return {
   on = { timer = { 'every 3 minutes' }
       }, 
    logging =   
    {
        level = domoticz.LOG_ERROR, 
        marker = 'średnia temp pokojowa',
    },    

   execute = function(dz, item)
       
       local Temp1 = dz.devices('Temp Salon').temperature
       local Temp2 = dz.devices('Temp Biuro').temperature
       local decimals = 2
       local Tempavg = dz.utils.round((Temp1 + Temp2 ) / 2 , decimals)
       dz.devices('Temp średnia').updateTemperature(Tempavg)
       dz.log('Średnia wyliczona temperatura: ' .. Tempavg, dz.LOG_INFO) 
   end
}