Internet of Things Stack Exchange
Internet of Things Stack Exchange

Most Popular

more tags
1500 questions
3
votes
1 answer

Where do SonOff schedules reside?

Using the stock firmware, I've set up a schedule for my one SonOff RF using the app on my phone. Observation suggests that this schedule is not running, and I wonder if this is because my phone is aggressive about killing background processes when…
Sean Houlihane
  • 10,524
  • 2
  • 26
  • 62
3
votes
0 answers

How to optimise WiFi and ZigBee Coexistence

Assuming I'm not ready to give up 2.4 GHz wifi just yet, and I'm mostly immune to interference from nearby installations (i.e. I have control of any relevant configurations), what should I be doing to minimise disruptive interference between the…
Sean Houlihane
  • 10,524
  • 2
  • 26
  • 62
3
votes
1 answer

Alexa - call web API in localhost from AWS Lambda Console

I have my Alexa's lambda function on AWS Lambda Console. There I call a web API I created. If I call my web API on Visual Studio Code, it works great. But if I use Alexa Developer Console to call my web API, it always says: Error: connect…
Ninita
  • 153
  • 4
3
votes
0 answers

Does SenML provide any fields that describe the sensor itself?

I am trying to look into the aspect of sending meaningful information from sensor nodes with the whole field of IoT. Here, meaningful being context-aware. If I send information from a temperature sensor, it might not be enough just to send the…
Shan-Desai
  • 1,558
  • 10
  • 23
3
votes
0 answers

Proper way to add an Echo Dot 2 to my existing system

I have an Echo 2 paired with an Amazon Bluetooth receiver which in turn feeds an 70v Amp that plays throughout the home. This works. However, my wife has to constantly go from the Kitchen to the Great Room to speak to "Alexa." My solution was to…
DJGray
  • 161
  • 3
3
votes
1 answer

Force Echo 2 to Mono Output

My Echo (2nd Gen) is paired with a Bluetooth receiver which, in turn, feeds that signal to a 70 volt Mono amp that services the entire house, one speaker per room. Listening to the music, it sounds very much like I am getting only the Left or Right…
DJGray
  • 161
  • 3
3
votes
0 answers

AWS Greengrass Raspberry Pi scanning for Bluetooth LE

I have a AWS Greengrass setup where I would like to have a Raspberry Pi constantly scanning for BLE devices and if anything is found publish a message via MQTT. I've gotten the script to work locally on the raspberry PI (running via cron) but when I…
Brian McCall
  • 131
  • 2
3
votes
0 answers

Most scalable LWM2M server implementation

What is the most scalable (considering the number of IoT devices managed) server side implementation of the OMA LWM2M protocol? Which language is it using? We can use Eclipse Leshan as a benchmark, which is written in Java. To be more concrete,…
Rexcirus
  • 231
  • 1
  • 8
3
votes
0 answers

Can't Exclude or Reconnect Switch

I have a Smartthings V2 hub that supports my Z-Wave mesh. I have GE Dimmer Paddle Switch that stopped responding to my hub. I tried to exclude it (both just the item in question and then a general exclusion). The exclusion process hung up and it…
salisboss
  • 181
  • 1
3
votes
1 answer

Possibility of integrating secure elements with sensor networks?

Assume we need to do a type of digital signature such as ECDSA with sensors used in sensor networks. So, is there a secure and possible approach to store the keys in these sensors? For example, is it possible to integrate a secure element with…
Questioner
  • 133
  • 3
3
votes
2 answers

What happens internally when ESP8266 goes into deepsleep mode?

What happens internally when ESP8266 goes to deep sleep mode. Is there any official documentation explaining that?
a-c-sreedhar-reddy
  • 477
  • 5
  • 17
3
votes
2 answers

Choosing a microcontroller for IoT project

I'm currently working on an IoT project. The principle is to have a box that could connect to a phone over Bluetooth on some NFC contact. After the phone and the box will communicate messages over Bluetooth to the phone. The box must be able to pair…
Sebz
  • 31
  • 3
3
votes
1 answer

Distance calculation based on RSSI value

I want to calculate the RSSI value of a Bluetooth module (HC05) and from the derived RSSI value I want to calculate the distance of the surrounding devices. I'm using an Arduino Uno r3 as a controller and the Arduino IDE as a programmer. Actually I…
Arockia Jegan
  • 166
  • 1
  • 4
3
votes
1 answer

Can't connect to Onion Omega 2

I have an Onion Omega 2 which I haven't used for a year or more and would like to use for an IoT project. I have attached it to the Expansion Dock, and connected it to my laptop with a USB cable. Four white LEDs flicker constantly, but I don't see…
Mawg
  • 3,147
  • 1
  • 13
  • 35
3
votes
1 answer

MQTT Library for Arduino using GSM

I am developing a vehicle tracking device.I want to send data to server through MQTT from my sim808 GSM module.But I couldn't find any good library of MQTT for Arduino. There are so much resources for Wi-Fi module but I'm using a GSM module.
Iqbal Hossain
  • 79
  • 4
1 2 3
…
99 100