Read Raspberry Pi CPU Temperature and HTTP Post systemd timer

cpu_temp.service

# /etc/systemd/system/cpu_temp.service
[Unit]
Description=HTTP Post cpu temperature to endpoint

[Service]
Type=oneshot

# set your post url as normal environment variable
# should have the form https://ingress.opensensemap.org/boxes/<boxID>/<sensorID>
Environment="URL=https://ingress.opensensemap.org/boxes/<boxID>/<sensorID>"

# use systemctl set-environment to execute the vgencmd command and set as environment variable
ExecStartPre=/bin/bash -c 'systemctl set-environment CPUTEMP="\"$(/opt/vc/bin/vcgencmd measure_temp | cut -b 6-9)\""'
# Execute curl
ExecStart=/bin/bash -c '/usr/bin/curl --silent --fail -H "Content-type: application/json" -X POST -d "{\\"value\\":${CPUTEMP}}" "${URL}"'
# unset the CPUTEMP environment variable
ExecStop=/bin/bash -c 'systemctl unset-environment CPUTEMP'

cpu_temp.timer

# /etc/systemd/system/cpu_temp.timer
[Unit]
Description=Run cpu_temp.service every 10 minutes

[Timer]
OnCalendar=*:0/10
; ;Other way to do this:
;OnActiveSec=1 minute
;OnUnitActiveSec=1 minute
;AccuracySec=1 second


[Install]
WantedBy=multi-user.target