Abstract: A data-transmission system, comprising measurement means, having memories, to create and collect measurement data, an output device having a zero-power passive state, to show in the zero-power passive state, machine-readable code containing the measurement data created using the measurement means, a power supply for the output device and the measurement means, a server arrangement to process and/or store the measurement data, and one or several reader devices to read the code from the output device in the zero-power passive state and arranged for data transfer with the server arrangement. The output device and measurement means with memories are to be arranged at monitoring objects.

Abstract: A data-transmission system, comprising measurement means, having memories, to create and collect measurement data, an output device having a zero-power passive state, to show in the zero-power passive state, machine-readable code containing the measurement data created using the measurement means, a power supply for the output device and the measurement means, a server arrangement to process and/or store the measurement data, and one or several reader devices to read the code from the output device in the zero-power passive state and arranged for data transfer with the server arrangement. The output device and measurement means with memories are to be arranged at monitoring objects.