Hello, I am working with an inverter that only writes with a personalized command, soo I can't use system.opc.writeValues(). I'm trying to close the modbus device I have in the gateway and open the port with system.serial.openSerialPort(), and then sending the request with system.serial.writeBytes(). This is not working right now and I hope someone could help me, because clearly I'm doing something wrong. I'm working with 8.3 version.