522 lines
15 KiB
HTML
522 lines
15 KiB
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<title>Making a Raspberry Pi inventory (HPR Show 2496)</title>
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<header>
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<h1 class="title">Making a Raspberry Pi inventory (HPR Show 2496)</h1>
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<h2 class="author">Dave Morriss</h2>
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<hr/>
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<main id="maincontent">
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<article>
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<header>
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<h1>Table of Contents</h1>
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<nav id="TOC">
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<ul>
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<li><a href="#introduction">Introduction</a></li>
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<li><a href="#script">Script</a></li>
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<li><a href="#example-output">Example output</a></li>
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<li><a href="#links">Links</a></li>
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</header>
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<h2 id="introduction">Introduction</h2>
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<p>I have a number of Raspberry Pis – possibly too many – and I sometimes lose track of which is which, what model, size, name, address each one is. I wanted to be able to keep an inventory of them all, and to this end I wrote myself a little script that can be run on any Pi which will report useful information about it.</p>
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<p>Every Pi has a unique serial number. Actually it’s randomly generated so there may be a few collisions but it’s close to unique! It also contains a revision number which encodes various items of information about it such as release date, model, PCB revision and memory. My script decodes this revision number for you based on a published table.</p>
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<p>I run a Wikimedia instance on a Pi and have used this script to record details of my Pis there as well as what they are being used for and any planned projects. I now feel more organised!</p>
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<h2 id="script">Script</h2>
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<p>The script is called <em>what_pi</em> and uses Bash. The master copy is available on my <a href="https://gitlab.com/davmo/what_pi" title="Script 'what_pi' on GitLab">GitLab repository</a> or can be downloaded from HPR (or archive.org if you are reading these notes there). It is a work in progress and contains various notes pointing out possible shortcomings.</p>
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<p>The script is listed below, but I will be brief in my description of its features in this episode.</p>
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</pre></td><td class="sourceCode"><pre><code class="sourceCode">#!/bin/bash -
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#===============================================================================
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#
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# FILE: what_pi
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#
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# USAGE: ./what_pi
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#
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# DESCRIPTION: To be run on a RPi. Reports back what model it is. Uses info
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# from /proc/cpuinfo and a lookup table from
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# http://elinux.org/RPi_HardwareHistory
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#
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# OPTIONS: ---
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# REQUIREMENTS: ---
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# BUGS: ---
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# NOTES: ---
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# AUTHOR: Dave Morriss (djm), Dave.Morriss@gmail.com
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# VERSION: 0.0.2
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# CREATED: 2016-06-17 18:17:47
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# REVISION: 2017-04-10 14:45:32
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#
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#===============================================================================
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set -o nounset # Treat unset variables as an error
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SCRIPT=${0##*/}
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#=== FUNCTION ================================================================
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# NAME: network_info
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# DESCRIPTION: Reports some basic network information in a (hopefully)
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# generalised way.
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# TODO: Make it deal with multiple interfaces properly
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# PARAMETERS: None
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# RETURNS: Nothing
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#===============================================================================
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network_info () {
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local d dev mac
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echo "Network information:"
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printf " %-11s: %s\n" "Hostname" "$(hostname -f)"
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printf " %-11s: %s\n" "IP" "$(hostname -I)"
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for d in /sys/class/net/*/address; do
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dev="${d%/*}"
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dev="${dev##*/}"
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if [[ $dev != 'lo' ]]; then
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mac="$(cat "$d")"
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printf " %-11s: %s (%s)\n" "MAC" "$mac" "$dev"
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fi
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done
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}
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#=== FUNCTION ================================================================
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# NAME: settings_info
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# DESCRIPTION: Reports stuff about settings and config file elements
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# PARAMETERS: None
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# RETURNS: Nothing
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#===============================================================================
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settings_info () {
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local codec
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#
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# Is the user in the 'video' group?
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#
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if id -Gn | grep -q 'video'; then
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echo "Various configuration and other settings:"
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echo "CPU $(vcgencmd measure_temp)"
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for codec in H264 MPG2 WVC1 MPG4 MJPG WMV9; do
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echo -e "$codec:\t$(vcgencmd codec_enabled $codec)"
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done
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vcgencmd get_config sdtv_mode
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vcgencmd get_config sdtv_aspect
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else
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echo "Can't run 'vgencmd'; you're not in the 'video' group"
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fi
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}
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#=== FUNCTION ================================================================
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# NAME: cleanup_temp
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# DESCRIPTION: Cleanup temporary files in case of a keyboard interrupt
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# (SIGINT) or a termination signal (SIGTERM) and at script
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# exit
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# PARAMETERS: * - names of temporary files to delete
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# RETURNS: Nothing
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#===============================================================================
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function cleanup_temp {
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for tmp in "$@"; do
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[ -e "$tmp" ] && rm --force "$tmp"
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done
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exit 0
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}
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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# Are we on a Pi at all?
