SNMP - Is anyone leveraging info via the Simple Network Management Protocol ?

parkerc

Hi

In my ongoing quest to try and retrieve as much information as I can about the amount of energy I’m using , I found out that I could use SNMP to see how much power (watts) my UPS is handling .

To do this, I installed snmpd/snmp on my Vera linked Raspberry Pi, and then ran the following command.

local command = io.popen("ssh -i /etc/dropbear/dropbear_rsa_host_key pi@192.168.102.37 'snmpwalk -Os -c public -v 1 10.10.10.103' 2>&1")
local response = command:read("*a")
print(response)

Which returned a huge amount of information, which prompted me to ask the community here if there anything on Vera/OpenLuup that people have that can process this sort of information into a new devices and associated variables to then monitor/track going forward ?

iso.3.6.1.2.1.1.1.0 = STRING: "Eaton 5P 1150"
iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.705.1
iso.3.6.1.2.1.1.3.0 = Timeticks: (51435090) 5 days, 22:52:30.90
iso.3.6.1.2.1.1.4.0 = STRING: "Computer Room Manager"
iso.3.6.1.2.1.1.5.0 = STRING: "ups239"
iso.3.6.1.2.1.1.6.0 = STRING: "Computer Room"
iso.3.6.1.2.1.1.7.0 = INTEGER: 72
iso.3.6.1.2.1.1.8.0 = Timeticks: (0) 0:00:00.00
iso.3.6.1.2.1.1.9.1.2.1 = OID: iso.3.6.1.6.3.1
iso.3.6.1.2.1.1.9.1.2.2 = OID: iso.3.6.1.6.3.10.3.1.1
iso.3.6.1.2.1.1.9.1.2.3 = OID: iso.3.6.1.6.3.11.3.1.1
iso.3.6.1.2.1.1.9.1.2.4 = OID: iso.3.6.1.6.3.15.2.1.1
iso.3.6.1.2.1.1.9.1.2.5 = OID: iso.3.6.1.6.3.16.2.1.1
iso.3.6.1.2.1.1.9.1.3.1 = STRING: "The MIB Module from SNMPv2 entities"
iso.3.6.1.2.1.1.9.1.3.2 = STRING: "SNMP Management Architecture MIB"
iso.3.6.1.2.1.1.9.1.3.3 = STRING: "Message Processing and Dispatching MIB"
iso.3.6.1.2.1.1.9.1.3.4 = STRING: "USM User MIB"
iso.3.6.1.2.1.1.9.1.3.5 = STRING: "VACM MIB"
iso.3.6.1.2.1.1.9.1.4.1 = Timeticks: (0) 0:00:00.00
iso.3.6.1.2.1.1.9.1.4.2 = Timeticks: (0) 0:00:00.00
iso.3.6.1.2.1.1.9.1.4.3 = Timeticks: (0) 0:00:00.00
iso.3.6.1.2.1.1.9.1.4.4 = Timeticks: (0) 0:00:00.00
iso.3.6.1.2.1.1.9.1.4.5 = Timeticks: (0) 0:00:00.00
iso.3.6.1.2.1.2.1.0 = INTEGER: 2
iso.3.6.1.2.1.2.2.1.1.1 = INTEGER: 1
iso.3.6.1.2.1.2.2.1.1.2 = INTEGER: 2
iso.3.6.1.2.1.2.2.1.2.1 = STRING: "LOOPBACK"
iso.3.6.1.2.1.2.2.1.2.2 = STRING: "eth0"
iso.3.6.1.2.1.2.2.1.3.1 = INTEGER: 24
iso.3.6.1.2.1.2.2.1.3.2 = INTEGER: 6
iso.3.6.1.2.1.2.2.1.4.1 = INTEGER: 1500
iso.3.6.1.2.1.2.2.1.4.2 = INTEGER: 1500
etc....

parkerc

Oh, and if I just want to pull one of the items I just specify the iso number with the snmpget command. E.g

local command = io.popen("ssh -i /etc/dropbear/dropbear_rsa_host_key pi@192.168.102.37 'snmpget -v1 -c public 10.10.10.103 iso.3.6.1.2.1.1.1.0' 2>&1")
local response = command:read("*a")
print(response)

which in this case will just return the first one.

