influxdb

[sx3]

Hello,

I'm trying out this influx integration. I get the following error in the error-log.
It managed to write about 20 adresses to influx, before failing.
It's a resident script with 0 deley.

Resident script:15: attempt to index local 'dt' (a nil value)
stack traceback:
Resident script:15: in function 'get_value'
Resident script:20: in function <Resident script:18>
Library localbus: in function ''
Library localbus: in function ''
Library localbus: in function 'step'
Resident script:66: in function 'run_loop'

And the code (a little bit copy paste here and there from this thread)

Code:

local socket = require('socket')
local http = require('socket.http')
http.TIMEOUT = 5


local dt_cache = {}
function get_value(addr, datahex)
  local dt = dt_cache[addr]

  if(not dt) then
    dt = grp.find(addr)
    dt_cache[addr] = dt
  end
 
  return knxdatatype.decode(datahex, dt.datatype), dt
end

function knx_callback(event)
  local addr = event.dst
  local value, dt = get_value(addr, event.datahex)

  send_metric('rawdata', dt.name, addr, value)
end


function send_metric(table, name, addr, value)
  if name == nil or name == '' then
    return
  end

  name = string.gsub(name, ' ', '\\ ')

  local url = 'http://192.168.1.200:8086/api/v2/write?bucket=XXX&org=XXX'
  local body

  if type(value) == 'boolean' then
    body = string.format('%s,name=%s,addr=%s state=%s', table, name, addr, value)
  else
    -- most likely number
    body = string.format('%s,name=%s,addr=%s value=%s', table, name, addr, value)
  end

  local res, code = http.request({
    url = url,
    method = 'POST',
    body = body,
    headers = {
      Authorization = 'Token XXXXX'
    }
  })

  if code ~= 204 then
    log('error sending to influx', res, code, body)
  end
end

function run_loop()
  local bus = require('localbus').new(1)
  bus:sethandler('groupwrite', knx_callback)
  local busfd = socket.fdmaskset(bus:getfd(), 'r')

 
  while(true) do
    res, fbus = socket.selectfds(10, busfd)
    if(fbus) then
      bus:step()
    end
  end
end

run_loop()