A sensor device comprising: a sensor (86, 88) controlled to produce time domain data representative of a sensed time dependent characteristic adjacent the sensor; a signal processing component comprising: - an FFT-implementer arranged to use the time domain data to produce frequency domain data indicative of frequency components present in the time domain data; the sensor device comprising - a data transmission component arranged to transmit a portion of the frequency domain data using a LPWAN protocol; characterized in that the signal processing component further comprises: - a power manager arranged to control provision of power to at least one sensor device component of said sensor device based on defined power management criteria, the power management criteria defining wake up and sleep times whereby power to the at least one sensor device component is caused to be connected during wake time and power to the at least one sensor device component is caused to be disconnected during sleep time; and in that the sensor device is arranged to: select a subset of frequency domain data from the frequency domain data, based on defined Fast Fourier Transform characteristics in a configuration setting of the sensor device; and transmit the selected subset of frequency domain data in a single data packet using the LPWAN protocol. a sensor (86, 88) controlled to produce time domain data representative of a sensed time dependent characteristic adjacent the sensor; a signal processing component comprising: - an FFT-implementer arranged to use the time domain data to produce frequency domain data indicative of frequency components present in the time domain data; the sensor device comprising - a data transmission component arranged to transmit a portion of the frequency domain data using a LPWAN protocol; characterized in that the signal processing component further comprises: - a power manager arranged to control provision of power to at least one sensor device component of said sensor device based on defined power management criteria, the power management criteria defining wake up and sleep times whereby power to the at least one sensor device component is caused to be connected during wake time and power to the at least one sensor device component is caused to be disconnected during sleep time; and in that the sensor device is arranged to: select a subset of frequency domain data from the frequency domain data, based on defined Fast Fourier Transform characteristics in a configuration setting of the sensor device; and transmit the selected subset of frequency domain data in a single data packet using the LPWAN protocol. - an FFT-implementer arranged to use the time domain data to produce frequency domain data indicative of frequency components present in the time domain data; the sensor device comprising - a data transmission component arranged to transmit a portion of the frequency domain data using a LPWAN protocol; characterized in that the signal processing component further comprises: - a power manager arranged to control provision of power to at least one sensor device component of said sensor device based on defined power management criteria, the power management criteria defining wake up and sleep times whereby power to the at least one sensor device component is caused to be connected during wake time and power to the at least one sensor device component is caused to be disconnected during sleep time; and in that the sensor device is arranged to: select a subset of frequency domain data from the frequency domain data, based on defined Fast Fourier Transform characteristics in a configuration setting of the sensor device; and transmit the selected subset of frequency domain data in a single data packet using the LPWAN protocol. - a power manager arranged to control provision of power to at least one sensor device component of said sensor device based on defined power management criteria, the power management criteria defining wake up and sleep times whereby power to the at least one sensor device component is caused to be connected during wake time and power to the at least one sensor device component is caused to be disconnected during sleep time; select a subset of frequency domain data from the frequency domain data, based on defined Fast Fourier Transform characteristics in a configuration setting of the sensor device; and transmit the selected subset of frequency domain data in a single data packet using the LPWAN protocol.