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This is a quick write up on installing Net-SNMP and creating custom mibs on the Galileo. I am using the eglibc image here: http://downloadmirror.intel.com/25384/eng/iot-devkit-201510010757-mmcblkp0-galileo.direct.xz http://downloadmirror.intel.com/25384/eng/iot-devkit-201510010757-mmcblkp0-galileo.direct.xz
Why SNMP? Because much of the SCADA and IIoT infrastructure is monitored using tools like Nagios and SolarWinds etc.
wget http://downloads.sourceforge.net/project/net-snmp/net-snmp/5.7.3/net-snmp-5.7.3.tar.gz http://downloads.sourceforge.net/project/net-snmp/net-snmp/5.7.3/net-snmp-5.7.3.tar.gz
# We untar to /tmp to avoid long filename issues
tar -xvf net-snmp-5.7.3.tar.gz -C /tmp
cd /tmp
./configure --disable-ipv6 --disable-embedded-perl --without-perl-modules --disable-snmptrapd-subagent
# This takes some time, so nohup it
nohup make &
tail -f nohup.out
make install
# create the snmpd.conf
snmpconf
Select snmpd.conf
Select Access
Create readwrite and read only groups (I suggst galileo and galileo-rw)
finished
# create a custom MIB using a script called /usr/local/bin/temp.py
# this displays the temperature
1: Extending the Agent
1: run a simple command using exec()
ENTER
name: temperature
The path to the program to be run.: /usr/local/bin/temp.py
The arguments to pass to /usr/local/bin/temp.py:
finsihed
finished
quit
# Start snmp
# Move the config file to etc
mv snmpd.conf /etc/.
snmpd.conf -c /etc/snmpd.conf
Then you can test it.
# This will not show the custom mib
snmpwalk -c galileo -v2c 192.168.1.100
# Display the custom mib
snmpwalk -c galileo -v2c 192.168.1.100 nsExtendOutput1
NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."temperature" = STRING: 82.66
NET-SNMP-EXTEND-MIB::nsExtendOutputFull."temperature" = STRING: 82.66
NET-SNMP-EXTEND-MIB::nsExtendOutNumLines."temperature" = INTEGER: 1
NET-SNMP-EXTEND-MIB::nsExtendResult."temperature" = INTEGER: 0
# Get just the OID
snmptranslate -On NET-SNMP-EXTEND-MIB::nsExtendOutput1Line.\"temperature\"
# Query by just the OID
snmpwalk -c galileo -v2c 192.168.1.100 .1.3.6.1.4.1.8072.1.3.2.3.1.1.11.116.101.109.112.101.114.97.116.117.114.101
NET-SNMP-EXTEND-MIB::nsExtendOutput1Line."temperature" = STRING: 81.78
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If you want to use SNMP but don't want to spend all the time compiling, I put the code here: https://github.com/joemcmanus/netsnmp-galileo GitHub - joemcmanus/netsnmp-galileo: A tar of net-snmp compiled for the Intel Galileo Gen 2
Just untar/gz and run make install.
-Joe

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