Questions tagged [communication]
For questions relating to protocol-independent communication methods between user and machine as well as between machines within the IoT ecosystem.
62
questions
5
votes
1answer
33 views
PZEM-004 cheaper alternatives
I am an programmer, trying to monitor consumption remotely, I need some form of communication via cable to transmit (even if I trasmit it WIFi later), PZEM-004 for me is very expensive, and I don't ...
3
votes
0answers
47 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 ...
1
vote
0answers
17 views
Receiving Data from MacBAT 5 in python
I need to be able to communicate with a PLUM-EVC, MacBat 5 from a remote server using Python. I have been given parameters, IP and Port which are required to get the data from EVC.
I am completely ...
2
votes
0answers
43 views
MQTT implementation recommendation for an IoT device
I have used HTTP/s based REST API for IoT application and it works well but consumes more data bandwidth and power. Also, the server resources consumed are too high for the long polling-based method.
...
2
votes
0answers
82 views
Looking for MQTT broker and client recommendations
Working to make a network of remote sensors using MQTT I'm looking for an implementation of a broker an a matching client.
Requirements
broker to be deployed in a cloud server like EC-2 and client ...
3
votes
1answer
46 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 ...
2
votes
0answers
44 views
Can somebody explain why some pins on Olimex ESP32-EVB cannot be used?
I am in need to configure two UART connections from Olimex ESP32-EVB to a scanner and to a card reader.
I was exploring the GPIO pins that could have helped to establish those connections, but ...
1
vote
0answers
21 views
Is it possible to send data to AMQP server using AT-Command on ESP8266 Wi-Fi module?
I'm currently working on an IoT project which I have an STM32F0 connected to the ESP8266 Wi-Fi module. My goal is to publish data to an AMQP server.
Currently, I'm trying to connect to an AMQP server(...
1
vote
1answer
43 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, ...
0
votes
1answer
34 views
Difference between Network, Communication, and Messaging protocol
My understanding is network protocols are BLE, Wifi, ZIgbee, etc. and messaging protocols are http, mqtt, etc. So my questions are:
Is my understanding so far correct?
Are network and communication ...
1
vote
3answers
261 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
0answers
50 views
How subcarrier affects MCS in NBIoT Uplink communication?
I cannot find it in the newer 3GPP docs. So...
To calculate Transport Block Size we this use:
Note: I TBS = MCS
But I found that if we use only one sub-carrier (single-tone) in NB1 we cannot use ...
4
votes
1answer
131 views
Medical data IoT communication protocol?
We are considering connecting a medical device into a hospital patient system we are developing. We are based in the EU and must adhere to the
EU Regulation on the protection of personal data
...
6
votes
1answer
87 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 ...
1
vote
1answer
89 views
How Smart Home devices communication works
I have a big doubt that I'm not able to solve.
Basically, I want to understand how the smart device that I have in my home communicate with their servers, or better, how their servers can call its ...
3
votes
1answer
53 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,...
5
votes
0answers
67 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 ...
2
votes
0answers
39 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
1answer
151 views
Reverse rpc/device control
Is there a common standard/practice for having an IOT device establish a connection to a command and control server, and then act in a server role (i.e. the C&C sends requests to the device and ...
4
votes
1answer
94 views
Standard message structure for communication in HTTP
My question might be a little strange but I can't find any answer to it.
I'm designing a simple IoT system that has some devices as a client and a server that controls these clients like reading ...
3
votes
1answer
870 views
Can I use MatLab code in esp32?
We've some method to run the MatLab code in esp8266 microcontroller. We can manipulate Arduino pins using Simulink in MatLab.
Can we do the same with an esp32 microcontroller as their code can be ...
1
vote
0answers
284 views
GPS/GSM Tracker not sending location [closed]
I bought GPS/GSM Tracker from eBay but it doesn't work and i can't get Location
Steps I followed:
I bought a new sim card with calls and data (checked that it working)
I installed an app on my ...
3
votes
1answer
444 views
Distance calculation based on RSSI value
I want to calculate the RSSI value of a Bluetooth module (HC05) and from the derived RSSI value I want to calculate the distance of the surrounding devices. I'm using an Arduino Uno r3 as a controller ...
