@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.

@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

-- 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)

@parkerc

@parkerc I’m going to point you here:

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

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

@parkerc then I use grafana to graph

Altui on a pi

@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 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:

When I stopped calling it a smart home and started calling it a home automation system my waf went up significantly. Go figure.

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

Thats very impressive. Well done mate.

Donno but my dehang script recorded the ecobee plugin as the last log line before hang every single time. Either getting updates or revisions found

This strategy has proved fruitful. 48 hours with no hangs.

Got sick of ecobee plugin hanging my openluup box so I built a new pi just for the ecobee plugin and a scene which pushes values onto my main openluup box.

How do you intend to mount your sensor?

Keep us posted. I’m very interested in this.

Float valves fail. Regularly. Pressure switch has no moving parts and has been significantly more reliable for me.

Two (high and low)of these(bare wire):

270 CAD

The Parrot ATO System

The Parrot ATO system Intelligent, observant, long lived, colorful and always repetitive, the Parrot will be the companion you won't know how you lived without. Along with the fun new name comes the pedigree of a proven winner. How do you make improvements to the ATO with an unrivaled reputation...

And two of these:
Ecolink Intelligent Technology Z-Wave Easy Install, Battery Operated, Door/Window Sensor, White & Brown (DWZWAVE2-ECO) https://www.amazon.com/dp/B00HPIYJWU/ref=cm_sw_r_cp_api_i_3Je6Eb7ECMY2V

And bob’s your uncle
|-<:)