---
page-title: "Small ODROID-XU4 (HC1) scripts ($2059139) · Snippets · Snippets · GitLab"
url: https://gitlab.com/-/snippets/2059139
date: "2023-03-13 15:14:55"
---
[](https://gitlab.com/-/snippets/2059139/raw/master/Readme.md "Open raw")[](https://gitlab.com/-/snippets/2059139/raw/master/Readme.md?inline=false "Download")

## Small ODROID-XU4 (HC1) scripts

CPU underclocking, CPU clock reset and CPU temperature display.

```
#!/usr/bin/env bash

# Reset the XU4 (HC1) CPU clocks to default.

set -euo pipefail

# Auto-restart with sudo.
if [[ $UID -ne 0 ]]; then
    sudo -p 'Restarting as root, password: ' bash $0 "$@"
    exit $?
fi

cpufreq-set -c 0 --max 1500000
cpufreq-set -c 4 --max 2000000
```

```
#!/usr/bin/env bash

# Monitor the XU4 (HC1) CPU temperature.

set -euo pipefail

# thermal_zone2 seems to be the highest most of the time.
while [ true ]; do awk '{printf "\r%3.1f°C", $1/1000}' /sys/class/thermal/thermal_zone2/temp; sleep 1; done
```

```
#!/usr/bin/env bash

# Underclock the XU4 (HC1) CPU.

set -euo pipefail

# Auto-restart with sudo.
if [[ $UID -ne 0 ]]; then
    sudo -p 'Restarting as root, password: ' bash $0 "$@"
    exit $?
fi

cpufreq-set -c 0 --max 1000000
cpufreq-set -c 4 --max 1000000
```