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.
115
questions
1
vote
1answer
20 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 ...
0
votes
0answers
33 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-...
1
vote
1answer
23 views
ds18b20 reading oscillating
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 ?
...
5
votes
1answer
54 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 ...
2
votes
0answers
36 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 (...
3
votes
0answers
21 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 ...
1
vote
0answers
29 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 ...
1
vote
1answer
34 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 ...
1
vote
0answers
44 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 ...
3
votes
2answers
65 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 ...
2
votes
0answers
32 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 ...
4
votes
2answers
64 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). ...
1
vote
0answers
37 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 ...
4
votes
1answer
88 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
votes
2answers
44 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 ...
0
votes
1answer
31 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 ...
-1
votes
1answer
44 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
votes
1answer
59 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 ...
1
vote
0answers
29 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
votes
1answer
35 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
votes
2answers
103 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
votes
1answer
60 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.
...
1
vote
0answers
33 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
votes
1answer
75 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
vote
1answer
44 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 ...
2
votes
0answers
62 views
Wanted: open source communicating, self contained, IoT source code firmware
this question could be borderline off-topic here, but I dare asking it still here for academic purposes. If it is off-topic, send me an email to basile@starynkevitch.net mentioning the URL of this ...
3
votes
1answer
31 views
What Is This IoT Project from Maker Faire Detroit? Connected Aloe?
At 2:27 in this teaser/promo video for Maker Faire Detroit, there's a brief clip of an aloe plant with some IoT type stuff. Presumably this is from either Maker Faire Detroit 2018, or a previous year. ...
2
votes
0answers
118 views
How to connect Raspberry PI 3 Model B to BLE Motion Sensor
I'm trying to connect my PIR motion sensor using gatttool and is giving me this error:
pi@raspberrypi:~ $ sudo gatttool -t random -b B8:7C6F:1A:D8:24 -I
[B8:7C6F:1A:D8:24][LE]> connect
Attempting ...
4
votes
2answers
103 views
Solution for Outdoor Geolocation
I am new to the Internet of Things space and would like to inquire if a solution exists / could be created for real-time geolocation of an intermittently mobile object (not an automobile)? The ...
2
votes
0answers
63 views
What are the sensors available to measure liquid levels? [closed]
What is the best sensor which can be integrated with esp32 and can be used to measure liquid level in a tank. I used HCSR04 and JSN but both of them were not good. Are there any other recommendations ...
1
vote
0answers
116 views
How to communicate with IoT gateway with C# [closed]
I'm a C# web developer and I just started handling an IoT project. My goal is to have this set up:
PIR Sensors > IoT Gateway > Website (ASP.NET Web Application C#)
For now, I have PIR sensors (BLE)...
0
votes
0answers
60 views
Which Pressure sensor in Netatmo weather station
I have been trying to figure out which barometric sensor that is being used in the Netatmo weather stations (netatmo.com/weather) to measure the atmospheric pressure. I have disassembled the indoor ...
2
votes
0answers
32 views
Intrusion alert system for rugged environments iot, sensors [closed]
We are developing an IoT based intrusion alert system for the agricultural field.
The plan is to have vibration sensors installed over the fence on the periphery of agricultural land
Required ...
1
vote
0answers
45 views
Suggestions for vehicle sensors for parking lots [closed]
I am looking for wireless vehicle sensors that could be laid out on the ground to detect if a parking spot is occupied or not.
I am looking for sensors that can integrate with any of the IoT backends ...
1
vote
1answer
54 views
Remote sensor cloud connection
i'm just starting out in Arduino, IoT etc; I was given the Elgoo Uno R3 Arduino starter kit at the weekend and i've been trying to soak it up.
I would like to make a number of sensors for my van, ...
2
votes
1answer
39 views
Is Google home an IoT Device or a WSN base station?
They say Google home is an IoT device but it has the ability to control other devices like lights, Air conditioners, etc. (in smart homes) which is more like a base station in the Wireless sensor ...
2
votes
3answers
795 views
Send sensor data over internet to a server [closed]
I had a project planned on monitoring sensors. I wanted to read sensor data
over the internet. How should I proceed with the setup?
Any help is appreciated.
3
votes
1answer
137 views
Cannot connect SensorTag cc2650 to IBM watson IoT platform using their android app
I have SensorTag cc2650 from Texas Instruments with their android app installed in my Phone. I am getting an exception while connecting IBM Watson IoT. It worked fine with quick-start service but ...
4
votes
1answer
40 views
Are immersion sensors typically waterproof?
This may sound dumb, but are flood sensors, like the one from Xiaomi typically completely waterproof?
And if they are, would they work if installed vertically, facing with the side downwards, instead ...
2
votes
0answers
107 views
Open-Source Repositories that use IoT Sensor Data for Smart Contracts and Blockchain
In all honesty, I have only been reading blogs and papers about how IoT enabled Sensor data can be used with Blockchain along side with Smart Contracts for smart-industries, healthcare etc. but for a ...
3
votes
2answers
2k views
Custom sensor readings with Amazon Alexa
TLDR:
I want to query Alexa for the current humidity sensor reading by asking:
"What is the current humidity, Alexa?"
The answer should be similar to:
"The current humidity level is 56.7%"
...
4
votes
1answer
50 views
For my “switch on light with clap project ” will sound sensors detect other sounds other than a clap and switch on the light?
I am just a high school student who is trying to self-learn for my IoT home automation projects.Please excuse me if this question sound silly to you.This time I am working on this "clap to switch on ...
2
votes
1answer
94 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 ...
1
vote
0answers
59 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 ...
0
votes
0answers
76 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 ...
2
votes
1answer
668 views
Dumb sensor vs smart sensor
Everytime when i read about the "Internet of Things" it is suggested that devices are smart but when it comes to an implementation of an IoT ecosystem, it is not so clear to me anymore. So i need some ...
8
votes
1answer
81 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 ...
11
votes
2answers
279 views
Is it possible to use a CO2 sensor to detect how many people are in a room?
I have MH-Z14 Carbon Dioxide sensor and have been using it to try and detect when a room may need some fresh air. But, I've also noticed that the sensor reading drastically increases when a human is ...
8
votes
3answers
111 views
Sensors under increased pressure
I am wondering how the DHT 22 (measures humidity and temperature) sensor would work under double or triple atmospheric pressure (rough calculations have been done but it will vary and the exact ...
1
vote
1answer
67 views
Would there be an IoT use cases where sensor and actuation are at two different locations [closed]
I am thinking of application that if there is fire or machine failure at remote location, then some action (like an alarm or emergency light) is taken at a different location. (Like a control or ...
