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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] ...

4
votes
1answer
42 views

How to decide how to select an endpoint device

This question is intentionally rather open ended, and potentially opinion based, but it is intended to act as a catch-all for the questions on how to select a device for a sensor/endpoint. Any ...
2
votes
3answers
68 views

When should the data from IoT devices be sent to the cloud?

I am configuring a Sonar Distance sensor to send data to a cloud. But the problem for me now is: I do not know when to send the data to this cloud. As far as I know, I could send the data ...
5
votes
1answer
35 views

Some type of movement sensor

I was wondering is there's a sensor or some type of sensor that would detect itself if it's been moved, say if I put the sensor in one end of the table and move it to the other end it will detect that ...
5
votes
0answers
33 views

Make ADT Door Sensors work with Ring security system?

Is there a way to modify ADT's Window and/or thin Door sensors in some way to work as door sensors for Ring's Home Security System? I am transitioning from an ADT security system to Ring's, but am ...
3
votes
1answer
37 views

Possibility of integrating secure elements with sensor networks?

Assume we need to do a type of digital signature such as ECDSA with sensors used in sensor networks. So, is there a secure and possible approach to store the keys in these sensors? For example, is ...
8
votes
2answers
100 views

How can I use End-to-end encryption in sensors network?

I have been reading about XMPP and its extensions. One of them called (XEP-xxxx: Sensor-Over-XMPP) which is really interesting. I have read also about another XMPP extension which is OMEMO protocol ...
5
votes
1answer
65 views

Simulation tools for centralized, decentralized, or distributed wireless sensor network

I want to simulate the collision avoidance between different objects that use (IoT based) centralized, decentralized, or distributed wireless sensor network. What are free software available to ...
4
votes
0answers
34 views

Dashboard of historical data in iot_datasourse

I have historical data stored in an SQL database as date in the format (2017.10.27 12:00:25) and the corresponding temperature in the format (26.55). I am using the node iot_datasourse to show the ...
2
votes
2answers
87 views

ESP8266 code using Python [closed]

I need to connect some sensors wireless using an ESP8266 which transfers data over my home Wi-Fi network from sensor to Raspberry Pi. Now, I was told on the Raspberry Pi Stack Exchange that when using ...
5
votes
1answer
85 views

Can environmental polluting gas sensors detect emissions of a low speed passing vehicle? [closed]

I am thinking to develop a remote-sensing applications for vehicle pollutions. In such cases generally expensive optical IR and UV sensors are used because more precise. On the contrary gas sensors ...
10
votes
2answers
385 views

What are affordable solutions to air quality monitoring system?

I would like to measure the air quality related to road traffic in a city for an IoT application. The European Environmental Agency has defined quality indicators (good, bad, etc) according to the ...
8
votes
2answers
138 views

What is difference between a mote and a microcontroller equipped with sensors and connectivity?

Reading some papers about IoT and Wireless Sensor Networks (WSN) I came across mote devices and have seen there are lots of them. I have understood that they are the leaves in an IoT system and that ...
7
votes
2answers
149 views

Local and distant MQTT communication

In my project I have a set of sensors in a local network that should communicate with a Raspberry Pi 3 and then with a distant MQTT broker. Since I'm using ESP8266 for the sensor nodes I thought I ...
5
votes
2answers
62 views

DS18B20 Oscillating Rapidly

I have an IoT device in the field measuring temperature next to a wind machine. See this video for an explanation as to what a wind machine is—basically a big fan attached to an engine. Last night, ...
5
votes
2answers
133 views

What is the best sensor for the measurement of Carbon-dioxide?

I need to measure the amount of carbon-dioxide in parts per million (ppm) within a closed environment. Currently, I am using a MQ-135 gas sensor which has some sort of concentration on Carbon-dioxide. ...
5
votes
0answers
80 views

What are the hubs for non-WiFi, DIY/open/hackable devices?

I would like to future-proof my home automation architecture Today, I have a very decentralized setup: an MQTT broker (Mosquitto) WiFi switches: two on-the-wire ones (Sonoff Basic) and one wall ...
9
votes
1answer
830 views

Which backend database is suitable for the IoT implementation

I have to provide the IoT service for my customer. MQTT, Kafka and Rest Services components will be used to ingest the data from the devices to the database. I need to do some analytics over the data ...
4
votes
1answer
156 views

MongoDB/Redis/CouchDB/Any Graph DB with S3 for IoT implementation

I have an IoT use-case (Should I use the MQTT protocol?) and decided to implement the SMACK architecture. I hope, Up and running the SMACK stack would be very much cost. Right now I am not expecting ...
1
vote
1answer
97 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 ...
11
votes
1answer
132 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 ...
1
vote
0answers
104 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
votes
0answers
62 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 & ...
7
votes
2answers
200 views

Lutron switch - turn off lights when nobody is in the room?

I have a room where the lights are controlled by a Lutron Caseta switch connected to a Lutron SmartBridge and Amazon Alexa. UPDATE: I don't require the use of Alexa in the solution, I'm just saying I ...
7
votes
1answer
109 views

NC-200 Park Sensor for vehicle detection

There's this module called NC-200 Park Sensor and there's barely any documents or videos about it. The AliExpress link is here. I wanted to know if anybody has worked with this thing before. I'm kind ...
5
votes
1answer
83 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
votes
2answers
115 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 ...
10
votes
3answers
896 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
votes
0answers
119 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 ...
8
votes
2answers
847 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
votes
1answer
147 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 ...
-4
votes
1answer
50 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?
7
votes
1answer
122 views

Which UK smart energy meters can be used as IoT sensors?

I want to know which Smart energy meters from UK suppliers can or cannot be used in IoT home-automation environment. Mainly, if I can add them as sensors in my home networks (Zigbee, Z-Wave, Wi-Fi, BT)...
10
votes
1answer
363 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 ...
11
votes
3answers
462 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 ...
8
votes
1answer
197 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
votes
2answers
379 views

Ways of testing IoT sensor security

I am supervising a group of students and their task is to build iot sensors for a few different tasks (ie temperature, movement). I want to score them on how securely they design their sensors among ...
10
votes
3answers
369 views

Easy to use bidirectional people counter for one location

I am looking for a bidirectional people counter for the entrance of one location to start. I am just testing some of my own ideas with the data generated by the device. The device needs the have the ...
10
votes
6answers
513 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 ...
11
votes
3answers
734 views

Speed limitations on moving sensors

After I watched this video of the docking scene in Interstellar sweded using a light bulb and a fan, I was thinking: Are there speed limitations with moving sensors, such as measuring a spinning ...
8
votes
1answer
377 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 ...
7
votes
2answers
100 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 ...
11
votes
2answers
397 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, ...
8
votes
2answers
1k 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 ...
7
votes
2answers
919 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 ...
31
votes
16answers
7k views

Where can I harvest energy in my home to power my wireless sensors?

I was reading this article, "Five Building Blocks of Self-Powered Wireless Sensor Nodes" (shared on Meta) about energy harvesting in IoT. It lists a couple of harvestable energy sources for example: ...
10
votes
4answers
751 views

Are there any IoT outdoor lighting sensors?

I have been looking for an ambient light sensor to use with other IoT smart home devices. In my opinion this would be a commonly requested device for controlling internal lighting. For example if you ...
6
votes
1answer
139 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 ...
9
votes
3answers
439 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?
13
votes
3answers
846 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 ...
9
votes
2answers
1k 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?