Questions tagged [wireless]
For questions about non-wired communication in IoT devices, particularly where you do not have a specific protocol or transport in mind.
72
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3
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Safety of a smart switch on a fireplace
Would it be unsafe or considered "bad practice" to replace a gas fireplace switch with an IoT enabled smart switch?
I would like to think there would be no issue, but, I want to make sure that it's ...
- 1,817
17
votes
1
answer
315
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Adding Devices to Samsung SmartThings
I've got the Samsung SmartThings system installed in my house, but I've encountered a few situations where a new device (e.g. an in-wall outlet) couldn't be found through the SmartThings App on my ...
- 1,817
15
votes
4
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Why are Zigbee hardware modules so expensive?
The Zigbee hardware looks quite simple to produce1, why are they so expensive?
For comparison I can get a 855 Mhz wireless module for 2-3€ but I can't find Zigbee modules under 15€.
[1]
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14
votes
2
answers
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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, ...
- 143
12
votes
2
answers
371
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Wireless communication technologies for indoor location-tracking
I need to develop a solution for determining whether an object/tag exists within a defined perimeter. The perimeter would be located indoors so GPS isn't an option. It would be an approx 10 metres x ...
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11
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3
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Difference Between ZigBee and Z-Wave?
I've have installed Z-Wave switches and outlets in a few places around my house. However, I noticed when purchasing the devices that there were a couple of different wireless options available in the ...
- 1,817
11
votes
2
answers
2k
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Power consumption of ANT/ANT+ compared to other wireless sensor network technologies
ANT/ANT+ is a proprietary but open access multicast wireless sensor network technology. It's data rate and the resulting application throughput of 20 to 60 kBit/s is significantly reduced compared to ...
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10
votes
1
answer
165
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Sensors Communicating With the Pi, BLE / Wifi
I want to place a Pi 3 somewhere in my house and battery powered sensors. The Pi will read the inputs from e.g. the same level, one level above and the garden. So 1-2 regular brick walls in between ...
Andi Giga
9
votes
4
answers
340
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Which protocol should I use for automation devices in a home environment?
I have a project to automate things in a house.
I am a developer but a beginner in electronics and IoT.
What should I use to communicate wirelessly? Wi-Fi, Bluetooth... Where should I look?
I need a ...
- 103
8
votes
3
answers
952
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IoT device (siren) with RESTful APIs
I am fairly new to the IoT world, so I need help designing a system.
Scenario:
I have an application that sends messages to a Service Bus/ Message Queue in Azure. The messages can be classified into ...
- 81
8
votes
2
answers
306
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Suitable wireless technologies for high density industrial IoT
I have a requirement to design M2M communication devices for a factory which has 1000 nodes (machines) within 100m of each other. The devices will be wired to get power and will transmit a payload of ...
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8
votes
2
answers
486
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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 ...
- 539
8
votes
2
answers
3k
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Creating an HTTP GET polling service on a Raspberry Pi Client
I have the following hardware:
3 x Particle Photons. Each serve as an HTTP Server
1 x Raspberry Pi 3 which will serve as an HTTP Client
Upon requesting an HTTP GET to any of the the Photons, the ...
- 1,458
8
votes
1
answer
512
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Optimal Wireless Technology for High Data Rate & Low Latency IoT Application
I am planning to use the BNO055 Absolute Orientation Sensor for collecting the accelerometer, magnetometer and gyroscopic measurements for an application. As of now I want the data to be sent at a ...
- 1,458
8
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1
answer
1k
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How to Use Alexa & Raspberry Pi switch things wirelessly?
I wanted to use my Amazon Echo Dot to connect to my Raspberry Pi, and have it turn on switches wirelessly.
What I have done: I have been able to use Makermusings's Fauxmo and a relay board to "trick"...
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8
votes
1
answer
486
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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 ...
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8
votes
1
answer
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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 ...
- 81
8
votes
2
answers
112
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Requirement for a mesh network using Zigbee or similar technology
I have a requirement to design a proprietary monitoring system. (There's some intellectual property involved so I'll describe the system with a slightly altered purpose.) Imagine a large factory ...
