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1500 questions
8
votes
2 answers
Free MQTT brokers
Are there any limitations ( mainly amount of messages) when using free MQTT server ( such as iot.eclipse.org ), that causes from time to time not to publish messages?
I have 2-3 device connected at home, and for testing purposes, publish about 10-20…
guyd
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8
votes
2 answers
Requirement for a mesh network using Zigbee or similar technology
I have a requirement to design a proprietary monitoring system. (There's some intellectual property involved so I'll describe the system with a slightly altered purpose.) Imagine a large factory floor with dozens of devices scattered about…
David
- 181
- 2
8
votes
1 answer
Connecting air conditioner to Apple's HomeKit
I'm planning to connect my air conditioner to Apple's HomeKit app. At first I searched for ways to do it, but I couldn't find a solution that would work for that project.
As I've found, Apple actually released a 'non commercial' protocol…
Rafał M
- 181
- 3
8
votes
1 answer
mosquitto - Broker won't start with persistence configuration
mosquitto does not seem to like the following options for persistence.
# Persistence configuration
persistence true
persistence_location /data/qos/
persistent_client_expiration 8h
The /data/qos does exist and permissions have been set.
sudo chown…
cogitoergosum
- 1,091
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8
votes
2 answers
Can MQTT be used for queuing?
I am building a project which has the following requirements:
My hardware device (NanoPi) should access a broker for a video key.
The broker should have a queue which will hold the video keys sent by the server and will forward it to the device on…
ron123456
- 403
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8
votes
1 answer
Hacking a Google Home device to put a "hard switch" on its microphone
It's my understanding that Google Home devices all have a soft switch for their microphone; i.e. no physical circuit is broken when you turn it "off".
Is it particularly difficult to open it up and maybe add a bit of wiring to convert it to a hard…
D Hydar
- 181
- 3
8
votes
1 answer
Control arduino via MQTT
I working with several arduino board and now I need to control them via a web interface.
Via web interface I want to activate GPIO.
I have two ideas:
Each arduino acts as web server and I can control the GPIO via the Arduino web page. Basically…
Federico
- 183
- 4
8
votes
1 answer
How to Use Alexa & Raspberry Pi switch things wirelessly?
I wanted to use my Amazon Echo Dot to connect to my Raspberry Pi, and have it turn on switches wirelessly.
What I have done: I have been able to use Makermusings's Fauxmo and a relay board to "trick" Alexa to think that the Raspberry Pi is a Wemo…
Nicolas Shu
- 183
- 4
8
votes
2 answers
Door bell with Wi-Fi camera
I'm looking for a door bell with a camera I would prefer something like 180° fish eye with 4k, but I guess there is nothing on the market so 160° with FullHD should work too. Should I mention that I want night vision too? ;)
I checked NEST Hello,…
rekire
- 303
- 2
- 11
8
votes
1 answer
Control Samsung Smart TV (Infrared Remote) via Hue / Zigbee?
Is there any possible way to remote control my Samsung Smart TV (which has an infrared remote) via my Philips Hue system, which communicates over Zigbee?
It seems like ORVIBO is producing such stuff, but I can't find any further information, nor a…
Simon
- 183
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8
votes
1 answer
How do you clear Alexa music history?
How do you remove an item from Alexa's music history, as shown under the history tab of the music section in the Alexa app?
stovroz
- 180
- 1
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8
votes
2 answers
What is difference between a mote and a microcontroller equipped with sensors and connectivity?
Reading some papers about IoT and Wireless Sensor Networks (WSN) I came across mote devices and have seen there are lots of them.
I have understood that they are the leaves in an IoT system and that they are embedded devices equipped with sensors…
Francesco Boi
- 541
- 3
- 12
8
votes
1 answer
How would I use HTTPS on the web-based device config running an access point and no internet access?
I'm building a Raspberry Pi-based device for backyard gardeners that has a web page and access point for the initial configuration, including the Wi-Fi configuration. The connection uses WPA2 and the only two devices on that internal network would…
Slow Bro
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8
votes
1 answer
What's the purpose of a gadget snap in Ubuntu Core?
I've been looking into how to set up Ubuntu Core (the IoT version of Ubuntu) on a Raspberry Pi, and I've read about gadget snaps, which the documentation says is intended to define the device features:
The gadget snap is responsible for defining…
Aurora0001
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8
votes
1 answer
What is the maximum Packet Size of a LoraWan including the phy headers
I created a LoRa to USB pass-through via Arduino in order to use it as a temporary gateway for development purposes. So somehow I need to know how big a LoRa packet including PHY headers is, in order to determine how long it will take my software to…
Dimitrios Desyllas
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