Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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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
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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
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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
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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
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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
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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
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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
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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.
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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
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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
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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
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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
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Automatic link failure detection methods in ZigBee networks

Given a ZigBee mesh network with several nodes in it. There are established links between each node via router nodes. If Node A wants to send a message to Node Z for the first time then Node A must perform a Route Discovery to determine which…
Bence Kaulics
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What is a good reference for Ethernet Driver without an OS?

Soon I will be working on an Ethernet implementation for a bare metal (no OS) capability on an ARM-based processor. I am somewhat familiar with the Ethernet driver model in the Linux Device Drivers book, but I'm wondering if there is a reference…
netskink
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Will changing my user name and password block Mirai attacks?

I've recently been reading about Mirai, malware whose source has been revealed which is designed to infect IoT devices. It is appears to be a serious threat to security compromised Internet of Things devices. According to Wikipedia: Mirai…
anonymous2
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