Notify about health state

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ℹ️ Info: This script can not be used on its own but requires the base installation. See main README for details.

Description

This script is run from scheduler periodically, sending notification on health related events:

high CPU utilization
low available free RAM
voltage jumps up or down more than configured threshold
voltage drops below hard lower limit
power supply failed or recovered
temperature is above or below threshold

Note that bad initial state will not trigger an event.

Monitoring CPU utilization and available free RAM works on all devices. Other than that only sensors available in hardware can be checked. See what your hardware supports:

/system/health/print;

Sample notifications

CPU utilization

Available free RAM

Voltage

Temperature

PSU state

Requirements and installation

Just install the script and create a scheduler:

$ScriptInstallUpdate check-health;
/system/scheduler/add interval=53s name=check-health on-event="/system/script/run check-health;" start-time=startup;

ℹ️ Info: Running lots of scripts simultaneously can tamper the precision of cpu utilization, escpecially on devices with limited resources. Thus an unusual interval is used here.

Configuration

The configuration goes to global-config-overlay, these are the parameters:

CheckHealthTemperature: an array specifying temperature thresholds for sensors
CheckHealthVoltageLow: value (in volt*10) giving a hard lower limit
CheckHealthVoltagePercent: percentage value to trigger voltage jumps

ℹ️ Info: Copy relevant configuration from global-config (the one without -overlay) to your local global-config-overlay and modify it to your specific needs.

Also notification settings are required for e-mail, matrix and/or telegram.

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