Guildford hw
#IoT
#TelosB
#XM1000
#wireless communication
#experimentation nodes
#Advanticsys
#device heterogeneity
#deployment
Description: The current testbed deployment offers a degree of device heterogeneity by integrating two different types of IoT experimentation nodes. The deployment primarily consists of a widely utilized TelosB experimentation platform (170 nodes) and, to a lesser extent, XM1000 devices from Advanticsys (80 nodes). The focus will mainly be on the TelosB-based IoT experimentation nodes, which utilize custom-made sensing units. The XM1000 devices are used in their default configuration and are equipped with standard sensor boards (temperature, light, and humidity). More information on the XM1000 can be found on the Advanticsys website. The sensor node platform is an off-the-shelf TelosB mote manufactured by XBow, and it is one of the most popular platforms in the Wireless Sensor Network (WSN) community, with extensive support for the TinyOS and Contiki operating systems. The TelosB offers several key features. The XM1000 also shares similar characteristics and supports TinyOS but includes a larger program space (116KB compared to the 48KB provided by the TelosB), making it more suitable for experimentation with Over-the-Air reprogramming solutions. The energy meter used is an off-the-shelf product from Plogg International and is interfaced with the sensor node platform via a small interfacing board. This energy meter can be read at a maximum frequency of once every two seconds and allows for the measurement of various characteristics from connected appliances. The multimodal sensing unit is based on a custom-designed board capable of detecting ambient light and noise levels, ambient motion, temperature, and vibration. The circuit design and PCB layout are illustrated in the accompanying figures. Four of the sensors that measure ambient conditions are positioned at the front of the housing containing the designed board, while the vibration sensor is located inside the housing, as it only measures parameters relative to the IoT unit. A LED on the unit provides visual feedback during sampling through the multi-modal sensing unit or can be utilized for other visual notifications. A brief description of each sensor follows, with additional detailed information available in the referenced data sheets.
Light sensor: The light sensor employed is a Perkin Elmer VTB8840BH photodiode, sensitive to visible light, with a spectral range of 330-720nm and a peak response at 580nm. The data obtained from the photodiode will be relative rather than absolute values of the light intensity; calibration would be necessary for absolute measurements.
Temperature sensor: The temperature sensor used in the PEN is an Analog Devices TMP36GZ device, with a functional range of -40 to +125°C and a scale factor of 10mV/°C. It has an accuracy of ±2°C and a typical linearity of ±0.5°C over its functional range. This sensor was selected for its cost-effectiveness, as more accurate devices are available but are significantly more expensive, making them impractical for large-scale deployments. Its primary role is to assist in inferring the status of the room (e.g., whether heating or air conditioning is active, or if windows are open).
Motion sensor: The motion sensor integrated into the PEN is a Matsushita AMN1112 Passive InfraRed (PIR) device, capable of detecting lateral movements of approximately 20cm within a distance of 2m over a 110-degree horizontal arc across the front of the sensor.
Noise sensing circuit: The microphone integrated within the PEN has a sensitivity of -62dB (0dB = 1V/µBar) and a frequency response suitable for the intended applications.
The overall design of the system emphasizes modularity, allowing for easy integration and potential expansion of the sensing capabilities. Each sensor's output can be processed by the TelosB or XM1000 platforms, enabling real-time data collection and analysis for various IoT applications. The use of off-the-shelf components ensures reliability and ease of replacement, while the custom-designed sensing unit allows for tailored measurements specific to the deployment's goals.The current testbed deployment provides some degree of device heterogeneity by integrating two different type of IoT experimentation nodes. The deployment is mainly based on a largely utilized TelosB experimentation platform (170 nodes) and to a smaller extend of XM1000 devices from Advanticsys (80 nodes).
In the following we will mainly focus on the Telos B based IoT experimentation nodes, as they are based on a custom made sensing units. The XM100 are used out of the box and are equiped with the default sensor boards (temperature, light and humidity). More details on the XM1000 can be found here: Advanticsys XM1000. The sensor node platform is an off-the-shelve TelosB mote manufactured by XBow Telos B Datasheet. The platform is one of the most popular one in the WSN community and wide support for TinyOS and Contiki operating systems are available.
The TelosB provides the following main features: Similar characteristics and the support for TinyOS are available on the XM1000 with the addition of a larger program space (116KB with respect to the 48KB provided by TelosB) that makes this platform more suitable for experimentation with Over-the-Air reprogramming solutions. The energy meter is an off-the-shelve energy meter from Plogg international. It is interfaced to the sensor node platform via a small interfacing board. The energy meter can be read with a maximum frequency of once every two seconds. The energy meter allows the meassurement of the following characterstics from appliances connected to it: The multimodal sening unit is based on a custom designed board.
It is able to detect the following modes: ambient light and noise levels, ambient motion, temperature and vibration. The circuit of the board design and the PCB layout are presented in the figures below. As shown in the figure below, 4 of the sensors measure ambient state and are therefore exposed at the front of the housing in which the designed board is contained.
The vibration sensor is inside of the housing, as it only measures parameters with respect to the IoT unit. A LED on top of the unit provides visual feedback when sampling through the multi-modal sensing unit takes place or it can be used to provide any other required visual feedback.
In the following a brief description to each of the sensors is provided. Futher more detailed information can be found in the referenced data sheets. Light sensor: The light sensor that will be used is a Perkin Elmer VTB8840BH photodiode that is sensitive to visible light. It has a spectral range of 330-720nm with a peak in its spectral response at 580nm. The data obtained from the photodiode will be relative and not absolute values of the intensity of the light impinging on it.
