Internet of Things Stack Exchange
Internet of Things Stack Exchange

Most Popular

more tags
1500 questions
10
votes
2 answers

Ways of testing IoT sensor security

I am supervising a group of students and their task is to build iot sensors for a few different tasks (ie temperature, movement). I want to score them on how securely they design their sensors among other things, since security seems to be such a…
user2309
  • 101
  • 2
10
votes
1 answer

Do I have to manually enter expiry dates with the Smarter FridgeCam?

I've been learning recently about the Smarter FridgeCam. According to their article, one of the features is: Expiry date notification: Automatic reminders sent to your phone on food expiration dates. One thing I have been unable to decipher,…
anonymous2
  • 4,902
  • 3
  • 22
  • 49
10
votes
2 answers

Sub milisecond timer for ESP8266 in Lua

I'm trying to make a remotely controlled servo motor controller on ESP8266 which is controlled by a server. The problem I'm facing is how to make an asynchronous timer, like tmr.alarm(), but in microseconds. tmr.delay() doesn't work so well,…
Raitis Bērziņš
  • 363
  • 2
  • 7
10
votes
4 answers

How to enable WebSockets on Mosquitto running on Windows?

I have a Mosquitto broker up and running on my Windows machine. I don't remember if I installed it with Web Sockets support (Cause I didn't knew what that was, or if I needed it). But seeing now my requirement is to use JavaScript (Paho) to connect…
Salim Shamim
  • 753
  • 1
  • 5
  • 15
10
votes
1 answer

Can't Flash ESP8266 latest firmware, says "Fast Flashing error" and "Invalid head of packet(' ')"

I can't figure out how to flash the firmware found on http://www.electrodragon.com/w/ESP8266_AT-Command_firmware. I am using ESP8266 Download tool v3.4.4. When I am adding a firmware in download path it goes on till a fixed percentage (77 or…
Salim Shamim
  • 753
  • 1
  • 5
  • 15
10
votes
2 answers

Any way of using multicast through Border Router in Contiki?

I am trying to send a packet to several nodes from my PC through a border router. The nodes and the border router are developed using Contiki. The problem is that I cannot send multicast messages because the border router does not forward them to…
JuanMa
  • 345
  • 1
  • 8
10
votes
1 answer

What should be considered when building a wireless sensor network?

This question originates from a question asking about a specific detail about building wireless sensor networks. While answering the question, I wanted to share some general guidelines for the planning process of a wireless sensor network. So let's…
koalo
  • 699
  • 3
  • 13
10
votes
2 answers

Connect IoT devices directly to Wi-Fi , through VLAN or through a Raspberry Pi?

I have a bunch of IoT switches connected to my Wi-Fi. I am aware of three possibilities to connect and control them. Through the Wi-Fi directly (like Samsung SmartThings does) Connect them to a personal VLAN and use them (seems more…
Prashanth Benny
  • 545
  • 3
  • 20
10
votes
6 answers

Common APIs in C or C++ for the IoT

What are the common or usual APIs (or libraries) in C or C++ for the IoT, in the sense of having a documentation, a set of programming interfaces? (Like e.g. POSIX is for operating systems, Qt is for GUI, etc....). This short page motivates my…
Basile Starynkevitch
  • 263
  • 2
  • 8
10
votes
1 answer

Is this architecture feasible and flexible?

I'm having a but of trouble making sure my project really is feasible. What I want to archive: Control my Senseo coffee machine via internet. It boils down to simply controlling 2 buttons. First easy solution: Setup a NodeJS server on my Raspberry…
Etsitpab Nioliv
  • 203
  • 1
  • 6
10
votes
2 answers

How can I handle IP addresses changing when the router reboots with Home Assistant?

I have setup multiple lamps and sensors in my Home Assistant configuration. However, I want to know how to best handle the following scenario. If there is a problem with my router or a power cut and my router is rebooted. In this case there is a…
O.K.
  • 251
  • 1
  • 5
9
votes
1 answer

Alexa or Google Assistant "Find My Phone" integration with Android Device Manager?

Is there a solution for supporting "find my phone" from either Amazon Alexa or Google Assistant, using the native Android Device Manager? Or does Google even provide a web services API that could be used to develop this? My Google Home does not…
ziesemer
  • 193
  • 5
9
votes
1 answer

What conversational UI or voice command frameworks work offline?

Something I'm looking for is a conversational UI or voice command framework or extensible product (like Alexa) that can be used offline or without an internet connection. I haven't been able to figure out from Googling around if there are any good…
Mat
  • 91
  • 1
9
votes
2 answers

Receiving "ERROR" message from SIM800C module

Most of the commands I send to SIM800C module returns ERROR message to me. For example: If I sent AT+CSQ, it returns an expected response. One of the basics commands that doesn't worked for me is the AT+CPIN? PIN checking command. In the datasheet,…
luigiesn
  • 131
  • 1
  • 7
9
votes
1 answer

How to modify only the Client ID in an MQTT CONNECT message?

I am playing around with MQTT CONNECT messages. I have a simple C program which opens a TCP/IP socket towards an Mosquitto broker running on my laptop, sends an MQTT CONNECT message, (normally) receives the 4 byte long CONNACK reply then closes the…
Bence Kaulics
  • 7,843
  • 8
  • 42
  • 90
1 2 3
…
99 100