Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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Subscribing to MQTT birth and will topics? (emqttd)

I am running emqttd (emqtt.io). I would like to monitor clients connecting and disconnecting from a separate process that would be subscribing to a system topic where birth and will messages are posted. What is the right way to do that?
Fabien Papleux
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How do I train my Amazon Echo to understand my voice more accurately?

The problem I have with these voice activated devices is that it doesn't always understand my voice correctly. I'm mostly focused on the Amazon Echo; in this post I am asking: How can I train my Amazon Echo to help it understand my voice more…
Henry WH Hack v3.1.0a
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Would using a Tor wifi router make IoT more secure?

Would using a Tor wifi router make IoT more secure from attacks etcetera? These routers provide a Tor client, and also tunnel all internet traffic through a VPN. This anonymises your internet access since it is not possible for the server to…
John Podesta
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What connectivity protocol did the Carnegie Mellon University's Coke Machine use?

I've been reading over the web about the history of the Internet of Things, and one of the most interesting things I have run across is the Carnegie Mellon University's Coke machine. According to various articles I have read, including this one…
anonymous2
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How to debug a DLNA infrastructure?

I am stuck with a peculiar situation at home, and would appreciate any help. I have: Marantz NR1504 AV receiver, connected via PowerLan and Ethernet to the router/modem. Samsung SmartTV, connected via WiFi to the same router. Android smartphones,…
texnic
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Cryptographic algorithms for PIC16 microcontrollers

I'm planning to implement my own home automation system. In will contain the central Raspberry PI server and a number of sensors and switches based on 8-bit PIC16 microcontrollers which are communicating to the central Raspberry PI over the radio…
Boris Brodski
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How can I use 2FA in an MQTT network?

How can I use 2FA (two factor authentication) when I connect a new device to the broker, if it is even possible? Because it seems easier, the second factor can be a software solution first but I would welcome ideas on how to introduce hard tokens…
Bence Kaulics
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How to connect "io-homecontrol" skylights to a Raspberry Pi?

Scenario I want to control my remote controllable skylights with my Raspberry Pi. The windows were installed a few years back and come already with the remote capable io-homecontrol technology, which comes with remotes that can each control one…
Helmar
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Can I use Xiaomi ZigBee devices with SmartThings or other hubs?

At this moment I observed that the least expensive ZigBee devices are the ones sold by Xiaomi, but I don't want to use their own hub because I am pretty sure that Chinese language will be all over the place. Instead I am considering buying devices…
sorin
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Is it possible to use a CO2 sensor to detect how many people are in a room?

I have MH-Z14 Carbon Dioxide sensor and have been using it to try and detect when a room may need some fresh air. But, I've also noticed that the sensor reading drastically increases when a human is present in a room and especially if close to the…
alecxe
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mosquitto_sub "connection refused" on Arch Linux

So I installed mosquitto and mosquitto-client on a Raspberry Pi running Raspbian Jessie through apt-get as well as mosquitto on another Pi running Arch Linux through pacman. On Arch the client utils do not need to be installed separately. Testing…
Ghanima
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Is it possible to run and train a neural network on an 8-bit microcontroller?

I've recently read about neural networks in constrained environments (in particular, A Neural Network Implementation on an Inexpensive Eight Bit Microcontroller) and their applications to IoT devices (e.g. regression for predicting things based on…
Aurora0001
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Running Philips Hue Entertainment with 3rd-party lightbulbs?

I bought this innr light bulb for my Hue system and it works just fine except for the fact that it isn't compatible with Hue Entertainment. As it turns out, no 3rd-party light bulbs are supported by Hue Entertainment (yet). So I tried the…
fûX
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Wiring regulations for self made electrical equipment (UK)

There are various intrusive wiring regulations in the UK. If I want to wire up a light extension I'm required to have this done by a suitably qualified person, or if I do it myself get it approved by a suitably qualified person. Of course I'm sure…
jcoder
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DIY Add a Sonoff To Home Thermostat

I am not an electrical engineer, just an enthusiastic DIY home owner. I would like my A/C to self turn on at 8pm, that is before I get home and have the ability to cut off power automatically. I have Sonoff basic devices doing this with my lawn…
user9232
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