Telegraf script init

temp-telegraf/README.md

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+# raspberrypi-temperature-telegraf
+Collect RaspberryPi CPU and GPU temperature with telegraf
+
+### How to use (No script required :fire:)
+1. Add this to you telegraf.conf
+```
+[[inputs.file]] 
+  files = ["/sys/class/thermal/thermal_zone0/temp"]
+  name_override = "cpu_temperature"
+  data_format = "value"
+  data_type = "integer"
+  
+[[inputs.exec]]
+  commands = [ "/opt/vc/bin/vcgencmd measure_temp" ]
+  name_override = "gpu_temperature"
+  data_format = "grok"
+  grok_patterns = ["%{NUMBER:value:float}"]
+
+```
+2. Add telegraf user to video group ```sudo usermod -a -G video telegraf```
+3. ```sudo service telegraf stop;sudo service telegraf start```
+4. Run test ```telegraf -config /etc/telegraf/telegraf.conf -test```
+
+### How to use (Old way)
+1. Copy ```telegraf_pi_temp.sh``` to ```/usr/local/bin/telegraf_pi_temp.sh```
+2. Modify file permissions ```chmod +x /usr/local/bin/telegraf_pi_temp.sh```
+3. Add ```telegraf``` user to video group ```sudo usermod -a -G video telegraf```
+4. ```sudo service telegraf restart``` or ```sudo reboot```
+5. Add to your telegraf.conf snippet from ```telegraf.conf```
+6. Run test ```telegraf -config /etc/telegraf/telegraf.conf -test```
+
+### Data format
+To get a human readable *cpu* temperature divide it by 1000 (in grafana use the math(/ 1000) function
+```json
+{"cpu":54768, "gpu":54.8}
+```
+<img src="http://i.imgur.com/tnenohv.png" width="700">

temp-telegraf/telegraf.conf

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+[[inputs.exec]]
+  commands = ["/usr/local/bin/telegraf_pi_temp.sh"]
+  timeout = "5s"
+  data_format = "json"
+  name_suffix = "_pi_temp"

temp-telegraf/telegraf_pi_temp.sh

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+#!/bin/bash
+prefix="temp="
+suffix="'C"
+gpu=$(/opt/vc/bin/vcgencmd measure_temp)
+gpu_temp=${gpu#$prefix}
+gpu_temp=${gpu_temp%$suffix}
+echo -e "{\"cpu\":"$(</sys/class/thermal/thermal_zone0/temp)", \"gpu\":$gpu_temp}"