¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. Nodered-Hamradio
  2. Topics

Pi4 vs. Pi5

 

Thought I'd give some input on this. I just upgraded my Pi4 16GB to a Pi5 16GB. This is a dedicated Pi running only NR off of a 64GB card. I have 24 separate flows going on in my dashboard so I'd say I'm a fairly decent judge of performance. Previously I was cycling between 15-45% CPU usage on the Pi4. Now I'm between 5-15% with the same flows. Performance difference is very evident. Reboots are 5x faster. I did do a fresh install on the Pi5 of NR and just imported my flows. Took a little bit to get all my nodes back, but overall the process wasn't too bad. So if you're a fairly intensive NR user I can genuinely say that even if you're not pegging the CPU usage on the Pi4 you will notice a nice performance increase going to the Pi5
 

¿ªÔÆÌåÓý

If you want even more performance, get one of the cases that support an nVME in PCIe 3 mode. That is my production Pi.?

Development Pi is a Pi500.?

73
Dave wo2x
Sent from my waxed string and tin cans.?

On Apr 21, 2025, at 1:17?AM, Patrick Lenn via groups.io <nwmtech@...> wrote:

?
Thought I'd give some input on this. I just upgraded my Pi4 16GB to a Pi5 16GB. This is a dedicated Pi running only NR off of a 64GB card. I have 24 separate flows going on in my dashboard so I'd say I'm a fairly decent judge of performance. Previously I was cycling between 15-45% CPU usage on the Pi4. Now I'm between 5-15% with the same flows. Performance difference is very evident. Reboots are 5x faster. I did do a fresh install on the Pi5 of NR and just imported my flows. Took a little bit to get all my nodes back, but overall the process wasn't too bad. So if you're a fairly intensive NR user I can genuinely say that even if you're not pegging the CPU usage on the Pi4 you will notice a nice performance increase going to the Pi5
<Screenshot 2025-04-20 221622.png>
 

Hi All,
Interesting and good to know there are some benefits.
?
I recently started my Pi journey with a Pi5. I have since learned that the GPIO functionality is not reliable under Node RED. I had to downgrade to a Pi4 to get the GPIO working. The Raspberry Pi guys changed the recommended GPIO lib for Pi5. Node RED requires a node rewrite that will not be backward compatible. It appears we have sort of a standoff - Node RED is waiting for the lib authors to fix the lib and the authors claim it is compatible. I would say barely compatible and not stable or capable of anything requiring precision.
?
Anyone needing GPIO functionality may be better with a Pi4 and should be cautious with regard to a Pi5.
--
Bill - N1HKO
 

¿ªÔÆÌåÓý

Good to know Bill. Post if anything changes. I use external (network) relays and switches for antennas, filters, AC and DC.?

73
Dave wo2x
Sent from my waxed string and tin cans.?

On Apr 21, 2025, at 11:04?AM, Bill - N1HKO via groups.io <bill@...> wrote:

?
Hi All,
Interesting and good to know there are some benefits.
?
I recently started my Pi journey with a Pi5. I have since learned that the GPIO functionality is not reliable under Node RED. I had to downgrade to a Pi4 to get the GPIO working. The Raspberry Pi guys changed the recommended GPIO lib for Pi5. Node RED requires a node rewrite that will not be backward compatible. It appears we have sort of a standoff - Node RED is waiting for the lib authors to fix the lib and the authors claim it is compatible. I would say barely compatible and not stable or capable of anything requiring precision.
?
Anyone needing GPIO functionality may be better with a Pi4 and should be cautious with regard to a Pi5.
--
Bill - N1HKO
 

On Mon, Apr 21, 2025 at 09:04 AM, Bill - N1HKO wrote:
The Raspberry Pi guys changed the recommended GPIO lib for Pi5.
Another issues using RPI GPIO pins to operate relays, is the "reboot" stage give random relay positions.
?
For a RPI 5 solution and solving the random relay during reboot issue, consider what I do.
?
I use a simple RPI-3 and its GPIO pins to operate my relays.....all located in remote locations. ?These are on a UPS power supply and I have not rebooted them in years.
?
At my station Node-Red, in your case running on the RPI-5, use MQTT to send the GPIO position variable, on/off, 1/0, true/false, etc, to the remote pi using the GPIO pins to operate the remote relays.
?
Also, I often reboot the station Node-Red, and doing so does not cause random operation of the remote Pi-3 and its GIPO driven relays.
?
Alan. WA9WUD

1 - 5 of 5