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 relates to a wristop computer and a method in connection with a wristop computer (20). The display of the wristop computer intended for a compass application consists of a matrix-display element (1). The wristop computer includes means (10, 11, 12) for showing the compass points to the possessor of the wristop computer, with the aid of graphical symbols. According to the invention, the wristop computer includes means (1, 11, 4) for showing several predefined bearing values (2) for travelling over various closed patterns.

Abstract: The invention relates to a wristop computer and a method in connection with a wristop computer (20). The display of the wristop computer intended for a compass application consists of a matrix-display element (1). The wristop computer includes means (10, 11, 12) for showing the compass points to the possessor of the wristop computer, with the aid of graphical symbols. According to the invention, the wristop computer includes means (1, 11, 4) for showing several predefined bearing values (2) for travelling over various closed patterns.