I’ve started to look at replacing a RPi3 and the N2+ has caught my eye - especially as it will most likely be widely supported given the release of the Blue.
Given its popularity only the 2Gb version is available at the moment. Would there by any circumstances where HA would stress with only 2GB vs 4GB or is this not a bottleneck for this kind of application?
Also I am assuming 64GB would be more than enough for most installs?
I am running what could be considered a “mid-level” installation. Not a lot of devices but running across a range of protocols - zigbee, z-wave and wifi. A few lights, plugs and sensors and some rules and looking to add a few more devices.
HA itself uses very little RAM. As an example I run what I would think is a pretty average instance and use less than 750 MB of RAM. You can see my setup at the link below.
My dev instance which has only a handful of sensors and a few basic addons (ssh, samba, vs code) uses ~400mb.
If I actually use the VS code addon or when I ran the unifi controller as an addon it uses a lot more RAM. I think I still only gave my HA VM 2GB and didn’t have an issue.
Long story short is it depends what you plan to run how much RAM you’ll need. 2GB should be fine for most applications.
Same goes for storage. HA itself requires very little space. If you want to keep a ton of history or use addons that need a lot of storage you may need more.
Hy @silvrr, if you don’t mind me asking I was thinking of buying a Raspberry Pi 4 and I found one with 1 Gb of RAM at a reasonable price, every extra Gb cost around 15 €, do you think it is worth it?
Heavily dependent on what you are going to run on the Pi. Which OS are you going to run? What add-ons are you planning on running? Will anything else be running on the Pi (if not running HAOS)?
I believe the optimum platform for HA is the odroid 2n+ with 4G ram and a 32G emmc storage chip. From a performance perspective it blows a Pi 4 away. Most people think the Pi 4 is good enough for performance, but you can save a lot of time when your’re setting things up using the extra performance you get out of the 2n+. Things that take 20 minutes on the pi are done in a minute or 2 on the N2+. Most people only need the 2G ram version, however I prefer the 4G version because it’s very helpful when an updated integration has memory issues. In the years I’ve used HA I’ve been hit with memory issue a twice. The extra 2G of ram at least allowed the system to stay operational for a couple of days before it crashed and restarted. From a power perspective the ARM boards blow the X86 systems away. You also get the advantage of the GPIO pins with ARM boards, which can be very useful for integrating things such as contact wired sensors and other hardware.