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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25 views

Automate radiators per room - With motion/presense sensing [closed]

With about ten people we rent a building. We pay thousands and thousands of Euro's each year for gas for heating. The building has one thermostat which switches all rooms. So, if one person goes to ...
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1answer
13 views

4-Channel 16-Bit ADC for Raspberry Pi (ADS1115) - Can I connect two analog sensors?

I have a RP4 and thinking about buying EC and PH sensors from Grove. I've learned that RP4 doesn't have an analog input so I'm thinking about connecting it through ADS1115 from Grove. I'm not sure ...
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1answer
28 views

How can I identify what kind of IoT device is in my network?

I am trying to build a system in which IoT devices can connect and are classified without the need for manual checks by the system administrator. In this system, IoT devices will send data, and on the ...
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1answer
259 views

Is a simple UDP messaging a good idea for IoT Sensor?

I am working with NB-IoT Modem - Quectel BC95 that will be used in a simple IoT sensor that will periodically (Once per hour) send measurements to our server. Because of the restriction in place by ...
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1answer
38 views

Wheel skid detection

I am working on a project which sensed four speed by using hall sensor attached to wheel by using raspberry pi. I have wrote program for that only issue with that it gives fairly good results when ...
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1answer
77 views

LoRaWAN remote sensor node platform

Which platform can you recommend for a LoRa/LoRaWAN remote sensor node, which fulfills the following criteria? Detects presence of people in 15-minute interval (e.g. with a RCWL-0516) Reports the ...
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23 views

FIWARE: NGSI-compatible sensors for IoT data gathering [closed]

I am preparing to conduct a research for IoT, collecting environmental data from different sources (temperature, humidity, light, air quality, GPS, etc...). What could the best set of tools or ...
2
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1answer
57 views

How to collect data from AM 2302 temperature sensors over long wires?

I am trying to monitor the grain temperature in 4 roughly 25ft grain bins. I currently am monitoring temperature in one 15ft bin with the AM 2302 sensor, and it appears to be working. I just made a ...
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2answers
71 views

Decoupling data fetching from processing and publishing

I am working on a project that involves raspberry pi and the accelerometer sensor ADXL355. The raspberry's responsibility is to fetch the data from the sensor, filter only useful data and publish it ...
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0answers
40 views

Are micron feature-size LIDAR sensors available?

I want to scan various writing materials such as card, cloth, various grades and qualities of paper, wood, even hemp-based or other writing surfaces. The reason is I wish to write a GPU-accelerated ...
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28 views

Looking for LoRaWAN sensor to detect gym equipment use

I'm guessing I can determine if someone is using a treadmill or even a bench press by detecting vibration. Would it be feasible to sense this for a costs below $5 per piece of equipment being ...
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1answer
45 views

Where to find Desktop Occupancy Sensors without attached service

I was curious and wanted to see, what it might take to build your own desk availability solution. It seems the way to go is to use some kind of lowband pir sensors, but my Google-fu is rather poor. I ...
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73 views

What Kinda of Trigger to Use for a System with Two Raspberry-Pi's

I have a system like the image shows. Now instead of it being connected with an Ethernet cable, it is going to be wireless. The SBC's represent Raspberry Pi's. SBC0 reads the data all the time and is ...
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30 views

Suitable graph generator for models of homogeneous WSNs with 100 to 300 nodes?

Which graph generation models are suitable as representation of large-scale (100-300 nodes) homogeneous wireless sensor nodes, in case I am only interested in the interconnection of those nodes and ...
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2answers
60 views

Is MQTT a good choice for my application?

For a university project I need to have a couple of "things" that collect data and which we will then be able to view and manipulate. At the moment each of the devices will consist of a few ...
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1answer
25 views

Is there a Hub that can receive a 915Mhz signal and report on it?

I'm looking for a device that can detect (and report to my raspberry pi) the presence of a signal from my Switcheroo: Switcheroo - Sync Lights with No App, WiFi, Bluetooth, or Remote Control | Change ...
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16answers
8k 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 IoT Meta) about energy harvesting in IoT. It lists a couple of harvestable energy sources ...
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1answer
45 views

What types of proximity sensors would fit this bicycle application?

I'm looking into proximity sensors for bicycle attachments. The idea is to detect when a car passes close by to a rider. What are some types of proximity sensors that would be: Cheap Range up to 2 ...
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2answers
122 views

Pushing Processed data from RFID + Sensors to a Platform

I have some sensor nodes (Bosch XDKs) that send information to an MQTT broker and an application reads the information and stores it into InfluxDB. Simultaneously, I have RFID readers that scan some ...
3
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1answer
83 views

Detecting static human? How? Which Sensor?

I am new to this community and I apologize for my bad English. I am interested in Home automation I am working on my new project. Where the requirement is to use a sensor for Automatic Light on/off ...
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46 views

Tracking speed and direction of golf ball

I'm working on a prototype for a cheap launch monitor as a cheap alternative to the expensive ones on the market atm. Question: I'm looking for a sensor or sensors that can track the following High-...
16
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1answer
428 views

Wired sensor protocol for buildings monitoring sensors?

