Questions tagged [sensors]

For questions about simple IoT devices that can only monitor the physical world and report these observations. Examples are devices that just monitor the state of your lights, radiator settings, power plugs, fans or door locks. If the device is able to change those settings use the tag [actuators] or a more specific one.

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1answer
115 views

Polling multiple GPIOs

I am trying to pull a few bytes per second from a microchip board attached to a temperature sensor and a photodiode, using Windows 10 IoT on a Dragonboard 410c. It seems like there's either ...
12
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1answer
704 views

How to detect a presence (not motion) of anyone in a room?

I'd like to monitor a state of rooms in my apartment and turn off heating/cooling/lights when nobody is there. I see there is a bunch of PIR sensors on the market, however I don't understand why some ...
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0answers
186 views

Is there any scream detect sensor or scream recognition program?

I'm developing smart IoT product which will be placed on underground parking lot. Among the various feature, one require scream detection. I heard that there are several feature includes scream ...
4
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0answers
77 views

Where can I buy "all-in-one" sensors? [closed]

I am looking for all-in-one sensors that I can buy off the shelf. All-In-One means that they should have BLE and Battery in the device itself! I would be looking for Temperature, Humidity & ...
10
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3answers
814 views

Power reduction for Raspberry Pi GPS/GSM tracker

I've recently built a fully functional IoT GPS/GSM tracker with a Pi Zero for a college project and now that it's finished and done with, I would like to minimize the current draw of the entire system ...
19
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4answers
957 views

Battery backup for small IoT devices?

I'm making a number of small devices such as temperature sensors, RF433 transmitter and receiver (for controlling and receiving devices => MQTT) mostly using EPS8266. They work fine, and are USB ...
9
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2answers
891 views

Does the Ōura ring measure heart rate well enough to assess HRV?

The wrist-worn devices generally don't measure the heart rate precisely enough to measure heart rate variability (HRV). Does the Ōura ring measure heart rate precisely enough to get quality HRV data?
5
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1answer
100 views

Modernise old door opening office system

Is there a way to relatively easily modernise an old door opening system in the office (like on the image) and make it work with IoT? Build an app to open the door (in the first place) and if possible ...
4
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2answers
134 views

Motion sensor to monitor the movement of people

I'm about to start an investigation about people movement after a surgery (walk basically). I would like to know where should I start to look for movement sensors (pedometer/accelerometer). This ...
11
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3answers
4k views

A low cost alternative option for ZigBee stack in mesh network of sensors

We're in the step of making design decision for a wireless mesh network of individual sensors which is going to be low cost. At first research I decided to use MQTT for application layer and global ...
2
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0answers
203 views

Standalone accelerometers to track the movement of bow limbs [closed]

I'd like to track the movement of my bow limbs. I think I can install a pair of accelerometers and analyze the logs to see what happens upon full draw and release. Each accelerometer should be small ...
9
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2answers
2k views

What are some good tools for graphing sensor values?

I'm using Home Assistant for my home automation, it has some basic graphing capabilities but only for the last 24 hours. I'd like to create graphs both with fine granularity and over long periods of ...
8
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1answer
304 views

UK m590e, Use GSM,GSM compact or UTRAN? (AT+COPS)

I am based in the UK. I am using an M590e module for a remote weather station. Which parameter should I use for the AT+COPS command? GSM, GSM compact or UTRAN? Which are available in the UK? Which ...
9
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2answers
265 views

Will multiple simultaneous biometric sensors create unbreakable security for devices?

This article quotes the CEO of Image Ware, [The solution] according to Miller, is multi-modal biometrics which he claims makes it virtually impossible for the wrong person to access computer ...
-4
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1answer
63 views

Acquisition of data from non automated old machinery in IIOT [closed]

Could you tell me how to get the data from the non automated old machinery using Industrial Internet of Things?
15
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3answers
310 views

Using LP Gas Sensor in a Smart Home Safety System

We are making a smart home safety system for a small academic project (Yes. I am a newbie for this). We need a Gas Sensor (LP Gas) for the project, but there are a few questions that I have. I found ...
7
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2answers
2k views

How to calculate frequency with the voltage received from a vibration sensor?

I have been working on a project recently and I am using Sensor SPM SLD 723 to read variations in vibrations. The output I received from the sensor is only in volts, how can I convert this voltage ...
9
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1answer
595 views

Home automation sensors over WiFi

I want to build a home automation system by hooking up various sensors (e.g., passive IR motion sensors, magnetic door contact switches, vibration detectors, etc.) around the house to detect things ...
7
votes
1answer
255 views

How does transmit power influence the accuracy of beacon sensor readings?

I have some Bluvision Beeks beacons equipped with temperature sensors. I can adjust their transmit powers. I am wondering if setting a higher transmit power for a particular beacon will result in a ...
8
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2answers
3k views

Automatically open a garage door when approaching by car?

There is this thing I noticed in my neighborhood: when Sam is waiting for his not-so-automatic door to open, he stops the traffic for 20 or 30 seconds, due to the street configuration. I want to buy ...
13
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3answers
883 views

What is the power implication of encrypting my sensor traffic?

Considering a typical type of application, a battery powered sensor taking readings (32 bit value) every 10 minutes, what is the likely impact on battery life if I choose a simple un-encrypted on-air ...
6
votes
1answer
188 views

How can I aggregate QS data from different sources on one and unique dashboard?

I would like to automatically aggregate QS data, biofeedback data and neurofeedback data from different applications into one dashboard. Data is collected from; Gear S2, Withings body scale, Withings ...
11
votes
6answers
1k views

Measure people density in an outdoor area

I'm currently working on a project and I need to measure how many people are in an area without any personal interaction. Basically I need to do this in parks. I don't have lot of budget for each ...
7
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2answers
195 views

Why might data be sent to a cloud service when it could be processed on the edge?

I was recently reading Amazon's information about the AWS IoT Platform, and came across an interesting example use case: Although they don't describe how exactly the road condition data is sensed, if ...
8
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1answer
465 views

What should be considered when building a wireless sensor network?

This question originates from a question asking about a specific detail about building wireless sensor networks. While answering the question, I wanted to share some general guidelines for the ...
13
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2answers
711 views

Temperature sensors affected by rain

I am not sure if this is the best place to ask a question like this. I am working with a wireless sensor network that measure temperature, humidity and illuminance. I have read that outside sensors, ...
9
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3answers
1k views

Do any outdoor sound sensors exist?

I recently had an F/A-18 jet fly over my house and was amazed at how loud it was. That set me to wondering how loud it actually was. Do any outdoor sensors exist that can track decibel level?
21
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5answers
1k views

Is there any advantage in encrypting sensor data that is not private?

Some sites, such as this article on end-to-end encryption for IoT, suggest that all traffic sent across the IoT network should be encrypted, saying: Enterprises, government agencies and other ...
10
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2answers
2k views

How accurate is the calorie burn measurement of the Fitbit Charge 2?

In academia calorie burn gets measured about the produced heat in a closed system. How accurate is the Fitbit Charge 2 when compared against that gold standard?
10
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1answer
762 views

Connecting a sensor to ZigBee

I am planning to measure water level in a well, which is about 10 m deep with maximum water level up to 5 m. My plan is to use ultrasonic sensor HC SR04 to measure depth, transmit it via ZigBee to a ...
7
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1answer
223 views

What does the Lively Medical Alert Watch Monitor?

According to MakeUseOf.com, the Lively Medical Alert Watch... ... allows remote health monitoring of your loved ones. The smartwatch can track steps taken as well as other kinds of daily activities,...

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