Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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1 answer

How long should a FreeRTOS task be delayed in each loop?

I'm working on an AWS IoT project where the MQTT routines, callback lambdas and kind of everything else apart from initialisation are inside a task created by xTaskCreatePinnedToCore(). This task does few things: connect to AWS, subscribe to topics…
haxpanel
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Controlling WiFi switches from physical switch

I'm looking to install smart switches for my lighting. Since I have LED lights and 2-wire circuits to the switches (no neutral), I'm looking at wifi controlled remote relays - which I can find no problem. However, all these switches seem to…
Sean Houlihane
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Embedded C—check internet connection

Is there any way to check if actually my embedded device has a working connection (i.e. can reach the WAN)? My device has no RTOS, so I cannot rely on OS functionalities like ping. I can see that the DHCP gives a correct IP to my device, but it's…
panc_fab
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Mosquito MQTT Thingsboard and Thingsboard IoT-gateway on same server

It would be much appreciated if someone could tell me the settings to run Mosquito MQTT and Thingsboard with Thingsboard IoT-gateway on the same server. Mosquito is receiving on port 1883 which is working. Were do I need to configure the ports (must…
Frank
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2 answers

Why is 5G a plus for IoT?

I'd been hearing a lot about 5G recently from a few people I know, and one of the frequent claims that I heard was, "5G is going to be such a great help for the Internet of Things!" I may be a hopeless cynic, but I began to wonder, just why would…
anonymous2
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4 answers

Data visualization and device management

I'm looking for a solution to manage (virtual) devices and visualize data. I have a lot of time series data grouped by sessions and devices stored in a database. That data is coming from multiple physical sensor devices. Now I am looking for a tool…
CPA
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9
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3 answers

How can I programmatically tell a camera where to point?

I don't have a particular camera in mind right now, I'm just curious how this is done, programmatically/mathematically. I have a 3D space, a rectangle, with a camera up in one corner looking inwards. I have a moving object in that rectangle that's…
mal
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Subscibe to specific device with AWS or Azure IoT services

There are 1,000 IoT devices which need to send data to the cloud each second. There is a mobile app. The mobile app user can see messages from a single device at a time only. Is there any simple (built in) way to achieve such subscription to single…
Ingweland
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1 answer

3G SIM5320 support for MQTT

Looking for feedback from others who have been using the SIM53xx series modules for IoT solutions over the 3G network. I have an MQTT broker on the internet to collect data for a fleet tracking system being developed. There is a lot of information…
deandob
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2 answers

Trigger to remote server when my device in low-battery?

Currently, I working on a project to make a car tracker device. At the moment, the device can work well, but I want to improve it. The situation is that my device is running on a external power (lead-acid battery) and I want to send an alert to…
juggernaut156
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1 answer

Unable to receive RF signals from a remote using a RF receiver

Problem I am unable to receive the signals sent with a KaKu APA3-1500R remote with a RF receiver connected to a Raspberry Pi 3. Hardware -RF Receiver (in Dutch) -KaKu APA3-1500R (in Dutch) Additional info The receiver works correctly. This I know…
MuadDev
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Can Alexa routines run arbitrary commands?

I have some skills that require quite a long phrase to activate (eg. "Alexa, tell Smart Remote to turn on my TV"), but it seems quite redundant for me to repeat this, when I'll be using the same skill every time for this task. I would rather say…
Lambda
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2 answers

Should I use the MQTT protocol?

I am planning to start to implement the below IoT use case. Use case The IoT devices will send 100k messages/minute to the gateway via repeaters and the gateway will transfer the messages to the cloud. I want to track the employees in an…
SKK
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Alexa app drop in feature and contacts missing after upgrading iPhone

I am missing the drop in feature and my Alexa contacts after upgrading my iPhone (7 plus to 8 plus). Restarting the app does not help. I know I am logged in and connected because I can see the history of commands on all of my devices and see that…
Dan
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Can't connect Philips Hue Bridge with network

I have installed the Philips Hue Light Starter Kit (Bridge + 2 White Lamps). Yesterday this worked well and I could control it via App or Alexa. Today the Hue Bridge disconnected from network and I'm not able to reconnect it. I restarted my…
Sebi
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