Internet of Things Stack Exchange
Internet of Things Stack Exchange

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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 the Internet of Things, making it possible for…
Aurora0001
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Do Matter over Thread IoT devices have WAN access?

This is a seemingly simple question. But I can't find an answer. Suppose I have a smart switch or light bulb, or similar Matter/Thread IoT device in my home. Can that device talk to the internet? Let's start with what I think I know: The Thread…
richb
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How to use the onboard LED on the ESP32-C3-DevKitC-02

I just bought an ESP32-C3-DevKitC-02 from Espressif, which features an onboard color LED. I'm a bit of a newbie in this space, so I thought I'd start by trying to get a simple "blink" program running. I've installed the Espressif VSCode…
Denise Draper
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Create Google voice command without IFTTT

Problem I'm trying to extend my own application to use the Google Assistant (in my situation Google Nest Hub device) and is able to control my home custom-made devices like turn on/off light, lock door, feed cat, etc. I'm not using any common…
Lukas
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Looking for thermostat with web interface, MQTT capability, not dependant on cell phone apps

Does anyone make a thermostat with (ideally wired ethernet) or Wi-Fi network connectivity where the device has a web GUI interface that can be accessed and programmed with a browser (i.e. not dependent on cell-phone app) and will interface with…
Peggy Schafer
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Count or list active client connections to mosquitto server

I just want to know how many clients are actively connected to my mosquitto server. Or even better, get a list of client ids connected to my mosquitto server. I read some documentation suggesting the topic $SYS/broker/clients/connected will give…
learningtech
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Do I need different certificates for every thing?

I'm learning AWS and I created a new thing with the required certificates to access it via MQTT: root-CA.crt .private.key .cert.pem If I'm not wrong the root-CA.crt file will be the same for all the things because it's used to authenticate the…
Mark
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Can you intercept outgoing messages from devices on your LAN?

Many IoT systems have 3rd-party APIs people have reverse-engineered so they can add custom integrations, but these all work by impersonating the app, receiving updates from the server. If I'm on my local network and so is my smart-plug or door-bell…
Mr. Boy
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Does openHAB support the Google Assistant?

I've been considering using openHAB recently as my home automation system, but I'd like to connect a Google Home to it so I can control the system with my voice. It looks like openHAB support Amazon Alexa through the openhab-alexa skill, so with an…
Aurora0001
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Connect an esp32 with AWS MQTT with SIM800L

I am are trying to use a sim800L module to connect an esp32 running Arduino to AWS MQTT. I need to connect and publish and subscribe to topics. I am doing this successfully via WiFi. Not via the sim800L GSM module. I cannot find any example code.…
saja wahidee
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Testing security of IoT devices

Searching the archives for "fuzz" and "pentest" only results in 2-3 relevant threads on this topic and they are all from 2016/2017. I would really like to subject my IoT devices (e.g. surveillance cameras) to severe testing to uncover bugs and other…
typo
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Send data from MQTT topic to WebServer

I have many raspberry Pis monitoring temperature and humidity in real time and publishing the data continuously to an MQTT broker (I am using Mosquitto at the moment). The Raspberry pis are all publishing to different topics. I would then like to…
Carlisle Manson
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Do PSM drop TCP/IP session(MQTT) when going sleep?

Any idea if PSM should drop the PDP context and the TCP/IP session information when going sleep? My understanding is PSM should retain all these info, so when wake up, it can seamless connect back to tcp/ip session before it sleep. however, in…
Justin
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MQTT for many-to-one communication

I have an architecture where many sensors (hundreds of them), located in different places (hundreds of kilometers apart), send data to a remote database. Is MQTT suitable for this kind of configurations?. I was thinking in installing the MQTT…
Gaspar S.
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How can I transmit this information from my device using the least data possible?

I have got a Raspberry Pi setup to transmit things over socket from my project. It currently does this over cellular data on a pay as you go plan, so I would like to optimise it. All that needs to transmitted is three numbers, currently in the…
tejt
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