Questions tagged [hardware]
For questions concerning IoT hardware, hardware recommendations, and hardware support. Read the full tag wiki before asking for hardware recommendations; there are specific requirements for a good question. Additionally, consider asking at Hardware Recommendations for general hardware questions.
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How to use DIY keyboard connected to spi (gpio) of single board computer
I want to build a diy keyboard which connect to the spi interface of the gpio header of the orange pi 5 (ubuntu/linux).
So far I have some sketches of the keyboard, the schematic is in progress.
The ...
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Matter node behavior in Matter protocol
What is the difference between MQTT and Matter protocol? Can I send Matter message between two different networks if Matter devices using link-local address?
CommunityBot
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Which microcontroller should I select for my project idea?
I am an IT engineer but always wanted to learn electronics and IoT. I have a project idea in mind for which I am unsure which MCU should I use. I have previously used Arduino, ESP8266, and ESP32 for ...
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Running Philips Hue Entertainment with 3rd-party lightbulbs?
I bought this innr light bulb for my Hue system and it works just fine except for the fact that it isn't compatible with Hue Entertainment. As it turns out, no 3rd-party light bulbs are supported by ...
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How can I make my dumb TV bed lift smart?
I'm an experienced developer who is looking to make the foray into IoT hardware. I have written applications in C and C++ in the past and I'm currently interested in Rust. I have little to no ...
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UDP communication with XBee Wi-Fi S6B
I am an absolute newbie when coming to using these modules. I am trying to setup a basic UDP connection between my XBee S6B (UDP Client) to my computer (UDP Server). I have added my codes below. The ...
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Why can't I update my Ember mug's firmware?
My Ember mug has a firmware update available, but when I try to update it the process fails at 50% during a reconnection step. How do I make sure the update is able to finish?
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How to count people in a given area without using phone traffic data?
DESCRIPTION: I am working on a project to find out how many people are in a given region. Basically I want to make a heatmap showing how people move in a specific day throughout 24h. In order to do so,...
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Controlling Google Assitant compatible devices via HTTP/MQTT
I would like to control an IoT device that is compatible with Google Assistant/Alexa/Smart Life locally within my network using some open API over HTTP/MQTT. Is this even possible or is the only way ...
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Looking for thermostat with web interface, MQTT capability, not dependant on cell phone apps
Does anyone make a thermostat with (ideally wired ethernet) or wifi network connectivity where the device has a web gui interface that can be accessed and programmed with a browser (ie not dependent ...
CommunityBot
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Remotely controlled alarm
I would like to find, or if necessary, create a device that can be set to go off with a chime or alarm of some sort at certain times throughout the day. If that was all that was required, then no ...
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Help selecting a microcontroler
I need you help, currently I`m searching for a microcontroller
That supports ultra power mode.
Has bluettoth support.
Can be waked up by a wireless interruption.
The microcontroller must be powered ...
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Z-Wave switches with 2-way switched lights?
I'm looking for a set of Z-Wave (preferably Z-Wave Plus) components to use in order to merge two 2-way light switch circuits and allow control of both lights from all switch positions. I've looked at ...
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How secure connection between modem and microchip
My board has a separate Quectel MC66 modem and STM32 microchip. The communication between modem and microchip is AT Commands.
If a hacker connected a wire between modem and microchip, he could have ...
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Does iPhone 11 device contain multiple UWB receivers?
Does iPhone 11 device contain multiple UWB receivers?
Angle of Arrival (AoA) is often required for many applications for UWB enabled devices. I wonder if modern UWB enabled devices i.e. iPhone 11 ...
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Can IoT devices share their own capability/resources with another device?
Hello IoT Stack community !
I am sort of a beginner at IoT and looking for some guidance and help
I am struggling to wrap my head around the following concept;
Is it possible for IoT Device to share ...
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Can a device like chromecast degrade over time?
I'm having trouble connecting to my chromecast in any apps. Sometimes it works fine and sometimes it just won't work. I can see that it is connected to my WiFi network and I've read the very helpful ...
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TFT screen shield worked and quickly quit
I bought an Arduino Uno board and the Elegoo 2.8" TFT Shield. I plugged them together. It just worked. Examples from Elegoo including graphicstest and displaystring worked great. Then I tried ...
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ESP32: no signal output on I2C bus [closed]
I have an ESP-WROOM-32 (I2C master) and an ATmega328p (I2C slave, address 0x03) assembled on a prototype PCB using external 6k8 pullups.
I'm using the ESP's default I2C pins 21 (SDA) and 22 (SCL) as I ...
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Standalone NFC/RFID with WiFi/ethernet network connection
I spent many hours looking for a device for my iot project. So far, everything I find does not meet my expectations. I prepared two prototypes - one based on rpi zero and one based on esp32, but I ...
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Mains circuit phase balancing relay?
I am looking for a device, like a special relay that would allow me to dynamically switch/move some of my home appliances between the 3 phases that I have on my mains circuit. Is this possible?
The ...
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Non-locally Electrically Programmable Logic Gates - Technological Advances Progress
Preface: I’d like to clarify that I understand what a relay is and that a PLC uses a fairly conventional microprocessor that only digitally establishes logical logic gate configuration as a digitally ...
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Are there still any cheap hardware solutions to providing IoT devices with cellular connection with the shutdown of 2g networks
I am currently attempting to design a small custom PCB based IoT business cards that communicate over a cellular network for the purpose of impressing employers. Since I will literally be giving these ...
