Abstract: Technologies directed to respiration monitoring based on noise channel state information (CSI) data are described. A method includes receiving CSI data representing channel properties of a wireless channel used by a first wireless device and a second wireless device located in a geographical region. The method generates a set of CSI samples by sampling the CSI data and removes one or more outlier CSI samples using a sparse outlier process, and removes a cluster of outlier samples using a cluster outlier process. The method determines Fast Fourier Transform (FFT) data for each channel subcarrier index and a signal-to-noise ratio (SNR) value for each channel subcarrier index, and identifies a first number of channel subcarrier indexes having highest SNR values to obtain a subset of FFT data, which represents a breathing spectrum. The method determines a respiratory rate of a user in the geographical region from the subset of the FFT data.

Abstract: A method of analyzing soil using a modular sensor device. The modular sensor device including a sensor bus head, a sensor bus terminus, and a sensor rod in a stacked arrangement. The sensor rod disposed between the sensor bus head and the sensor bus terminus. The method including setting on an output pin of the sensor bus. The method further including, subsequent to setting the output pin of the sensor bus, detecting a transition on an input pin of the sensor rod, the output pin of the sensor bus and the input pin of the sensor rod being part of a daisy chain. The method further including, in response to detecting the transition at the input pin of the sensor rod, enabling bidirectional communication between the sensor rod and the sensor bus head over a communication bus electrically coupling the sensor bus head to the sensor rod.

Abstract: A method of analyzing soil using a modular sensor device. The modular sensor device including a sensor bus head, a sensor bus terminus, and a sensor rod in a stacked arrangement. The sensor rod disposed between the sensor bus head and the sensor bus terminus. The method including setting on an output pin of the sensor bus. The method further including, subsequent to setting the output pin of the sensor bus, detecting a transition on an input pin of the sensor rod, the output pin of the sensor bus and the input pin of the sensor rod being part of a daisy chain. The method further including, in response to detecting the transition at the input pin of the sensor rod, enabling bidirectional communication between the sensor rod and the sensor bus head over a communication bus electrically coupling the sensor bus head to the sensor rod.

Abstract: A method of analyzing soil using a modular sensor device. The modular sensor device including a sensor bus head, a sensor bus terminus, and a sensor rod in a stacked arrangement. The sensor rod disposed between the sensor bus head and the sensor bus terminus. The method including setting on an output pin of the sensor bus. The method further including, subsequent to setting the output pin of the sensor bus, detecting a transition on an input pin of the sensor rod, the output pin of the sensor bus and the input pin of the sensor rod being part of a daisy chain. The method further including, in response to detecting the transition at the input pin of the sensor rod, enabling bidirectional communication between the sensor rod and the sensor bus head over a communication bus electrically coupling the sensor bus head to the sensor rod.

Abstract: A modular sensor system may include a sensor bus architecture configured for interchangeable sensor modules. Stackable sensor modules, such as rods, may have input/output (I/O) connectivity. The sensor modules may interconnect with a sensor bus head, a sensor bus terminus, and/or one another. The uppermost sensor module may connect to the sensor bus head, and the lowermost sensor module may connect to the sensor bus terminus. Between the sensor bus head and the sensor bus terminus, various sensor modules may be connected. The modular arrangement of the sensors in the system of some embodiments is provided such that the sensors are interconnected through a sensor bus network. The sensor bus communication scheme may allow hot-swapping of sensors and relatively low power operation for energy-constrained sensor data collection applications.

Abstract: A method of analyzing soil using a modular sensor device. The modular sensor device including a sensor bus head, a sensor bus terminus, and a sensor rod in a stacked arrangement. The sensor rod disposed between the sensor bus head and the sensor bus terminus. The method including setting on an output pin of the sensor bus. The method further including, subsequent to setting the output pin of the sensor bus, detecting a transition on an input pin of the sensor rod, the output pin of the sensor bus and the input pin of the sensor rod being part of a daisy chain. The method further including, in response to detecting the transition at the input pin of the sensor rod, enabling bidirectional communication between the sensor rod and the sensor bus head over a communication bus electrically coupling the sensor bus head to the sensor rod.

Abstract: A modular sensor system may perform soil and water analysis at various depths. For instance, chemical composition may be determined and concentration and/or environmental parameters, such as pressure, temperature, and/or moisture, may be measured at different depths. A sensor bus head, at least one sensor rod, and a sensor bus terminus may be vertically stacked and interconnected through a bus network such that the system is modular and reconfigurable.

Abstract: A modular sensor system may perform soil and water analysis at various depths. For instance, chemical composition may be determined and concentration and/or environmental parameters, such as pressure, temperature, and/or moisture, may be measured at different depths. A sensor bus head, at least one sensor rod, and a sensor bus terminus may be vertically stacked and interconnected through a bus network such that the system is modular and reconfigurable.

Abstract: A modular sensor system may include a sensor bus architecture configured for interchangeable sensor modules. Stackable sensor modules, such as rods, may have input/output (I/O) connectivity. The sensor modules may interconnect with a sensor bus head, a sensor bus terminus, and/or one another. The uppermost sensor module may connect to the sensor bus head, and the lowermost sensor module may connect to the sensor bus terminus. Between the sensor bus head and the sensor bus terminus, various sensor modules may be connected. The modular arrangement of the sensors in the system of some embodiments is provided such that the sensors are interconnected through a sensor bus network. The sensor bus communication scheme may allow hot-swapping of sensors and relatively low power operation for energy-constrained sensor data collection applications.