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7
votes
2
answers
419
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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 ...
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7
votes
2
answers
441
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IoT 2G wireless data - service providers options in USA
What are the service providers options in USA for IoT 2G data?
Project scenario:
raspberry pi 3 devices that will be collecting data in remote areas
I would buy modem modules compatible with the ...
- 179
7
votes
1
answer
711
views
How do I check whether a LTE network supports CAT M1?
LTE CAT M1 is a low power communication channel for LTE networks designed for IoT use. How do I check whether a network supports it or not?
Carriers' help desk does not know anything about CAT M1. ...
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7
votes
1
answer
452
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Which off-the-shelf wireless door/window sensor can I easily interface with Home Assistant?
I am thinking of setting up my own home security system using Home Assistant. For motion sensors I'm going to build Wi-Fi MQTT transmitters using the WeMos board.
But for door sensors I want ...
- 443
6
votes
2
answers
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Why arp -a does not show all devices connected to WIFI? [closed]
I am trying to see the IPs of all the devices connected to my WIFI. Everyone suggests to use the command arp -a in the terminal but when I do so I get always the same list of devices. I try to connect ...
- 185
6
votes
2
answers
95
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Which Wireless Frequency Bands could be preferrable for IoT in Aviation?
This question comes in lieu because everytime you board a plane the crew announces that the passengers turn their phones off or use flight mode.
The core reason for this is the wireless adapters in a ...
- 1,458
6
votes
1
answer
903
views
How does APN affect cellular connectivity?
We had recently deployed a few Cellular IoT devices on the field, using SIMs from a certain provider (Airtel India). They had provided us with an APN, but we chose not to program our device with the ...
- 143
6
votes
1
answer
1k
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Controlling IoT device through a captive portal/web app over Wi-Fi & 4G/LTE simultaneously
Yeah - mostly some mad scientist stuff here.
I have an IoT project I'm working on where each device must be independently connected to each users phone and not connected to any central WiFi network. ...
- 61
6
votes
1
answer
360
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Availability of Narrow band IoT modules or chipsets
The Narrow-Band IoT radio protocol seems to have been around for a few years, but I'm struggling to identify any manufacturers of devices that are actually available to buy (either from traditional ...
6
votes
1
answer
159
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Send wirelessly very small amount of data
I need to transfer wirelessly a message of maximum 5 bytes of data (including everything such as start bits, stop bits etc etc).
What I tried:
Empty Ethernet package is at least 56 bytes according to ...
- 161
6
votes
1
answer
112
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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 ...
- 161
6
votes
1
answer
487
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LTE-M, Cat-M1, maybe MQTT - How is data metered? TCP/IP overhead included?
We're looking at adding an option to our product for Cat-M1 data connectivity. The data plans look interesting, but it's very unclear how the data is actually counted. For example... for these AT&...
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5
votes
1
answer
65
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Secure pairing support in various RF standards
I would like to understand if secure pairing can be implemented in all (or none?) IoT RF standards.
For example: BLE provides Out-of-band possibility, which seems like only really secure option to ...
5
votes
0
answers
360
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Creating COM serial port between external device (Joule/Arduino/etc.) and PC over Bluetooth w/ linux sdptool & rfcomm (OR another method)
This article is not device specific, but rather is focused on using sdptool and rfcomm to setup a serial com port connection over bluetooth. If you have another method instead of these two Linux ...
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4
votes
2
answers
139
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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 ...
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4
votes
2
answers
72
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WLAN Hotspot Internet sharing possibilities?
I figure this is the best place to ask.
Many IOT devices need to be connected to a network, and sometimes require Internet access, but not 100% of the time.
Usually it's fine to just connect them to ...
4
votes
1
answer
153
views
Standalone NFC/RFID with WiFi/ethernet network connection
I spent many hours looking for a device for my iot project. So far, everything I find does not meet my expectations. I prepared two prototypes - one based on rpi zero and one based on esp32, but I ...