Assuming I cannot use wireless technologies such as LoRa, LTE-M or SigFox in the environment for the install, I must use a wired sensor protocol to communicate with the gateway installed remotely in a ...
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1answer
31 views

ds18b20 reading oscillating [closed]

I have two ds18b20 connected in star topology (3m cable) to a wemos d1 mini inside a cold chamber and sometimes the temperatures are like following a sinewave. Any idea where that might come from ? ...
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45 views

Mini weather station project not working

I have been trying to do this project for 2 weeks. The project is about mini weather station. It uses esp8266, DHT11 sensor,BMP180 sensor and FC 37 rain sensor. I have taken reference from the ...
22
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3answers
6k views

Repurpose ADT sensors

My wife and I just purchased a new house and the ADT Security sensors were still installed, but no keypad panel. After speaking with a Rep on pricing and logistics, we decided not to continue the ...
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5answers
13k 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 ...
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0answers
43 views

mail in box detector

I would like to monitor my physical mailbox so I can know when something is inserted in it. The reason is this was an abandonned mailbox for years so people are used to put the junk mails in it (...
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0answers
27 views

Simple two-sensor digital thermometer with an alert when the temperatures match?

Where I live, it gets hot in the summer (but usually not so hot that I need AC on), but the nights usually cool down to a beautifully cool temperature. I like to open windows when it gets cooler ...
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0answers
33 views

Ambient Light Sensor to monitor light levels in buildings for warranty post LED upgrade

We are a lighting service contractor that installs and maintains lighting systems and controls. I would like to be able to offer a system that can monitor light levels using a proprietary web portal ...
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1answer
35 views

Reading from sound sensors or gateways with high level languages

I was asked to implement a system for collecting data from a sound sensor. I have no idea where to start so I'm asking for some guidelines since IoT is completely new to me. The place where the data ...
3
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2answers
128 views

ESP32 always high pins screwing analog measure

TL;DR When trying to use some pins of my ESP32 to read analog signals, it turns out those pins have a non-zero voltage, messing up the measurements. Why? I got myself an Olimex ESP32-POE-ISO (see ...
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0answers
38 views

Delayed IIO Sensor Readings

I am reading sensor data off of a Dell gateway, and noticing that the sensor data at iio:device2 seems to have a delay of ~1 second when reading using cat /sys/bus/iio/devices/iio:device2/in_temp_raw ...
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2answers
70 views

Temperature sensors: DIY ESP8266 vs product

I want to deploy few temperature sensors in my flat: few rooms, two balconies, one outside. Sensors should send data into my server (thinking about Rpi with Prometheus DB and Grafana dashboard). ...
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0answers
39 views

Storing sensor data on very small iot device for 5 days before downloading the data [closed]

We have a small battery driven IoT device that is collecting data from 3 bio sensors. We need to store this data on the little device for 5 days. The main MCU is a Max32660. Would love to get some ...
5
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1answer
161 views

MQTT for many-to-one communication

I have an architecture where many sensors (hundreds of them), located in different places (hundreds of kilometers apart), send data to a remote database. Is MQTT suitable for this kind of ...
2
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2answers
63 views

How do I minimize cellular data usage for my embedded project?

I have an embedded project that is transferring data from the device to my server over a TLS cellular connection. The device needs to communicate with the server only when the sensor captures some ...
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1answer
43 views

Bluetooth Input Hub

I am wondering if anyone knows about some existing 'off the shelf" hardware options where some device could connect to this Bluetooth "Input Hub" where this hub can have inputs plugged into it and any ...
5
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2answers
65 views

Read I²C Sensor via openHAB

I am using a voltage sensor which communicates over I²C, a Python script is handling all the communication and logic in a Raspberry Pi. Since I want to switch to openHAB I am wondering how to read ...
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1answer
49 views

Any info on where to get a water sensor with wireless connection [closed]

Am currently working on my final year project and am in desperate help with a sensor I need a water sensor that can connect wirelessly to a database.
2
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1answer
88 views

Building bidirectional people counting sensor

I am trying to build a people tracking sensor for counting the traffic of a specific area (building or shopping street). I need to detect people coming in or out of a room, also if two people are ...
12
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2answers
515 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 ...
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0answers
31 views

Which conferences and journals are notably trusted in the area of wireless sensor networks?

I am trying to get into the field of security concerning wireless sensor networks and found several good books and papers. But still this research topic is filled with fraud publications on ...
2
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1answer
45 views

Motion detector system that can be flashed remotely

I want to build a motion detector that performs a similar service to security services, which notify me upon intrusion and provide video feed. The other main requirement is that I can update the ...
6
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2answers
162 views

Encrypting sensor data on Raspberry Pi?

I am sending sensor data between two Raspberry Pis via lora. I am using two Lora Radios and NOT using a LoraWan network like The Things Network. How should I encrypt my data? Are there any open source ...
2
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1answer
62 views

How to program my own smart home with raspberrypi 3? [closed]

Hello smart home enthousiasts, I'm a software engineering student and I want to start a new project for myself. I really like smart home stuff, but I don't want anything to do with google or amazon. ...
2
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1answer
99 views

How to implement out-of-home when developing an IOT device?

I have a Raspberry Pi that tells you through web sockets and a sensor the amount of electricity you are spending in real time. I created an iPhone app as a front-end that basically just paints the ...
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0answers
38 views

Read real time multiple sensor [closed]

In case you have multiple sensors (temperature, pressure, etc) up to 20 in a system with different electrical interfaces. What is the best way to read values simultaneously (at exact the same time ...
0
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1answer
77 views

How can I build a network of 5 smartphones that log accelerometer data into a computer?

I would like to build a network consisting of 5 smartphones (preferably Android, if it makes any difference) that log synchronized accelerometer data into a computer (like a data-logger). How can I ...
1
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1answer
46 views

how to network a receiver to a public server

My company use sensors on doors to track activity and access control on the doors for many sites throughout the UK. We need to log this activity by sending UDP packets from the sensor's receiver to ...
8
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1answer
82 views

Sensors for a Validation Research

I've been searching for wireless sensors that could track the following metrics: Location (GPS) Heart Rate Head Movement Length of Steps Skin Conductance Pavement location (relative location compared ...