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Raspberry Pi Statistics

A script to collect various Raspberry Pi statistics, which are sent via Telegraf to InfluxDB.

Collecting Raspberry Pi Statistics

The provided rpi-stats.sh script collects statistics using Raspbian's vcgencmd command. These values are parsed from the command's output and formatted in InfluxDB's line protocol for easy collection via Telegraf's exec input.

To learn how to install Telegraf (and the rest of the TICK Stack) on the Raspberry Pi, refer to this blog.

Copy the script to the directory from which you wish to run it (I usually put it in /usr/local/bin), and ensure that it can be executed by the user under which Telegraf will be run (the default user is telegraf). The user will need to have sudo rights.

Configure the Telegraf exec input to execute the script. For example...

[[inputs.exec]]
  # Commands array
  commands = [ "/usr/local/bin/rpi-stats.sh" ]
  # Timeout for each command to complete.
  timeout = "5s"
  # Data format to consume.
  data_format = "influx"

A complete Telegraf configuration file (telegraf.conf) is provided to help you get started.

After Telegraf is started, data will be sent to InfluxDB.

Import the Dashboard

A Raspberry Pi Health dashboard for Chronograf is provided in the file Raspberry_Pi_Health.json. This can be imported from Chronograf's Dashboards list.

Collected Statistics

Metric	Description
arm_freq	clock frequency of the ARM processor
arm_mem	memory size allocated to the ARM processor
core_freq	clock frequency of the SOC
config_arm_freq	configured clock frequency of the ARM processor
config_core_freq	configured clock frequency of the SOC
config_gpu_freq	configured clock frequency of the GPU
config_sdram_freq	configured clock frequency of the SDRAM
core_volts	voltage provided to the SOC
dpi_freq	clock frequency of the DPI
emmc_freq	clock frequency of the EMMC
gpu_mem	memory size allocated to the GPU
h264_freq	clock frequency of the H.264
hdmi_freq	clock frequency of the HDMI
isp_freq	clock frequency of the ISP
malloc_mem	free GPU memory in the malloc heap
malloc_total_mem	total memory assigned to the GPU malloc heap
mem_reloc_allocation_failures	relocatable memory failures
mem_reloc_compactions	relocatable memory compactions
mem_reloc_legacy_block_failures	relocatable memory legacy block failures
oom_count	count of out-of-memory events
oom_ms	total milliseconds in the out-of-memory handler
pixel_freq	clock frequency of the Pixel
pwm_freq	clock frequency of the PWM
reloc_mem	free GPU memory in the relocatable heap
reloc_total_mem	total memory assigned to the GPU relocatable heap
sdram_c_volts	voltage provided to SOC SDRAM
sdram_i_volts	voltage provided to I/O SDRAM
sdram_p_volts	voltage provided to Physical SDRAM
soc_temp	temperature of the SOC
uart_freq	clock frequency of the UART
v3d_freq	clock frequency of the V3D
vec_freq	clock frequency of the VEC

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