With the recent increase of robust and complex technologies in the industrial field driving the fourth industrial revolution, also known as Industry 4.0, a current problem becomes alarming when comparing the resources available to companies with higher investment capabilities towards production lines against those with Legacy Systems. RFID technology, with the integration of Node-RED and OPC UA, is a low-cost solution extremely efficient and innovative when discussing systems automation, however a solution with a rigid and difficult code when applied to a Flexible Manufacturing System makes the integration of this complex system unachievable. The present paper proposes a method of programming the RFID system from a data structure using .csv archives that allows fluidity and versatility on the production process. This paper presents a case study based on a Festo FMS and Node-RED with OPC UA that is based on a current bigger research project.