Abstract: A method for establishing a communication link between an operating unit and a field device from automation engineering, wherein a frame application and a Bluetooth server are executed on the operating unit, comprises connecting the operating unit to a Bluetooth gateway via a radio link via the Bluetooth server using a Bluetooth protocol, wherein the Bluetooth gateway is connected to the field device via a communication network; establishing a tunnel between the frame application and the Bluetooth gateway; sending information about the field device from the Bluetooth gateway to the frame application via the radio link; and instantiating a device driver for the field device and a communication driver based on the information about the field device. The device driver and communication driver create commands and/or queries to the field device in a format that complies with the communication protocol.