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# TODO: Check this. It works on all my machines, but may not work everywhere
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#
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model=$(grep -m 1 '^model name' /proc/cpuinfo | cut -f2 -d:)
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re="ARMv[0-9]"
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if [[ ! $model =~ $re ]]; then
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echo "This doesn't seem to be a Raspberry Pi"
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exit 1
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fi
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#
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# Make temporary files and set traps to delete them
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#
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TMP1=$(mktemp) || { echo "$SCRIPT: creation of temporary file failed!"; exit 1; }
|
|||
|
|
TMP2=$(mktemp) || { echo "$SCRIPT: creation of temporary file failed!"; exit 1; }
|
|||
|
|
trap 'cleanup_temp $TMP1 $TMP2' SIGHUP SIGINT SIGPIPE SIGTERM EXIT
|
|||
|
|
|
|||
|
|
#
|
|||
|
|
# Create a table of Pi stuff. Copied from http://elinux.org/RPi_HardwareHistory
|
|||
|
|
# using simple cut and paste. The result is a table separated by tabs, and
|
|||
|
|
# this script relies on this fact.
|
|||
|
|
# You will have to refresh this every time a new Pi model is released. This
|
|||
|
|
# version is dated Q1 2017 and includes the Pi Zero W
|
|||
|
|
#
|
|||
|
|
cat > "$TMP1" <<'ENDTABLE'
|
|||
|
|
Revision Release Date Model PCB Revision Memory Notes
|
|||
|
|
Beta Q1 2012 B (Beta) ? 256 MB Beta Board
|
|||
|
|
0002 Q1 2012 B 1.0 256 MB
|
|||
|
|
0003 Q3 2012 B (ECN0001) 1.0 256 MB Fuses mod and D14 removed
|
|||
|
|
0004 Q3 2012 B 2.0 256 MB (Mfg by Sony)
|
|||
|
|
0005 Q4 2012 B 2.0 256 MB (Mfg by Qisda)
|
|||
|
|
0006 Q4 2012 B 2.0 256 MB (Mfg by Egoman)
|
|||
|
|
0007 Q1 2013 A 2.0 256 MB (Mfg by Egoman)
|
|||
|
|
0008 Q1 2013 A 2.0 256 MB (Mfg by Sony)
|
|||
|
|
0009 Q1 2013 A 2.0 256 MB (Mfg by Qisda)
|
|||
|
|
000d Q4 2012 B 2.0 512 MB (Mfg by Egoman)
|
|||
|
|
000e Q4 2012 B 2.0 512 MB (Mfg by Sony)
|
|||
|
|
000f Q4 2012 B 2.0 512 MB (Mfg by Qisda)
|
|||
|
|
0010 Q3 2014 B+ 1.0 512 MB (Mfg by Sony)
|
|||
|
|
0011 Q2 2014 Compute Module 1 1.0 512 MB (Mfg by Sony)
|
|||
|
|
0012 Q4 2014 A+ 1.1 256 MB (Mfg by Sony)
|
|||
|
|
0013 Q1 2015 B+ 1.2 512 MB ?
|
|||
|
|
0014 Q2 2014 Compute Module 1 1.0 512 MB (Mfg by Embest)
|
|||
|
|
0015 ? A+ 1.1 256 MB / 512 MB (Mfg by Embest)
|
|||
|
|
a01040 Unknown 2 Model B 1.0 1 GB (Mfg by Sony)
|
|||
|
|
a01041 Q1 2015 2 Model B 1.1 1 GB (Mfg by Sony)
|
|||
|
|
a21041 Q1 2015 2 Model B 1.1 1 GB (Mfg by Embest)
|
|||
|
|
a22042 Q3 2016 2 Model B (with BCM2837) 1.2 1 GB (Mfg by Embest)
|
|||
|
|
900021 Q3 2016 A+ 1.1 512 MB (Mfg by Sony)
|
|||
|
|
900092 Q4 2015 Zero 1.2 512 MB (Mfg by Sony)
|
|||
|
|
900093 Q2 2016 Zero 1.3 512 MB (Mfg by Sony)
|
|||
|
|
920093 Q4 2016? Zero 1.3 512 MB (Mfg by Embest)
|
|||
|
|
9000C1 Q1 2017 Zero W 1.1 512 MB (Mfg by Sony)
|
|||
|
|
a02082 Q1 2016 3 Model B 1.2 1 GB (Mfg by Sony)
|
|||
|
|
a020a0 Q1 2017 Compute Module 3 (and CM3 Lite) 1.0 1 GB (Mfg by Sony)
|
|||
|
|
a22082 Q1 2016 3 Model B 1.2 1 GB (Mfg by Embest)
|
|||
|
|
a32082 Q4 2016 3 Model B 1.2 1 GB (Mfg by Sony Japan)
|
|||
|
|
ENDTABLE
|
|||
|
|
|
|||
|
|
#
|
|||
|
|
# Grab two values from the /proc/cpuinfo file
|
|||
|
|
#
|
|||
|
|
REV="$(grep '^Revision' /proc/cpuinfo | awk '{print $3}' | sed 's/^1000//')"
|
|||
|
|
SER="$(grep '^Serial' /proc/cpuinfo | awk '{print $3}')"
|
|||
|
|
|
|||
|
|
#
|
|||
|
|
# Make an Awk script which finds the details in the above table and displays
|
|||
|
|
# them
|
|||
|
|
#
|
|||
|
|
cat > "$TMP2" <<'ENDPROG'
|
|||
|
|
tolower($0) ~ rev {
|
|||
|
|
printf "%-13s: %s\n%-13s: %s\n%-13s: %s\n%-13s: %s\n%-13s: %s\n%-13s: %s\n%-13s: %s\n",
