unifi-poller VS UFiber.Configurator

possibly https://unpoller.com/ ?

I'm looking for something that will pull near real time switch port traffic. The 5 min avg that the gui gives you isn't granular enough. I did find https://unpoller.com/, but doesn't appear to be updated in a few years. Is there anything else, that maybe uses SNMP or something?

I have Unfi equipment and I use unpoller

Not at all. If you're looking to get accurate metrics from the Unifi, then I'd suggest using UniFi Poller with Grafana

If you've got Ubiquiti like I do you can use https://github.com/unpoller/unpoller to push your logs / stats to your stack I believe. Or alternatively the OPNsense one.

Unifi Poller -> Prometheus -> Grafana

The Dashboard consists of: Varken for aggregating data from the Plex ecosystem into InfluxDB using Grafana for a frontend. OPNsense capturing with the help of Telegraf plugin. Adguard Home monitoring utilizing a custom exporter named Adguard_Exporter for prometheus. UniFi agregating with UnPoller. For TrueNAS Scale, I installed the community catalog for installing Kube Apps, this allowed me to installed Prometheus and use the node-exporter provided on this dashboard. Proxmox metrics server provided here.

Why not just use https://github.com/unpoller/unpoller and modern observability like Prometheus and Loki for events and logs ?? It is working on my side and cannot back to things like Zabbix, Cacti or anything like this. Alerting also possible without any problems.

Unpoller to collect metrics from my network devices

I used this: https://github.com/Unifi-Tools/UFiber.Configurator

I've managed to change the Serial of the Nano G using the UFiber.Configurator, but I don't get a persistent green light. It just goes green for a few seconds and reverts back to Red. I've been trying long enough to get this working on my own, but no luck whatsoever.