iso.3.6.1.2.1.1.1.0 = STRING: "Eaton 5P 1150"

prophead

I use a lua scene to read snmp network usage from my switches. Working great for a couple of years now.

parkerc

Hi @prophead - can you share more details on the Scene, is it with Lua/luup code ?

prophead

@parkerc Yes, I have 3 lua scenes, one for each switch for LAN monitoring and one for my Edgerouter for WAN monitoring. Each uses the same basic snmp framework with device specific tweaks and then saves results to an empty device and then I graph those device variables. I'm happy to share my code below:

prophead

@parkerc this is the Dlink 8 port SNMP switch lua:

-- SNMP 8 port BWmon
-- read stored in/out values
local lines = ""
local Din = {}
local Dout = {}
local Oin = {}
local Oout = {}
local Nin = {}
local Nout = {}
local T = {}
local i,j

--check for switch
local ping = os.execute("ping -c 1 192.168.1.11")
if ping ~= 0 then
  luup.log("Dlink 8: Switch down. Aborted.")
  do return end
end

for i = 1,8 do
-- read stored values
   local f = io.open("/tmp/8"..i.."I.txt")
   if f then
   for line in f:lines() do
     lines = line
   end -- for each line
  f:close()
  else os.execute("touch /tmp/8"..i.."I.txt")
  end

  if not lines then lines = "0" end
  Oin[i] = lines
  --print (Oin[i])
  
   local f = io.open("/tmp/8"..i.."O.txt")
   if f then
     for line in f:lines() do
       lines = line
     end -- for each line
   f:close()
   else os.execute("touch /tmp/8"..i.."O.txt")
   end

  if not lines then lines = "0" end
  Oout[i] = lines
  --print (Oout[i])

end -- for each port read

-- parse values
for j = 1,8 do

Oin[j] = string.match(Oin[j], ".*Counter32: (%d+)")
if Oin[j] == "" or Oin[j] == nil then Oin[j] = 0 end
Oout[j] = string.match(Oout[j], ".*Counter32: (%d+)")
if Oout[j] == "" or Oout[j] == nil then Oout[j] = 0 end

-- read snmp
lines = ""
os.execute("/usr/bin/snmpget -r 1 -v1 -c PASSWORD 192.168.1.11 iso.3.6.1.2.1.2.2.1.10."..j.." >/tmp/8"..j.."I.txt")
local f = io.open("/tmp/8"..j.."I.txt")
   if not f then return end  
   for line in f:lines() do
      lines = line
   end
f:close()
Nin[j] = lines
--print (Nin[j])

lines = ""
os.execute("/usr/bin/snmpget -r 1 -v1 -c PASSWORD 192.168.1.11 iso.3.6.1.2.1.2.2.1.16."..j.." >/tmp/8"..j.."O.txt")
local f = io.open("/tmp/8"..j.."O.txt")
   if not f then return end  
   for line in f:lines() do
      lines = line
   end
f:close()
Nout[j] = lines
--print (Nout[j])

--parse
Nin[j] = string.match(Nin[j], ".*Counter32: (%d+)")
if Nin[j] == "" or Nin[j] == nil then Nin[j] = 0 end
Nout[j] = string.match(Nout[j], ".*Counter32: (%d+)")
if Nout[j] == "" or Nout[j] == nil then Nout[j] = 0 end

--print (Nin[j])
--print (Nout[j])

--deltas
Din[j] = Nin[j] - Oin[j]
Dout[j] = Nout[j] - Oout[j]

local max32 = 4294967295
--local max32 = 4294966864

-- handle rotation
if Nin[j] < Oin[j] then Din[j] = max32 - Oin[j] + Nin[j] end
if Nout[j] < Oout[j] then Dout[j] = max32 - Oout[j] + Nout[j] end
if Din[j] > max32 or Din[j]<0 then Din[j] = 0 end --math.max(Oin[j],Nin[j]) end
if Dout[j] > max32 or Dout[j]<0 then Dout[j] = 0 end --math.max(Oout[j],Nout[j]) end

end -- end for each port write

-- add real time interval tracking
-- read old time
lines = ""
local ot = ""
local f = io.open("/tmp/lastDlink8run.txt")
    if not f then os.execute("touch /tmp/lastDlink8run.txt") return end
    for line in f:lines() do
        ot = line
    end
f:close()
if not ot then ot = "300" end -- default to five minutes

