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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1answer
27 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 ...
2
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0answers
16 views

How to find a specific BBC debate or podcast using Alexa and TuneIn?

Kinda silly, but looking at: This show will be available later. Please come back then. https://tunein.com/radio/Intelligence-Squared-Debate-p510948/ Is there a podcast for the BBC debates ...
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1answer
30 views

When stream security camera on TV using Google Home speaker, does the stream go through Google home?

How does Google home manage the connection to stream security camera video to a smart TV? Does Google home work as a proxy when the camera is streaming the video, or somehow it command (How?) TV to ...
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0answers
20 views

eSIM - technology issue?

Let's consider a SmartWatch which has eSIM inside. If the carrier is not supporting it, is there a chance that I can activate it? Details: the SmartWatch in question is a Samsung one. My carrier is ...
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1answer
34 views

What are the advantages of NRF24L01 when compared to LORA module

i am designing an Iot project. In that project i want to transfer small bytes of information from one place to another place which is located more than 2kms away from previous location. therefore ...
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0answers
29 views

Please ensure your device has a proper internet connection

I have been using the 1st. Gen Kevo for almost 3 years now and was working perfect until last week that stop working with all of our phones (1 iOS and 2 Android) I tried to reset the lock and from ...
6
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1answer
60 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
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0answers
110 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 ...
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0answers
29 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
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0answers
47 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
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0answers
83 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
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1answer
48 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 ...
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0answers
70 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 ...
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0answers
35 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(...
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1answer
48 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, ...
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1answer
35 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 ...
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3answers
459 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.
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0answers
70 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 ...
5
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1answer
147 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
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1answer
117 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 ...
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1answer
117 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
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1answer
72 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
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0answers
72 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
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0answers
42 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
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1answer
173 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
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1answer
102 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
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1answer
1k 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 ...
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0answers
353 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
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1answer
651 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
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1answer
185 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
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2answers
535 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
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1answer
113 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
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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
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0answers
126 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
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1answer
776 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
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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 ...
14
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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
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1answer
902 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
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1answer
450 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
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2answers
477 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
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2answers
256 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
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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
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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
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1answer
568 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
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1answer
120 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
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0answers
290 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
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2answers
228 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
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2answers
19k 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
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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
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1answer
518 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. ...