diff --git a/openwrt/package/flukso/src/data.lua b/openwrt/package/flukso/src/data.lua
index 2662b29..be20c3f 100644
--- a/openwrt/package/flukso/src/data.lua
+++ b/openwrt/package/flukso/src/data.lua
@@ -20,11 +20,11 @@
 -- $Id$
 --
 
-local os, math, table =
-      os, math, table
+local os, math, table, string =
+      os, math, table, string
 
-local getfenv, setmetatable, pairs =
-      getfenv, setmetatable, pairs
+local getfenv, setmetatable, pairs, ipairs =
+      getfenv, setmetatable, pairs, ipairs
 
 module (...)
 local modenv = getfenv() -- module environment
@@ -78,19 +78,19 @@ function fill(M)
 end
 
 function json_encode(M)
-  J = {}
+  local J = {}
   for meter, T in pairs(M) do
     J[meter] = '['
     local H = timestamps(T)
-    for i = H[1], H[#H] do
-      J[meter] = J[meter] .. '[' .. T[i]  .. ']'
+    for k, timestamp in ipairs(H) do
+      J[meter] = J[meter] .. '[' .. timestamp .. ',' .. T[timestamp]  .. '],'
     end
-    J[meter] = J[meter] .. ']'
+    J[meter] = string.sub(J[meter], 1, -2) .. ']'
   end
   return J
 end
 
-local function timestamps(T)
+function timestamps(T)
   local H = {} -- helper table, an indexed array containing all the measurement's timestamps
   for timestamp in pairs(T) do H[#H+1] = timestamp end
   table.sort(H) -- sort in ascending order, oldest timestamps will be treated first
diff --git a/openwrt/package/flukso/src/flukso.lua b/openwrt/package/flukso/src/flukso.lua
index 9f8de77..989ca4b 100755
--- a/openwrt/package/flukso/src/flukso.lua
+++ b/openwrt/package/flukso/src/flukso.lua
@@ -35,7 +35,7 @@ local param = {xmlrpcaddress = 'http://logger.flukso.net/xmlrpc',
                pwraddress    = '255.255.255.255',
                pwrport       = 26488,
                pwrenable     = false,
-               pwrinterval   = 1,
+               pwrinterval   = 0,
                pwrdir        = '/tmp/sensor',
                device        = '/dev/ttyS0',
                interval      = 300}
@@ -164,7 +164,7 @@ function publish(child, dir)
     os.execute('mkdir -p ' .. dir .. ' > /dev/null')
     while true do
       local measurements_json = measurements:json_encode()
-      for meter, json in measurements_json do
+      for meter, json in pairs(measurements_json) do
         io.output(dir .. '/' .. meter)
         io.write(json)
         io.close()