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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Calibrating MPU6050 sensor
So I'm using an MPU6050 module for detecting the impacts on a board to which it is attached, in-order to detect hits on the board, using the accelerometer sensors. The module is placed vertically(z-...
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Sending data to server every second with http-request
I'm sending few bytes of sensor data to server with http.POST every minute and it's working. Next I want to send 20 bytes every second with http.POST. I was told server would take that as an attack ...
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How to use DIY keyboard connected to spi (gpio) of single board computer
I want to build a diy keyboard which connect to the spi interface of the gpio header of the orange pi 5 (ubuntu/linux).
So far I have some sketches of the keyboard, the schematic is in progress.
The ...
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45
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Sniffing a LIN Network in LAB
I am posed with a situation where I have a LIN sensor but without any documentation or literature on the same. I am new to LIN protocol and understand that it is a request and response protocol. Now I ...
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Aeotec Trisensor undefined behavior
I've been using a few of the device of the same model for several months. While they've been working great, one of them recently started showing strange behavior that I cannot find defined in the user ...
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UDP communication with XBee Wi-Fi S6B
I am an absolute newbie when coming to using these modules. I am trying to setup a basic UDP connection between my XBee S6B (UDP Client) to my computer (UDP Server). I have added my codes below. The ...
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Sending sensor's binary signal to the cloud through a wireless settings
I’m relatively new to iot and I'm looking for ways to send a binary signal from a tiny sensor (size of a coin) to the cloud through a wireless setting.
Basically, sensors would emit a simple binary ...
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How to count people in a given area without using phone traffic data?
DESCRIPTION: I am working on a project to find out how many people are in a given region. Basically I want to make a heatmap showing how people move in a specific day throughout 24h. In order to do so,...
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Detect bad air quality because of burned firewood
In my neighbourhood people burn a lot of firewood. I always deactivate my automatic ventilation when I smell it, but I would like to have something better.
Are there sensors to detect this?
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How to create Alexa behavior on Echo Dot that is an alarm sound (or text-to-speech) that continues until dismissed
I bought a YoLink water sensor (leak detector).
By following these steps, I was able to link it to my Alexa app and Echo Dot. Now, when water touches the sensor, Alexa sends a notification to my phone ...
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Which output should be preferred - RS485 OR 4-20ma OR 0-5V OR 0-10V?
I am building a Duct Air velocity monitoring system.
The sensor has these four different output types -
RS485
4-20ma
0-5V
0-10V
I studied about RS 485 and I think the standard was used for Long ...
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Sensor suggestions for accurate drone speed testing
I'm trying to build a system that would allow me to monitor a moving object in real time, to estimate its average speed over a fixed distance. The issue is that the object is a drone, it can't be ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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" ...
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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 ...
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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 ...
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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 ...
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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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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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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 ...
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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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78
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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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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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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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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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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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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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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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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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141
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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-...
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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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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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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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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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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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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 ...
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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 ...
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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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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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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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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 ...
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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 ...
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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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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 ...
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