-- write new time
local nt = tonumber(os.time())
local t = assert(io.open("/tmp/lastDlink8run.txt", "w"), "Failed to open lastDlink8run.txt")
t:write(nt)
io.close(t)

-- delta seconds
local nds = nt - ot

-- bounds
if nds < 24 then nds = 24 end
if nds > 900 then nds = 900 end

-- debugging
local t = assert(io.open("/tmp/Dlink8nds.txt", "w"), "Failed to open Dlink8nds.txt")
t:write(nds)
io.close(t)

-- maths
for k = 1,8 do
Din[k] = ((Din[k]/nds)/1024)
if Din[k] > 1500000 then Din[k] = 0 end
Dout[k] = ((Dout[k]/nds)/1024)
if Dout[k] > 1500000 then Dout[k] = 0 end
T[k] = Din[k]+Dout[k]
end -- end for each K conversion

-- set luup device variables for device 12, LAN
luup.variable_set("urn:upnp-org:serviceId:altui1", "DoorBirdINKBps", Din[1] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "DoorBirdOUTKBps", Dout[1] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "DoorBirdKBps", T[1] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "RoomHubINKBps", Din[2] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "RoomHubOUTKBps", Dout[2] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "RoomHubKBps", T[2] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "BedroomINKBps", Din[3] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "BedroomOUTKBps", Dout[3] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "BedroomKBps", T[3] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "DownstairsINKBps", Din[4] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "DownstairsOUTKBps", Dout[4] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "DownstairsKBps", T[4] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "LivingRoomINKBps", Din[5] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "LivingRoomOUTKBps", Dout[5] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "LivingRoomKBps", T[5] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "KitchenINKBps", Din[6] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "KitchenOUTKBps", Dout[6] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "KitchenKBps", T[6] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "UpstairsINKBps", Din[7] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "UpstairsOUTKBps", Dout[7] , 12)
luup.variable_set("urn:upnp-org:serviceId:altui1", "UpstairsKBps", T[7] , 12)

parkerc

Many thanks for sharing @prophead

QQ - How did you get smtpget installed on your Vera ? (I don’t have smtpget listed in usr/bin ?)

prophead

Altui on a pi

prophead

@parkerc then I use grafana to graph

prophead

@parkerc I’m going to point you here:

jertel/vuegraf

Populate metrics from your Emporia Vue energy monitoring devices into an InfluxDB - jertel/vuegraf

For more energy centric metrics then snmp. I love the vue devices and the grafana integration with this link is stellar for really understanding your energy use.

prophead

@parkerc

parkerc

Impressive stuff, thanks for sharing @prophead ..

Earlier you mentioned ‘ Edgerouter’ , does that mean you have a Ubiquiti router ? If so would you be able to share the scene Lua for that, as I have a Unfi set up so would love to test that out..

prophead

@parkerc

-- SNMP BWmon
-- read stored in/out values
local files = ""
local f = io.open("/tmp/INO.txt")
if not f then os.execute("touch /tmp/INO.txt") end
   for line in f:lines() do
      files = line
   end
f:close()

local OINO = files

local f = io.open("/tmp/OUTO.txt")
if not f then os.execute("touch /tmp/OUTO.txt") end
   for line in f:lines() do
      files = line
   end
f:close()
if not files then files = "Counter32: (0)" end
local OOUTO = files

-- parse values
local ROINO = string.match(OINO, ".*Counter32: (%d+)")
local ROOUTO = string.match(OOUTO, ".*Counter32: (%d+)")

-- read snmp
os.execute("/usr/bin/snmpget -r 1 -v1 -c PASSWORD 172.16.0.1 iso.3.6.1.2.1.2.2.1.10.4 >/tmp/INO.txt")
local f = io.open("/tmp/INO.txt")
   if not f then return end  
   for line in f:lines() do
      files = line
   end
f:close()
local INO = files

