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.

Filter by
Sorted by
Tagged with
0 votes
0 answers
13 views

Leaksmart water flow meter with water valve Item #: 8853001 and Item #8852400 compatible with Aeotec Hub i.e SmartThings

I want to install a Leaksmart water flow meter with a shut-off valve Item #: 8853300 and I have Aeotec Hub(i.e SmartThings). Before I purchase that product I want to know that this item can work with ...
user avatar
0 votes
0 answers
24 views

Recommendation and compatibility of Smart sprinkler controller and smart soil moisture sensor with Aeotec Hub(i.e SmartThings)

Scenario: Smart soil moisture sensor and Smart sprinkler controller will be connected to the Aeotec Hub. When the soil moisture sensor detects less moisture it will automatically start sprinklers ...
user avatar
2 votes
0 answers
23 views

How to account for variation in sensors across multiple devices?

I am working on installing 5 sensors around a workshop to measure the mass of different storage boxes. I wish to use the same codebase to record and log all the data from each sensor setup. One issue ...
user avatar
  • 21
1 vote
1 answer
48 views

How to wire multiple DS18B20 temperature sensors?

I want to wire up a few DS18B20 sensors to measure various points across a span of about 10 meters. (I intend to hook this up to an ESP8266 and use Tasmota, but I think that's not really relevant to ...
user avatar
  • 133
1 vote
0 answers
34 views

Combining the detection of smoke+motion+temperature+light in a single wired device

I'm working on a prototype home automation for our to-be renovated off-grid farmhouse. Much of the house will run directly on 24V DC (except the power devices like microwave etc).The whole setup will ...
user avatar
1 vote
1 answer
67 views

Best memory choice for my sensor

I'm a software developer and trodding in murky waters here so please do forgive my lack of knowledge. I've been developing a sensor with the nRF9160DK and some accelerometers. I need to continuously ...
user avatar
2 votes
1 answer
65 views

Does iPhone 11 device contain multiple UWB receivers?

Does iPhone 11 device contain multiple UWB receivers? Angle of Arrival (AoA) is often required for many applications for UWB enabled devices. I wonder if modern UWB enabled devices i.e. iPhone 11 ...
user avatar
0 votes
2 answers
89 views

How to detect the relative direction of two mobile devices?

How to detect the relative direction of two mobile devices? When a mobile device (i.e. a modern smartphone) is taken near to a second mobile device, it is possible to detect inter-device proximity ...
user avatar
0 votes
0 answers
46 views

Is there a device to detect roof leaks?

I just had my roof redone and solar panels installed on the roof. As we're getting into the rainy season I've been concerned about the potential for leaks in my roof with all the new hardware. Is ...
user avatar
  • 1,807
1 vote
0 answers
34 views

Electric Gate Project further development

Newbie here, hoping to extend my control of electric gate system. Here is where I am at, and will then go on to explain where I want this to get to. My gate system is an old "out of the box" ...
user avatar
0 votes
0 answers
120 views

Temperature sensor MLX90614 read object temperature above 300°C

I want to make sure the sensor read normally but when i run it to read the object temperature, the result is 382.19°C. I have search for tutorials, and also the error but i couldn't find it except for ...
user avatar
0 votes
1 answer
51 views

Battery powered MCU with accelerometers and LTE-COMS, looking for products

I've made a question previously but I did not give enough background info so here it goes: I have been developing a prototype for measuring ground vibrations using three MEMS-accelerometers together ...
user avatar
-1 votes
2 answers
42 views

Guide to connecting generic peripherals

I have some development boards like the FiPy with Expansion Board, mainly to experiment with programming on the processor, but it would be interesting to connect some peripherals (by wire, not ...
user avatar
1 vote
1 answer
35 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 ...
user avatar
1 vote
1 answer
106 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 ...
user avatar
3 votes
0 answers
30 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 ...
user avatar
  • 131
2 votes
0 answers
76 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 ...
user avatar
0 votes
0 answers
74 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 ...
user avatar
  • 101
3 votes
1 answer
50 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 ...
user avatar
  • 131
0 votes
0 answers
32 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 ...
user avatar
  • 111
1 vote
2 answers
82 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 ...
user avatar
  • 21
0 votes
1 answer
60 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 ...
user avatar
  • 153
3 votes
1 answer
74 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 ...
user avatar
1 vote
1 answer
48 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 ...
user avatar
2 votes
1 answer
57 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 ...
user avatar
3 votes
1 answer
220 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 ...
user avatar
0 votes
0 answers
64 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-...
user avatar
1 vote
1 answer
50 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 ? ...
user avatar
  • 11
4 votes
2 answers
93 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 ...
user avatar
1 vote
0 answers
52 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 (...
user avatar
  • 111
3 votes
0 answers
32 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 ...
user avatar
  • 131
1 vote
0 answers
38 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 ...
user avatar
1 vote
1 answer
44 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 ...
user avatar
  • 11
0 votes
0 answers
48 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 ...
user avatar
3 votes
2 answers
333 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 ...
user avatar
  • 133
2 votes
0 answers
40 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 ...
user avatar
  • 121
4 votes
2 answers
79 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). ...
user avatar
  • 141
1 vote
0 answers
41 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 ...
user avatar
5 votes
1 answer
230 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 ...
user avatar
2 votes
2 answers
84 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 ...
user avatar
0 votes
1 answer
50 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 ...
user avatar
-1 votes
1 answer
52 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.
user avatar
2 votes
1 answer
205 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 ...
user avatar
  • 31
1 vote
0 answers
34 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 ...
user avatar
  • 111
2 votes
1 answer
52 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 ...
user avatar
6 votes
2 answers
299 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 ...
user avatar
2 votes
1 answer
65 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. ...
user avatar
  • 21
1 vote
0 answers
50 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 ...
user avatar
0 votes
1 answer
84 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 ...
user avatar
  • 11
1 vote
1 answer
60 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 ...
user avatar