How to control the KNX bus via SMS and send notices via SMS?

[admin]

Here's a partially implemented example, you can extend it

First you have to install Lua on your device. Standard Lua version 5.1 or higher will work.

In smsd.conf you have to add this line in general config before [GSM1]:

Code:

eventhandler = /var/spool/sms/handler.lua

Then you have to create /var/spool/sms/handler.lua file with the code below and make it executable (chmod 0755)

Code:

#!/usr/bin/lua function parseheader(line, message)   local pos, data, header   pos = line:find(':')   if not pos then     return   end   header = line:sub(1, pos - 1)   data = line:sub(pos + 2)   if header == 'From' then     message.from = data   elseif header == 'Length' then     message.body = {}   end end function parse(filename)   local file, cmd, proc, body, message   -- check that file exists   file = io.open(filename)   if not file then     print('cannot open', filename)     return   end   file:close()   -- file can contain null bytes, so normal read might fail   cmd = string.format('cat %s | tr -d \\\\0', filename)   proc = io.popen(cmd)   message = {}   for line in proc:lines() do     if message.body then       if #line >= 2 then         table.insert(message.body, line)       end     else       parseheader(line, message)     end   end   proc:close()   if message.body then     message.body = table.concat(message.body)   end   print('From', message.from)   print('Body', message.body) end status, filename = arg[ 1 ], arg[ 2 ] -- validate command line arguments if type(status) == 'string' or type(filename) == 'string' then   if status == 'RECEIVED' then     parse(filename)   else     print('Wrong status', status)   end end