Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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3 answers

Do two way communication smart ZigBee switches exist?

Previously posted on Home Improvement however it received no responses. I have "smart" ZigBee lightbulbs throughout my home, as we like being able to change their colour using Alexa. I also have, but do not use, "dumb" physical light switches, as…
James Geddes
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FIWARE: NGSI-compatible sensors for IoT data gathering

I am preparing to conduct a research for IoT, collecting environmental data from different sources (temperature, humidity, light, air quality, GPS, etc...). What could the best set of tools or combination that would be most appropriate, especially…
super_ask
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How to enable a device to follow you?

I am trying to find out what IoT devices I shall use to enable an device(say a small toy car) to have a ability to follow a particular person. So far what I have found: QR Code, print out the QR code and stick to yourself and let the car to track…
Franva
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Using Alexa as speaker over LAN

I would like to use my Alexa as a speaker for my (windows)PC. My PC doesn't have Bluetooth and Alexa is not directly connected to my PC. Since the Alexa is connected to the same router (via WiFi) as my PC(via Ethernet), I was wondering if I could…
green bobcat
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DDOS Protection in Open Source MQTT Brokers

I'm doing a research on DDOS protections in MQTT brokers and I started with open source Mosquitto broker. I couldn't find any countermeasure listed in the documentation page. Since my C language knowledge is not that deep, I would like first ask…
JollyRoger
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Does mosquito broker persist LWT messages to disk, so they may be recovered between restarts?

I have two RaspberryPis, one with the mosquito broker, and one acting as a client. The client has set up a LWT with the broker. After a power outage that affects both RPis, both RPis come back online, but the LWT is never sent. I expected it would…
Cam.Davidson.Pilon
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LoRa point-to-point communication

I would like to create a point-to-point connection between a LoRa temperature sensor and a M5 Stack (ESP32) with LoRa module. However, I am a beginner with LoRa, so I have a few questions: Are all packets send with LoRa (not LoRaWAN) encrypted? Or…
Nina
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Are there Arduino boards that can be used as a small web server, supporting HTTPS?

I would like to control a relay from over the internet. I was thinking of making this using an Arduino and some wifi/ethernet shield. Searching the internet, I see a lot of shields and modules that make it possible to create a small "web server" to…
user2190492
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ESP32 MQTT error

I have been trying to connect my ESP32 board to my laptop via MQTT. I have installed Mosquitto MQTT broker on my laptop but I fail to connect my ESP32 every time. This is the test code I am using to check MQTT connection. #include #include…
P_K
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How to programmatically retrieve the public key for a Thing in AWS IoT Core?

I am building a system where I would like to send an encrypted message from AWS Lambda (via an AWS IoT Core rule) to a device. Ideally I would like to encrypt this message using the device's public key (stored within AWS IoT Core); however, I cannot…
Suever
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How to monitor old machines?

I want to Monitor/report 5 water flow meter. My current flow meters give pulse signals. Details Small data deviations, connection failures is not an issue for me What's the simple, cheapest, up-to-date, durable solution for me? What subjects…
Uğur Özpınar
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"Smart" switch keeps disconnecting from wi-fi network

I bought a smart switch to control my room lamp. It is a JWCOM Smart SA-01 model with very little to no documentation available on the internet (at least I wasn't able to find anything useful). The problem is that whenever I connect the device on…
Ícaro Lorran
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Avoid keyboard interaction by passing WiFi credentials through phone via bluetooth

We're designing an IoT device that needs to connect to wifi, but the screen is too small for a keyboard. Can wifi credentials be passed via bluetooth to the IoT device from an iPhone or Android? Would someone please validate this is an available…
LucianNovo
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Where to find Desktop Occupancy Sensors without attached service

I was curious and wanted to see, what it might take to build your own desk availability solution. It seems the way to go is to use some kind of lowband pir sensors, but my Google-fu is rather poor. I can find many sensors and solutions, but all the…
Verakso
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Bare minimum infrastructure to keep a fleet of IoT devices running and ensure updates to OS and applications?

The number of currently available tools to run and maintain a fleet of IoT devices is staggering. To compare all is not feasible, however a list of the bare minimum required features to look for would speed up the process of finding the…
Daniel
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