4
votes
1answer
151 views
Remote com (serial) connection through cellular IoT
We need to be able to make a com (serial) connection remotely off site from PLC type device.
We have completed a POC for sending some signals to Azure IoT utilizing a Siemens IoT2020 running linux ...
5
votes
2answers
442 views
What is the library to be used to implement CoAP in ESP8266?
I am using Arduino IDE to program my ESP8266. I would like to send data from one ESP8266 module to other. So I would like to use CoAP for this communication. Is there any standard or good library to ...
6
votes
1answer
103 views
Could not ping ESP8266 Wifi module connected to an Arduino
I have been working with a water flow counter which sends data over wifi. I'm using an ESP8266 wifi module. Everything is correctly connected and I've gotten to the point where it's correctly ...
2
votes
0answers
59 views
Stream video on display from server using NanoPi [closed]
I am working on a project where I am required to stream some videos hosted at the server onto a display connected to my NanoPi M1 plus via a HDMI cable. I have not a lot of knowledge about it. Which ...
3
votes
0answers
115 views
Alternatives to Siemens Tc65 (GSM modem) as a terminal to process text messages
I'm working on a solution to solve an existing inconvenience. Some "smart" containers send an alarm via text message when they're full. The number it sends to is a personal phone number from a worker ...
3
votes
1answer
553 views
What IR codes are emitted by Faber/AEG/Franke/Smeg… RC?
What infra-red codes are emitted by the depicted* remote control used by many hood manufactures (Faber/Mepamsa, AEG, Franke, Smeg, Airlux...)?
Identifying the manufacturer of the remote control / IR ...
7
votes
1answer
1k views
Are there standardized MQTT topics?
I am new to MQTT (and home automation in general, I am much more in the systems and dev side), flashed a WiFi switch (Sonoff Basic), connected it to an instance of Mosquitto and Home Assistant and so ...
12
votes
2answers
2k views
How can a device get the SSID and Password of my Network without WPS?
I'm studying ways to make an IoT device access an user´s wifi network.
I know about the WPS way, where the device 'broadcast' a signal and the router, after being commanded to listen, 'receive' it and ...
9
votes
1answer
760 views
Is there any way to access local server from outside without port forwarding? [duplicate]
Situation
I need to access an ESP8266's Wi-Fi local server from outside.
Like Xiaomi Yeelight (YeeLight Introduction Web Site Link) or LOHAS LED
(LOHAS LED Web Site), I have to control it from ...
6
votes
1answer
421 views
SSH into an Orange Pi connected to the internet via 2G GSM module
I wanted to SSH into my Orange Pi remotely. It will be connected to the Internet via a 2G GSM module. How should I go about it? Usually it's ssh username@ip address. The setup isn't implemented yet so ...
9
votes
2answers
421 views
How do car insurance tracking devices connect to the internet?
There are these devices that you can plug into your car and the insurance company can get real time data to "lower" your insurance cost.
Image from U.S.News, 2016.
How do they connect to the ...
2
votes
2answers
253 views
IoT Communication Protocols [closed]
I am trying to see the big picture of IoT Communication Protocols.
For now, I am not interested in lower levels of communications such as WiFi, ZigBee, Bluetooth etc. I wanna see the possible ...
10
votes
1answer
1k views
Non-IP device Communication Protocols
I have a question about Non-IP device communication.
From my research, I learnt CoAP and DDS can be used for Device-to-Device communication.
MQTT is useful for Device-to-Gateway or Device-to-Service ...
3
votes
1answer
75 views
Generating a simple, low cost contactless pulse generator [closed]
I need to allow two devices to communicate by generating a set of pulses (in the range of 100 to 1K HZ) in one device to be received by another device. The two devices are very near each other (say ...
7
votes
1answer
545 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. ...
9
votes
1answer
103 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
285 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
217 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 ...
17
votes
2answers
16k 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
1k 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
496 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
60 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
172 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
212 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
282 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
880 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
88 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'...
