[NanoPi NEO2] Cronjob example to reboot Armbian machine by detecting the CPU temperature.

README.md

Auto Rebooting NanoPi NEO2 NAS Before Crash

This gist explains how to reboot the NanoPi NEO2 NAS before the CPU temperature rises too high and the device crashes.

Cron Job Setting Example

$ sudo crontab -l
# Check CPU temperature every 30 min (reboot if over 70°C)
*/30 * * * * /root/cron_jobs/onheat_reboot.sh > /root/cron_jobs/onheat_reboot.log 2>&1

References

• Data sheet of NanoPi NEO2 | PDF @ electronicsdatasheets.com
• Wiki for 1-bay NAS Dock v1.2 for NanoPi NEO/NEO2 @ friendlyelec.com

DIY NAS Server with 1-bay NAS Dock & NEO2

The 1-bay NAS Dock is an expansion board which can be used to connect an external hard disk to a NanoPi NEO2.It uses JSM568 USB3.0 to SATA IC and communicates with a NanoPi NEO2 via USB interface. It works with a 2.5" SATA hard disk.It uses TI's DC-DC chipset to convert a 12V input to 5V. It has a power switch for users to turn on/off the device.It supports an onboard RTC battery. FriendlyElecmigrated mainline Linux-4.11 kernel and Debian-Jessie with OpenMediaVault. Together with FriendlyElec's customized aluminum case you can quickly assemble a storage server. Here is a hardware setup : 1-bay NAS Dock v1.2 for NanoPi NEO/NEO2

onheat_reboot.sh

#!/bin/bash
# This cronjob script reboots the NanoPi NEO2 + Armbian computer when the CPU temperature rises above 70°C.
# This script aims to work on 1-bay NAS Kit v1.2 for NanoPi NEO2

HOME="/root"

. /root/.bashrc

set -eu

DEBIAN_FRONTEND=noninteractive

# Include functions:
# getboardtemp()
# batteryinfo()
# ambienttemp()
source /usr/lib/armbian/armbian-allwinner-battery

CPU_TEMP_LIMIT=70
CPU_TEMP_OFFSET=0

getboardtemp

echo "CPU Temp: ${board_temp}℃" "$(date)"

if [[ ($board_temp > $CPU_TEMP_LIMIT) ]]; then
	echo "CPU Temperature over ${CPU_TEMP_LIMIT}°C detected. Rebooting."
	sudo reboot
fi