Questions tagged [communication]

For questions relating to protocol-independent communication methods between user and machine as well as between machines within the IoT ecosystem.

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9
votes
1answer
121 views

How can I synchronise data between devices, avoiding loss of messages and duplication?

I have an IoT network of devices sending data to each other, with data being stored in a database. If I have a device sending 10 packets/API requests in sequence, sometimes only a few reach their ...
5
votes
0answers
306 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 ...
6
votes
2answers
242 views

Is it ever a good idea to 'roll your own' protocol for IoT device communication?

I've heard many people mention that their embedded IoT devices aren't powerful enough to process known protocols, like HTTPS or even TLS security for sockets. Instead, they turn to creating their own ...
22
votes
2answers
25k views

What is the difference between MQTT and Web Sockets, and when should I use them?

What are the major differences between MQTT and Web Sockets? When using IoT for home automation - control and monitoring access over different devices, which one of them should be used when Rest API ...
7
votes
2answers
2k views

Raspberry Pi to send sensor's data to server continuously and receive commands from server

I would like to design a system using Raspberry Pi that sends the sensor's data to server continuously and receive commands from server. Will MQTT suit my needs ? Is there any way to do so if I use ...
6
votes
1answer
544 views

How to use telegram api registerDevice for ESP8266?

I can't find any example for this method. I don't want to check the messages via "getMessages" method but want that telegram sends a TCP message to ESP8266, like my mobile or browser receive messages. ...
1
vote
1answer
61 views

In the name of the lineup 4, 5 and 6, for example Bluecore-4, 5,6, is taken from the XAP4, 5,6?

Tell me please, in the name of the lineup 4, 5 and 6, for example Bluecore-4, Bluecore-5, Bluecore-6, is taken from the MCU XAP4, XAP5 and 6 respectively? Suspicious coincidence. Where can you read ...
4
votes
1answer
179 views

Programming of change of keys on full numbering of CSR bluecore chips

Who can tell how you can change the key values for the full numbering of SCR bluecore chips. The built-in function only modifies the user keys from 0 to 49. I tried to change the first digit of the ...
8
votes
2answers
231 views

Trying to switch my lights off in my smart home

My main objective is to make my arduino or create a app on android to control lights in the house. So my home has the Nexwell Tukan and I can control the lights and power outlets and more, it also ...
14
votes
2answers
314 views

What Messaging Type can be used for Cellular Network Oriented IoT Protocols?

This came to my attention recently when I found an amazing video on Youtube by: Micheal E. Anderson: Comparing Messaging Techniques for the IoT, OpenIoTSummit, Linux Foundation. The slides for his ...
13
votes
1answer
1k views

How does an Azure IoT Hub interact with Embedded/IoT devices?

I am working on the Azure IoT platform, and I understand how devices send data to the IoT hub (if I am not wrong, It is just web service call or something similar to that). But I wonder how the IoT ...
5
votes
1answer
97 views

When network provisioning happens through a hotspot (for a headless device), how can I notify the user of a failure when switching to station mode?

When a user connects to the hotspot of a headless device for configuring Wi-Fi credentials for device provisioning and if it fails to connect to Wi-Fi once Wi-Fi credentials are saved, the user doesn'...
2
votes
1answer
700 views

How to start IoT development to send commands from IoT Hub to Device

I'm a .Net developer recently started working on WindowsAzure IoT, but my role is just creating web API's to provide data to client (Mobile App) sent by IoT devices. I want to send commands to ...
6
votes
1answer
625 views

Can a dimmer switch be connected to the IoT?

I'd like to connect a button "dimmer switch" like this one: to the IoT. Maybe there's already such a device, I just could not find any. The underlying idea is to set a "%" information for each of ...
6
votes
1answer
184 views

How can I aggregate QS data from different sources on one and unique dashboard?

I would like to automatically aggregate QS data, biofeedback data and neurofeedback data from different applications into one dashboard. Data is collected from; Gear S2, Withings body scale, Withings ...
14
votes
3answers
871 views

Is Bluetooth 3.0 suitable for a single-master multiple-slave network?

I have a data logger board with a SIM808 on it. It has Bluetooth 3.0 capability by the SIM808. The board itself implements a battery management system, capable of performing weight, humidity and ...
8
votes
2answers
417 views

Does CoAP have a lower footprint than MQTT?

I recently read a Quora question about whether CoAP or MQTT is more lightweight, but the answers don't seem particularly satisfying and all contradict each other: the top answer says MQTT takes fewer ...
5
votes
0answers
172 views

What is the purpose of dotdot in smart home devices?

The ZigBee Alliance recently released dotdot, a new application layer for Internet of Things devices. They also provide a brief description of what dotdot does: dotdot is the universal language of ...
15
votes
3answers
4k views

How can I easily configure Wi-Fi on a smart device without a screen?

I'm making an IoT device that will serve a web app over WiFi which can be accessed to control it. I would like to make it easy to set up. For example, the easiest way I can imagine is as follows; all ...
9
votes
2answers
348 views

Is there a way to preserve the MQTT QoS level until it reaches the client?

MQTT allows senders to set a Quality of Service (QoS) level, which provides certain guarantees about whether a message will be received (and whether duplicates are permitted). This article from HiveMQ ...
10
votes
3answers
605 views

Does XMPP have a large overhead for IoT devices sending short, frequent messages?

I've been reading about XMPP as a potential communications protocol for IoT devices but, after reading one source, I'm unsure whether it's really an appropriate protocol if you're concerned about ...
4
votes
1answer
238 views

How can I monitor IoT devices in real-time while on a plane?

As a frequent traveler (for work and research), currently, a lot of this travel is by plane. While in flight, I have to have my devices (that are with me obviously) in flight mode. This is a standard ...
4
votes
2answers
129 views

How reliable is location tracking of shipments? [closed]

I was reading about the tracking of parcels and other shipments, being a primary example of IoT applications. But I'm wondering about how reliable and precise the positioning would be. I have the ...
24
votes
1answer
678 views

Is CoAP still used for IoT devices?

I did a prototype project for work a few years ago that utilized the Constrained Application Protocol (CoAP) for communicating with an Arduino board over a mesh network, but we put the brakes on the ...

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