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4
votes
1
answer
355
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Fs1000a generic cheap RF transmitter compatibility with Hc12 receiver?
I have build a door sensor where Arduino uno reads reed switch and transmits RF 433MHz signal to other Arduino uno connected RF receiver. I am using rcswitch library and cheap ask/ook transmitter/ ...
4
votes
0
answers
318
views
MOXA Modbus with Raspberry Pi – Can't get slave to work
I have two Moxa modbuses that I have daisy-chained together, and then connected to my network's ethernet port. The modbuses are hooked up to a control board with LED lights for the coils and buttons ...
- 253
4
votes
0
answers
92
views
Remote control old intercom
My brother has a motor disability and lives in my parents house. He uses an wheelchair and operating the intercom is way too difficult for him.
I was thinking to mount an RF relay switch, but ...
- 141
3
votes
2
answers
73
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IoT applications with heavy-load wireless communications
I am very interested in the examples of IoT applications where a heavy-load (for large amounts of data) wireless communications have to be used.
To the best of my knowledge, most IoT devices would ...
- 161
3
votes
1
answer
181
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Is there any surveillance camera that supports UDP broadcast upon motion detection?
I use EventGhost as my IoT hub. The easiest way for me to hook it up with a surveillance cam is UDP broadcast.
So my question:
Is there any surveillance camera that supports UDP broadcast upon motion ...
3
votes
1
answer
354
views
Why there is no LPWAN technology in HF or VHF band?
This is a question which I have been wondering ever since I started exploring LPWAN technologies.
All the LPWAN technologies I have found (like SigFox, LoRa, Ingenu etc.) work in UHF band (300 - 3,...
- 143
3
votes
1
answer
58
views
Wireless IoT Devices at mm-wave frequencies
The upcoming 5G can be beneficial for IoT in various aspects:
higher data-rates
low latency
better utilization of bandwidth
potential wireless power transfer/harvest
Introduction of mm-waves (28 GHz ...
- 161
3
votes
2
answers
211
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Is there a wireless video doorbell that will chime on Google Nest speaker?
Most smart doorbells (e.g. Google Nest Hello doorbell) seem to require a wired connection. The Ring wireless doorbell looks like the most popular but compatibility with Google Assistant looks poor. I ...
- 130
3
votes
0
answers
411
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Using RPC in IoT environments
I would like to use RPC for communication between fog nodes. As the connection between the nodes is wireless (802.15.4), I don't want to use an RPC framework that uses HTTP (like gRPC).
I know that ...
- 31
2
votes
1
answer
77
views
How to differentiate the side of a door?
I would like to design a lock which will automatically open once someone is on a specific side of a door ("outside").
There are easy (software) and complicated (hardware) elements to take into ...
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2
votes
1
answer
603
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Sonoff basic R3 DIY
I have read through a few blogs and watched videos of setting up the R3. What I have accomplished to date is the following:
Paired the R3 with ewelink cell app. I can turn it on and off from the app.
...
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2
votes
1
answer
376
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Wirelessly Transmit Signal to Smartphone App
I'm looking for a way to wirelessly transmit data to smartphone app. I have a small temperature sensor which will be embedded into a metal structure and will constantly monitor temperature when the ...
2
votes
1
answer
61
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RFID Specifications and Project Recommendations [closed]
I'm very new (one day) to the IoT world. I've got a specific project I want to tackle, as a intro to IoT, but I'm also open to general advice on getting started. In summary, I want to know if my ...
- 129
2
votes
0
answers
821
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How to take data from multiple BLE devices into a central device simultaneously?
Firstly, I am very beginner in BLE domain. I have very little knowledge about it.
I have Adafruit Feather 32u4 Bluefruit LE module.
I want to do a project where multiple BLE peripheral devices ...
- 121
2
votes
0
answers
38
views
Industrial programmable radio transceiver
(I hope this kind of questions are tolerated here. Otherwise, please say it in the comment and I will delete the question)
I have to create a wireless network of over 200 devices, placed in the same ...
- 635