Some features are (or were) available on Linux only, but Telegraf has improved there. For some metrics, you need to use WMI.
If you run libre/open-hardwaremonitor you can get even more data via WMI. Apart from the sensor data, I use that technique to get metrics from my Nvidia GPU.
BTW: I adapted the "external output plugin" for Telegraf to get it working with LibreHardwareMonitor: GitHub - kuema/open_hardware_monitor-telegraf-plugin: Open Hardware Monitor plugin for Telegraf
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