RPi Voltage Status Test

The voltage requirement for all model Pi's is 5V +/- 5% (min 4.75V, max 5.25V) which is the USB standard. If your power supply peaks above 5.25V, it may damage any USB devices connected to it. Using this test, administrators are proactively alerted to fluctuations in the voltage of the Raspberry Pi device.

Target of the test : A Raspberry Pi Device

Agent deploying the test : An external agent

Outputs of the test : One set of results for the Raspberry Pi device is being monitored.

Configurable parameters for the test
Parameter Description

Test period

How often should the test be executed

Host

The IP address of the Raspberry Pi device that is being monitored.

Use Sudo

The eG agent runs native Linux commands to pull metrics from the Raspberry Pi system. By default, the eG agent does not require any special permissions to execute these commands. In some highly-secure Linux environments however, the eG agent install user may not have the permissions to execute these commands directly. To grant permission to eG agent install user for command execution, first, perform the following steps:

  • Edit the SUDOERS file on the target host and append an entry of the following format to it:

    <eG_agent_install_user> ALL=(ALL) NOPASSWD

  • For instance, if the eG agent install user is eguser, then the entry in the SUDOERS file should be:

    eguser ALL=(ALL) NOPASSWD

  • Finally, save the file.

Then, when configuring this test using the eG admin interface, set the USE SUDO parameter to Yes. This will enable the eG agent to execute the Linux commands and retrieve the metrics.

Sudo Path

This parameter is relevant only when the USE SUDO parameter is set to ‘Yes’. By default, the SUDO PATH is set to none. This implies that the sudo command is in its default location – i.e., in the /usr/bin or /usr/sbin folder of the target host. In this case, once the Use Sudo flag is set to Yes, the eG agent automatically runs the sudo command from its default location. However, if the sudo command is available in a different location in your environment, you will have to explicitly specify the full path to the sudo command in the Sudo Path text box.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Voltage

Indicates the current voltage of this device.

Volts

The value of this measure should be well within admissible range. If excessive voltage is recorded, then the device may malfunction leading to severe performance bottlenecks.