wifi collector not exposing all metrics on arm64 platform

Host operating system: output of uname -a

Linux veeve-id-v1-cid-beta-kroger-040101 4.9.140-tegra #1 SMP PREEMPT Thu Jun 25 21:22:12 PDT 2020 aarch64 aarch64 aarch64 GNU/Linux

node_exporter version: output of node_exporter --version

node_exporter, version 1.0.1 (branch: HEAD, revision: 3715be6ae899f2a9b9dbfd9c39f3e09a7bd4559f)
build user: root@1f76dbbcfa55
build date: 20200616-12:46:57
go version: go1.14.4

node_exporter command line flags

node_exporter --collector.wifi --web.listen-address=":9101"

Are you running node_exporter in Docker?

No

What did you do that produced an error?

Just ran the command shared above on arm64 device (xavier-AGX actually)

What did you expect to see?

All the 11 metrics exposed by amd64 node exporter

What did you see instead?

Only the following two metrics

node_wifi_interface_frequency_hertz
node_wifi_station_info

Description

It seems that node exporter has a bug for arm64 devices where it can't expose all the wifi collector metrics. I am mainly looking for signal quality metric which is exposed by iwconfig in both arm64 and amd64.

Start with the node_exporter --collector.wifi entry point and reproduce the metric output on the reported arm64 system. Compare it with the 11 metrics expected from amd64 and the signal quality reported by iwconfig; done means the wifi collector exposes the missing metrics, including signal quality, on arm64.