# Advice needed on Pi CPU usage

**URL:** https://discourse.nodered.org/t/advice-needed-on-pi-cpu-usage/43279
**Category:** General
**Created:** [27 March 2021 12:13 UTC](https://discourse.nodered.org/t/advice-needed-on-pi-cpu-usage/43279 "2021-03-27T12:13:16Z")
**Posts on this page:** 1
**Showing post:** 149

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### Author: ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [13 April 2021 15:18 UTC](https://discourse.nodered.org/t/advice-needed-on-pi-cpu-usage/43279/149 "2021-04-13T15:18:35Z")

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> [@eddee54455](#):
>
> ping a unit, if it doesn't come back within a user-definable time(different for the units involved as close units respond quickly on the wifi, some of the others can take up to 500ms as they are relayed through multiple AP/repeaters), raise an alert and then send via Telegram if it is too far out of spec

This will get you started: [Ping Network Devices From a List - #12 by Steve-Mcl](https://discourse.nodered.org/t/ping-network-devices-from-a-list/43563/12)

you could break it up so that 5sec after issuing ping, check the results in context & send a telegram accordingly.

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