In order to get an absolute value, the photodiode would have to be calibrated. Download datasheet here ” Temperature sensor:The temperature sensor that will be used in the PEN`s is an Analog Devices TMP36GZ device. This sensor has a functional range of -40 to +125 C with a scale factor of 10mV/ C. It has an accuracy of ±2 C and a ±0. 5 °C typical linearity over the functional range. This particular device was chosen because of its cost. There are more accurate devices on the market but they are considerably more expensive and hence not very practical for large-scale deployments.
The primary role of this sensor is to aid in inferring the status of the room (e. g. is the heating/air conditioning on Are the windows possibly open, etc. ), Download datasheet here ” Motion sensor: The motion sensor integrated into the PEN is a Matsushita AMN1112 Passive InfraRed (PIR) device. The sensor is capable of detecting lateral movements of approximately 20cm, within a distance of 2m (over a 110 horizontal arc across the front of the sensor) from the PEN unit.
Download datasheet here ” Noise sensing circuit: The microphone used in the PEN has a sensitivity of -62dB (0dB=1V/ µBar) and a frequency respon
Light sensor: The light sensor employed is a Perkin Elmer VTB8840BH photodiode, sensitive to visible light, with a spectral range of 330-720nm and a peak response at 580nm. The data obtained from the photodiode will be relative rather than absolute values of the light intensity; calibration would be necessary for absolute measurements.
Temperature sensor: The temperature sensor used in the PEN is an Analog Devices TMP36GZ device, with a functional range of -40 to +125°C and a scale factor of 10mV/°C. It has an accuracy of ±2°C and a typical linearity of ±0.5°C over its functional range. This sensor was selected for its cost-effectiveness, as more accurate devices are available but are significantly more expensive, making them impractical for large-scale deployments. Its primary role is to assist in inferring the status of the room (e.g., whether heating or air conditioning is active, or if windows are open).
Motion sensor: The motion sensor integrated into the PEN is a Matsushita AMN1112 Passive InfraRed (PIR) device, capable of detecting lateral movements of approximately 20cm within a distance of 2m over a 110-degree horizontal arc across the front of the sensor.
Noise sensing circuit: The microphone integrated within the PEN has a sensitivity of -62dB (0dB = 1V/µBar) and a frequency response suitable for the intended applications.
The overall design of the system emphasizes modularity, allowing for easy integration and potential expansion of the sensing capabilities. Each sensor's output can be processed by the TelosB or XM1000 platforms, enabling real-time data collection and analysis for various IoT applications. The use of off-the-shelf components ensures reliability and ease of replacement, while the custom-designed sensing unit allows for tailored measurements specific to the deployment's goals.The current testbed deployment provides some degree of device heterogeneity by integrating two different type of IoT experimentation nodes. The deployment is mainly based on a largely utilized TelosB experimentation platform (170 nodes) and to a smaller extend of XM1000 devices from Advanticsys (80 nodes).
In the following we will mainly focus on the Telos B based IoT experimentation nodes, as they are based on a custom made sensing units. The XM100 are used out of the box and are equiped with the default sensor boards (temperature, light and humidity). More details on the XM1000 can be found here: Advanticsys XM1000. The sensor node platform is an off-the-shelve TelosB mote manufactured by XBow Telos B Datasheet. The platform is one of the most popular one in the WSN community and wide support for TinyOS and Contiki operating systems are available.
The TelosB provides the following main features: Similar characteristics and the support for TinyOS are available on the XM1000 with the addition of a larger program space (116KB with respect to the 48KB provided by TelosB) that makes this platform more suitable for experimentation with Over-the-Air reprogramming solutions. The energy meter is an off-the-shelve energy meter from Plogg international. It is interfaced to the sensor node platform via a small interfacing board. The energy meter can be read with a maximum frequency of once every two seconds. The energy meter allows the meassurement of the following characterstics from appliances connected to it: The multimodal sening unit is based on a custom designed board.
It is able to detect the following modes: ambient light and noise levels, ambient motion, temperature and vibration. The circuit of the board design and the PCB layout are presented in the figures below. As shown in the figure below, 4 of the sensors measure ambient state and are therefore exposed at the front of the housing in which the designed board is contained.
The vibration sensor is inside of the housing, as it only measures parameters with respect to the IoT unit. A LED on top of the unit provides visual feedback when sampling through the multi-modal sensing unit takes place or it can be used to provide any other required visual feedback.
In the following a brief description to each of the sensors is provided. Futher more detailed information can be found in the referenced data sheets. Light sensor: The light sensor that will be used is a Perkin Elmer VTB8840BH photodiode that is sensitive to visible light. It has a spectral range of 330-720nm with a peak in its spectral response at 580nm. The data obtained from the photodiode will be relative and not absolute values of the intensity of the light impinging on it.
In order to get an absolute value, the photodiode would have to be calibrated. Download datasheet here ” Temperature sensor:The temperature sensor that will be used in the PEN`s is an Analog Devices TMP36GZ device. This sensor has a functional range of -40 to +125 C with a scale factor of 10mV/ C. It has an accuracy of ±2 C and a ±0. 5 °C typical linearity over the functional range. This particular device was chosen because of its cost. There are more accurate devices on the market but they are considerably more expensive and hence not very practical for large-scale deployments.
The primary role of this sensor is to aid in inferring the status of the room (e. g. is the heating/air conditioning on Are the windows possibly open, etc. ), Download datasheet here ” Motion sensor: The motion sensor integrated into the PEN is a Matsushita AMN1112 Passive InfraRed (PIR) device. The sensor is capable of detecting lateral movements of approximately 20cm, within a distance of 2m (over a 110 horizontal arc across the front of the sensor) from the PEN unit.
Download datasheet here ” Noise sensing circuit: The microphone used in the PEN has a sensitivity of -62dB (0dB=1V/ µBar) and a frequency respon
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