Questions tagged [communication]

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

16 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5
votes
1answer
47 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 ...
5
votes
0answers
70 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
287 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 ...
5
votes
0answers
161 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 ...
3
votes
0answers
79 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 ...
3
votes
0answers
120 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 ...
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 ...
2
votes
0answers
57 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 ...
2
votes
0answers
41 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
0answers
28 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 ...
1
vote
0answers
25 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 ...
1
vote
0answers
29 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
0answers
62 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 ...
0
votes
1answer
9 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 ...
0
votes
0answers
18 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 ...