberry Pi 3 Model A nor Model B have enough RAM to be stable).
I suppose it really depends on the amount of integrations your add to home assistant.
You could always use an older version of home assistant as well to tinker if the newest versions are not stable on the older hardware.
No need to expose your home assistant to the internet if you have a older install, if you are worried about security. Accessing through a VPN should be safe enough.
The very first Raspberry Pi 1 had 256 MB RAM, only later it was upgraded to 512 MB. One core with 900 Mhz, ARMv6. I don’t think Home Assistant will be a lot of fun on that.
Pihole is great. Then add unbound and it’s even better.
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