RE: MODBUS TCP SLAVE AND RECEIVE

Code:
if not mb then
  require('luamodbus')
   
  mb = luamodbus.tcp()
  res, err = mb:open('0.0.0.0', 502)
  res, err = mb:setslave(2)
  log("Modbus slave IN : 502/2")
  
  function setintmo(grpaddr, regaddr)
    
    local value = grp.getvalue(grpaddr) or 0
    res, err = mb:setregisters(regaddr, value)
    
  end ------- setint(grpaddr, regaddr)

  function setintresgis (direc, regist)
          
       local valuer = mb:readregisters(regist)
    log (valuer)
    if valuer ~= nill then
       grp.write(direc, valuer)
      end
        
    end --- setintresgis (direc, regist) 
  
  
    function updateregisters()
    setintmo('32/1/2', 2) 
  end --- updateregisters()

    function updateinputregisters()
     setintresgis('32/1/4',10) 
    end
    
    
  mb:setmapping(100, 100, 100, 100)
  updateregisters()
  updateinputregisters()
  
end --- mb

mb:handleslave()

curr = os.time()
if curr ~= prev then
 updateregisters()
 updateinputregisters()
 log ('A')
  prev = curr

end