|
|||
|
|
"Revision",$1,
|
|||
|
|
"Release date",$2,
|
|||
|
|
"Model",$3,
|
|||
|
|
"PCB Revision",$4,
|
|||
|
|
"Memory",$5,
|
|||
|
|
"Notes",$6,
|
|||
|
|
"Serial no",serial
|
|||
|
|
}
|
|||
|
|
ENDPROG
|
|||
|
|
|
|||
|
|
#
|
|||
|
|
# Run Awk on the table with the above script, passing the revision number as
|
|||
|
|
# a regular expression for searching, and the serial number as a simple
|
|||
|
|
# string.
|
|||
|
|
#
|
|||
|
|
awk -v "rev=^$REV" -v "serial=$SER" -F" *\t *" -f "$TMP2" "$TMP1"
|
|||
|
|
|
|||
|
|
#
|
|||
|
|
# Report various settings and parameters
|
|||
|
|
#
|
|||
|
|
echo
|
|||
|
|
settings_info
|
|||
|
|
|
|||
|
|
#
|
|||
|
|
# Report network information
|
|||
|
|
#
|
|||
|
|
echo
|
|||
|
|
network_info
|
|||
|
|
|
|||
|
|
exit
|
|||
|
|
|
|||
|
|
# vim: syntax=sh:ts=8:sw=4:ai:et:tw=78:fo=tcrqn21</code></pre></td></tr></table></div>
|
|||
|
|
<p>The process of identifying important features like the revision, release date and model of the Pi is achieved by searching a table of data. The table originates from the website <a href="http://elinux.org/RPi_HardwareHistory" class="uri">http://elinux.org/RPi_HardwareHistory</a> and has just been copied and pasted into this script. Whenever new Pis are released and the website is updated it will be necessary to refresh this table.</p>
|
|||
|
|
<p>If you do this make sure that the tab characters used in this table are preserved since they are used as the field delimiter.</p>
|
|||
|
|
<p>The searching of the table and display of results is performed using Awk, with a program that is stored in a temporary file and run on lines 163-181.</p>
|
|||
|
|
<p>The script tries to check that it is running on a Pi in the code on lines 97-102. This works for me, but may not be universal.</p>
|
|||
|
|
<p>Lines 107-109 contain commands that create temporary files and set up a mechanism to delete them using the <code>trap</code> command. The function <code>cleanup_temp</code> is used to delete the files, and that is defined on lines 76-89. I plan to talk about <code>trap</code> a forthcoming episode on the way Bash works.</p>
|
|||
|
|
<p>Any improvements to this script are welcome. Please submit a pull request to the GitLab repository.</p>
|
|||
|
|
<h2 id="example-output">Example output</h2>
|
|||
|
|
<p>This file (<code>example_output.txt</code>) can be downloaded if desired. See the Links section below.</p>
|
|||
|
|
<pre><code>$ what_pi
|
|||
|
|
Revision : 0010
|
|||
|
|
Release date : Q3 2014
|
|||
|
|
Model : B+
|
|||
|
|
PCB Revision : 1.0
|
|||
|
|
Memory : 512 MB
|
|||
|
|
Notes : (Mfg by Sony)
|
|||
|
|
Serial no : 00000000deadbeef
|
|||
|
|
|
|||
|
|
Various configuration and other settings:
|
|||
|
|
CPU temp=39.0'C
|
|||
|
|
H264: H264=enabled
|
|||
|
|
MPG2: MPG2=disabled
|
|||
|
|
WVC1: WVC1=disabled
|
|||
|
|
MPG4: MPG4=enabled
|
|||
|
|
MJPG: MJPG=enabled
|
|||
|
|
WMV9: WMV9=disabled
|
|||
|
|
sdtv_mode=0
|
|||
|
|
sdtv_aspect=0
|
|||
|
|
|
|||
|
|
Network information:
|
|||
|
|
Hostname : rpi2
|
|||
|
|
IP : 192.168.0.65
|
|||
|
|
MAC : b8:27:eb:22:de:ad (eth0)
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="links">Links</h2>
|
|||
|
|
<ul>
|
|||
|
|
<li>GitLab repository: <a href="https://gitlab.com/davmo/what_pi" class="uri">https://gitlab.com/davmo/what_pi</a></li>
|
|||
|
|
<li>Resources to download:
|
|||
|
|
<ul>
|
|||
|
|
<li>The script <em><a href="hpr2496_what_pi">what_pi</a></em></li>
|
|||
|
|
<li>Example output <em><a href="hpr2496_example_output.txt">example_output.txt</a></em></li>
|
|||
|
|
</ul></li>
|
|||
|
|
</ul>
|
|||
|
|
</article>
|
|||
|
|
</main>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|