--print (INO)

files = ""  
 os.execute("/usr/bin/snmpget -r 1 -v1 -c PASSWORD 172.16.0.1 iso.3.6.1.2.1.2.2.1.16.4 >/tmp/OUTO.txt")
 local f = io.open("/tmp/OUTO.txt")
    if not f then return end
    for line in f:lines() do
        files = line
    end
f:close()
local OUTO = files

--print (OUTO)

--parse
local RINO = 0 
RINO = string.match(INO, ".*Counter32: (%d+)")
local ROUTO = 0
ROUTO = string.match(OUTO, ".*Counter32: (%d+)")

--print (RINO)
--print (ROUTO)

--maths
local RINB = 0
RINB = RINO --* 8
local ROINB = 0
ROINB = ROINO --* 8
local ROUTB = 0
ROUTB = ROUTO --* 8
local ROOUTB = 0
ROOUTB = ROOUTO --* 8

--deltas
local INt = 0
INt = RINB - ROINB
local OUTt = 0
OUTt = ROUTB - ROOUTB

local max32 = 4294966864

--debug
--luup.log ('RINB ='..RINB..', ROINB ='..ROINB)
--luup.log ('ROUTB ='..ROUTB..', ROOUTB ='..ROOUTB)

-- handle rotation
if RINB < ROINB then INt = max32 - ROINB + RINB end
if ROUTB < ROOUTB then OUTt = max32 - ROOUTB + ROUTB end
if INt > max32 or INt<0 then INt = max(RINB,ROINB) end
if OUTt > max32 or OUTt<0 then OUTt = max(ROUTB,ROOUTB) end

--luup.log ('INt ='..INt..', OUTt ='..OUTt)

-- 60 is 1 min interval and 1024 makes kBps
local kbpsINt = ((INt/60)/1024)
local kbpsOUTt = ((OUTt/60)/1024)
local total = kbpsINt + kbpsOUTt

luup.variable_set("urn:upnp-org:serviceId:altui1", "ComcastKBps", total, 11)
luup.variable_set("urn:upnp-org:serviceId:altui1", "ComcastInKBps", kbpsINt, 11)
luup.variable_set("urn:upnp-org:serviceId:altui1", "ComcastOutKBps", kbpsOUTt, 11)

prophead

@parkerc as you can see it's virtually same because SNMP is pretty standardized. Yes, this is the ubiquity edgerouter, a great $60 piece of kit. I use it for ISP failover and firewall.

parkerc

Many thanks @prophead - I’m going to try and use this with my UniFi Switch this morning..

parkerc

Quick observation, if I try the following against my UniFi (USG) Router

local command = io.popen("ssh -y -i /etc/dropbear/dropbear_rsa_host_key pi@192.168.102.144 'snmpget -r 1 -v1 -c public 192.168.102.1 iso.3.6.1.2.1.2.2.1.10.4' 2>&1")
local response = command:read("*a")
print(response)

it times out..

Timeout: No Response from 192.168.102.1.

Yet if I try this against a UniFi Switch,

local command = io.popen("ssh -y -i /etc/dropbear/dropbear_rsa_host_key pi@192.168.102.144 'snmpget -r 1 -v1 -c public 192.168.102.7 iso.3.6.1.2.1.2.2.1.10.4' 2>&1")
local response = command:read("*a")
print(response)

it works fine.

iso.3.6.1.2.1.2.2.1.10.4 = Counter32: 29157590

Hummm..

parkerc

I tried an snmpwalk on the UniFi (USG) Router too,

'snmpwalk -Os -c public -v 1 192.168.102.1' 2>&1

and that timed out..

More digging is needed later, as all seem to have SNMP enabled..

prophead

@parkerc sounds like a permissions issue. Debug on command line before trying to script. I would also avoid use of the public access to snmp as it’s a potential security issue. I always setup private domain the proceedure differs by manufacturers. You can use snmpwalk for debugging then move to snmpget once you’re ready to drill down. Good luck.

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