Raspberry Pi

Raspberry Pi+Yeelink.net 在线监视系统状态


Raspberry Pi

上图为在Yeelink.net生成的曲线图，数据来源于家中的Raspberry Pi一分钟一次的数据上传，分别上传了CPU，内存，剩余空间的数据。

上传脚本如下：

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#! /bin/sh
# File path: ~/Yeelink/rpi_sensors.sh
apikey=<your api key>
url_cpu=http://api.yeelink.net/v1.0/device/<device no.>/sensor/<sensor no.>/datapoints
url_mem=http://api.yeelink.net/v1.0/device/<device no.>/sensor/<sensor no.>/datapoints
url_disk=http://api.yeelink.net/v1.0/device/<device no.>/sensor/<sensor no.>/datapoints
mem_used=$(free -m | grep "Mem" | egrep "[[:digit:]]+" -o | head -n 2 | tail -n 1)
cpu_load=$(iostat -c | tail -n 2 | egrep "[[:digit:].]+" -o | head -n 1)
disk_avaliable=$(df -l | grep "/dev/sda5" | egrep "[[:digit:]]+" -o | tail -n 3 | head -n 1)
disk_ava=`echo "$disk_avaliable/1024"|bc`
echo $disk_ava
curl -d "{\"value\":$mem_used}" -H "U-ApiKey: $apikey" $url_mem
curl -d "{\"value\":$cpu_load}" -H "U-ApiKey: $apikey" $url_cpu
curl -d "{\"value\":$disk_ava}" -H "U-Apikey: $apikey" $url_disk
exit 0

上面的脚本获取了CPU，内存，剩余空间的值，然后通过Yeelink提供的api地址上传上去，但是还需要通过:

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crontab -e

来定时运行，内容看起来像这样：

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# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h  dom mon dow   command
*/1 * * * * ~/Yeelink/rpi_sensors.sh

上述代码为每隔1分钟运行一次rpi_sensors.sh，这样就能不间断上传数据了，如果crontab没有修改过默认编辑器的话，建议先修改为vim。
tips：对于上传间隔Yeelink有个限制，不能小于10s。

引用

[linux]在Yeelink云端架设笔记本运行监视器