Abstract: A method for transmitting and receiving data packets between a master device and at least one slave device using a synchronized data communication protocol. In the method, a time period to be used between consecutive packets to be transmitted to the master device is defined, on the basis of the calculated number of data packets received by the master device in a predetermined time period. In the wireless data communication system, a master device, and a slave device, including wireless data communication part transmit and receive data packets between the devices using a synchronized data communication protocol. In the protocol, the time period to be used between consecutive packets to be transmitted is defined on the basis of the calculated number of data packets received by the master device in a predetermined time period.

Abstract: The invention relates to a method for transmitting and receiving data packets between a master device (31) and at least one slave device (32, 33, 34, 35) using a synchronized data communication protocol. In the method, a time period to be used between consecutive packets to be transmitted to the master device (31) is defined, on the basis of the calculated number of data packets received by the master device (31) in a predetermined time period. The invention further relates to a wireless data communication system, a master device (31), and a slave device (32, 33, 34, 35), comprising wireless data communication means (22) for transmitting and receiving data packets between the devices (31,32, 33, 34, 35) using a synchronized data communication protocol. In the protocol, the time period to be used between consecutive packets to be transmitted is defined on the basis of the calculated number of data packets received by the master device (31) in a predetermined time period.

Abstract: The invention comprises an apparatus meant to be carried by a user for dosing a drug, a method for dosing drug and a wireless remote control for a drug pump. The apparatus comprises a drug pump (1), a computer (9), which is arranged to control the pump, control units (10) for transmitting control functions from the user to the computer, indicators (11) for transmitting information from the computer to the user, a measuring device (12), which is arranged to produce information about the physical activity of the user, means of calculating the amount of drug needed by the user based on the information produced by the measuring device.