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Questions tagged [iot]

QUESTIONS MUST BE PROGRAMMING RELATED.. Use a more specific tag for your question instead, e.g. [wifi], [bluetooth], [c], [arduino]

The Internet of Things (IoT) is a novel paradigm where many of the objects that surround us will be connected to the Internet, these objects can be Radio-Frequency IDentification (RFID) tags, sensors, actuators, mobile phones, etc. and through unique addressing scheme, are able to interact with each other and cooperate with their neighbors to reach common goals.

While programming questions about Internet of Things are on-topic here, other questions should be asked on the new Internet of Things Stack Exchange site.

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If the question is not programming related then it may be on-topic at Raspberry Pi Stack Exchange, Internet of Things Stack Exchange or Unix & Linux Stack Exchange.

3888 questions
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How many events can socket.io handle?

I was trying Socket.io (server and client) for my personal project. As it is my first try with node.js even javascript and mongodb I am bit confused about performance of my server. I have created a complex real time system with many events and many…
Blind Ninja
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SQLite on Embedded System

I am trying to configure SQLite to run on an embedded system (ARM® Cortex®-M7). I have downloaded the amalgamation from the SQLite website, imported it into the project, and added the following symbols: SQLITE_THREADSAFE=0, SQLITE_OS_OTHER=1,…
Steve
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Save data from Azure HUB-IOT to an Azure SQL-database

I have recently created an Azure Hub-IOT in which I am sending some data from a virtualized device, I know that the data arrived because I can see them from a terminal but now I want to take this data and save them into an Azure SQL_DataBase, how…
Giacomo El Ghisa Zidarich
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How many devices we can connect to bluetooth 5

How many devices can we connect to the Bluetooth 5 and can get info about the total no. of Bluetooth within that signal? Which devices can help to do it.
Aditya Singh
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Can two different MQTT brokers communicate with each other?

I am currently exploring the possibility of using MQTT protocol in my program and the system has found out that there are several different MQTT Brokers. So, my question is that can you mix and match brokers for this communication? For instance,…
ThN
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What prevents LoRaWAN nodes accepting the same JOIN ACCEPT message in OTAA

I surely must have missed something from my reading of the LoRaWAN specifications, because this seems too bad to be true. Please tell me I'm delirious :) The following seems to happen in my testbed when I have many OTAA nodes and I can't figure out…
BjornW
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IoT device with CoAP and NAT Traversal

Context: Each customer can have 100-1000 IoT-devices behind NAT. We have multiple customers. The aim is to manage these devices from outside. Devices use CoAP protocol, which uses by default udp. There are few constraints. It is not possible to…
Sukar Lofer
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NMCLI device unavailable

I am trying to configure a new unit with a cellular interface on ubuntu core 16.04. I have NMCLI package running on it. Before I added my connection I checked the Interfaces # nmcli dev DEVICE TYPE STATE CONNECTION eth1 …
Bart
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how to add Paho-MQTT to android studio

I am trying to use Paho-MQTT in android studio. I referred to this link and I should add the following to gradle files the link demands adding the following: repositories { maven { url…
Amrmsmb
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What is the difference between aws IoT 'device' and 'thingShadow' classes?

I have an app that subscribes and publishes to topics on aws IoT. I am wondering what the difference between the two classes "device" and "thingShadow" are. This library gives examples of both and they both seem to have similar functionalities.
user7120881
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ESP8266 12E NodeMCU 1.0 pin mapping for micro sd card?

I tried several pin conifguration to connect nodemcu and micro sd card. However, I had not any luck to successfully connect to sd card. I followed esp8266 forum and some other solution! I need your suggestions :)
Naim Rajiv
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Does IOT hardware for apple review should be complient with FCC?

I've made an app that connects to BLE device (my device based on module HM-10C with FCC). My app was rejected from appstore review process with remark about hardware needed. I'm ready to send hardware but in apple response also written about…
Dmitry
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MQTT error after 5 minutes

I have a React-native app that I need to connect with IoT (AWS), with websockets. I currently use the package react-native-paho-mqtt to connect my app. Here is my code : function getClient(onConnect, onConnectionFailed, onConnectionLost, …
Antoine Grandchamp
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Android Studio - MQTT not connecting

I have just started learning using MQTT protocol with Android Studio. Using mosquitto broker, I am able to exchange messages between pub/sub windows. But when I send message to broker through android studio, the app builds successfully but nothing…
Noor
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How to download android things OS source code?

I could find git repository/branch for Brillio but no separate for Android things. Is it that it is not open source yet or released for public ?
Anirudh
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