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.

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19
votes
3answers
572 views

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 ...
17
votes
1answer
261 views

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 ...
14
votes
4answers
2k views

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]
13
votes
2answers
575 views

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, ...
12
votes
1answer
292 views

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 ...
10
votes
3answers
2k views

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 ...
10
votes
2answers
2k views

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 ...
10
votes
1answer
148 views

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 ...
9
votes
4answers
305 views

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 ...
8
votes
3answers
775 views

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 ...
8
votes
2answers
259 views

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 ...
8
votes
2answers
330 views

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 ...
8
votes
2answers
2k views

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 API ...
8
votes
1answer
494 views

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 ...
8
votes
1answer
768 views

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"...
8
votes
1answer
453 views

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 ...
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 ...
8
votes
2answers
84 views

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 ...
7
votes
2answers
351 views

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 ...
7
votes
2answers
339 views

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 ...
7
votes
1answer
578 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. ...
7
votes
1answer
392 views

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 ...
6
votes
2answers
80 views

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 ...
6
votes
1answer
220 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 ...
6
votes
1answer
787 views

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. ...
6
votes
1answer
344 views

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
1answer
99 views

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 ...
6
votes
1answer
360 views

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&...
5
votes
1answer
57 views

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
0answers
74 views

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 ...
5
votes
0answers
298 views

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 ...
4
votes
2answers
131 views

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 ...
4
votes
2answers
47 views

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
0answers
155 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 ...
4
votes
0answers
54 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 ...
3
votes
2answers
61 views

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 ...
3
votes
1answer
116 views

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
1answer
78 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,...
3
votes
1answer
49 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 ...
3
votes
1answer
113 views

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/ ...
3
votes
0answers
153 views

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 ...
2
votes
1answer
71 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 ...
2
votes
1answer
37 views

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
1answer
50 views

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 ...
2
votes
0answers
390 views

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 ...
2
votes
0answers
34 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 ...
2
votes
0answers
48 views

Sigfox Callback CustomValue's issue Sending NULL instead of wanted values

I'm working on a project, and I want to use a Sigfox callback to send some data. But when I want separate my payload as I coded it, all my values on Callback are NULL. This is my Callback, and this ...
1
vote
3answers
659 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.
1
vote
1answer
36 views

Problem with UART of Fona 3G from adafruit. (aka SIM5320a)

My issue is fairly simple to describe but I have no idea what the problem could be. So I got my FONA 3G and immediately after taking it out of the box, I connected the battery and I wired up my FTDI ...
1
vote
1answer
52 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, ...