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IOT prototyping
I am having a difficult time figuring out how to prototype in the IOT realm. This mainly stems from the accessibility of components and modules; and the size of them. Here is what I have done so far.
...
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Making a smart light switch
I want to make a home automation system, and I need some computer-controllable switches. The reason I can't use relays is that I also need the switches to be switchable manually and not ...
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What are the boot requirements for an IoT device for the automotive industry? [closed]
Are there any specifications for a IoT device that's targeted for the automotive industry? I refer to a standard that puts constraints on boot and restart times for both the HW and SW?
Let's say I ...
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Selecting a microcontroller for a battery operated data collection project
I am planning to measure water level in a well, which is about 10 m deep with maximum water level up to 5 m. My plan is to use ultrasonic sensor HC SR04 to measure depth, transmit it via ZigBee to a ...
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Which microcontroller and programming language should I use for an Internet-enabled weather display?
I am a newbie in IoT and want to start my career in IoT. As I search on Google for startups in IoT, I found many blogs. And I found the languages used in IoT like C#, Java, Node.js, and the ...
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Guidance for a data logger and radio
I've currently been working with a consultant, whom recommended we utilize an architecture that is based off the Microchip ATMELAVR 8 bit Arduino framework. The board is called a Mayfly, picture ...
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Control Raspberry Pi depending on Wifi-Users
I am creating a "digital dashboard", consisting of a TV and a Raspberry Pi 3B+. The TV just shows calendar, time, weather, etc..
In the tutorial I am following for that, the creator uses a ...
CommunityBot
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UK-compatible (240VAC) receiver/controller for ceiling fan with dimmable lights
I have a 3-speed ceiling fan with integrated dimmable lights which when installed prior to my owning the house was fitted with an infrared wireless receiver.
For a long time the remote did not work (...
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mail in box detector
I would like to monitor my physical mailbox so I can know when something is inserted in it. The reason is this was an abandonned mailbox for years so people are used to put the junk mails in it (...
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How to control an ESP8266 via the Wi-Fi?
Summary
I would like to build (ideally based on ESPHome) a device with a buzzer I can trigger remotely via the network.
Context
I have several systems built around my home automation system:
Home ...
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Identify the ancient IOT hardware model and find out its driver
Found from the bottom of my gadget box, I am trying to use this board for my hobby project, but I cannot even remember what model it is.
Could anyone help please to identify the model of this board?
...
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How to use the new tools to do development on my ancient Fez Hydra
I dug out my ancient mainboard Fez Hydra and am trying to use to do my hobby project.
Upon reading the instruction, I found that it requires to install VS 2013.
I have VS 2019 installed already and I ...
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Reading from sound sensors or gateways with high level languages
I was asked to implement a system for collecting data from a sound sensor. I have no idea where to start so I'm asking for some guidelines since IoT is completely new to me. The place where the data ...
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ESP32 always high pins screwing analog measure
TL;DR When trying to use some pins of my ESP32 to read analog signals, it turns out those pins have a non-zero voltage, messing up the measurements. Why?
I got myself an Olimex ESP32-POE-ISO (see ...
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How do the AirPods communicate with the phone?
By reading the iFixit Teardown, one can realize that the AirPods use the W1 chip for wireless communications. Since both Airpods are wireless, there are questions still unanswered.
Do both Airpods ...
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Bluetooth Input Hub
I am wondering if anyone knows about some existing 'off the shelf" hardware options where some device could connect to this Bluetooth "Input Hub" where this hub can have inputs plugged into it and any ...
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What are affordable solutions to air quality monitoring system?
I would like to measure the air quality related to road traffic in a city for an IoT application.
The European Environmental Agency has defined quality indicators (good, bad, etc) according to the ...
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Search for a device that uses a mobile sim and that acts on a relay by ringing the sim
I am looking for a device that has an internet connection via a mobile sim. It allows owners of enabled telephone numbers to switch a relay by ringing the device sim.
The system will be used to allow ...
CommunityBot
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How to program my own smart home with raspberrypi 3? [closed]
Hello smart home enthousiasts,
I'm a software engineering student and I want to start a new project for myself. I really like smart home stuff, but I don't want anything to do with google or amazon.
...
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Seeking a board (STM32?) for Ada coding - are you experienced? [closed]
I am looking for a board, and think that I need someone to say that they have used it, rather than googling for it. In the immortal words of Jimi "are you experienced?"
I would like to program in Ada,...
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Why are Zigbee hardware modules so expensive?
The Zigbee hardware looks quite simple to produce1, why are they so expensive?
For comparison I can get a 855 Mhz wireless module for 2-3€ but I can't find Zigbee modules under 15€.
[1]
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How to keep users from breaking buttons [closed]
Simple problem, if I have a large button a user can put their hand on then I'm afraid they can put too much force and break the electrical button underneath.
If I make the external button bottom out ...
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How does an Azure IoT Hub interact with Embedded/IoT devices?
I am working on the Azure IoT platform, and I understand how devices send data to the IoT hub (if I am not wrong, It is just web service call or something similar to that).
But I wonder how the IoT ...
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Cheap IoT microcontroller with PoE
Can anyone recommend a simple micro-controller with some I/O (<8) that can be powered using PoE, something cheap like Raspberri Pi Zero. The requirements are:
Support PoE integrated. No power ...
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Why does the ARM architecture dominate the IoT market? [closed]
I would like to understand why we use ARM for routers, cell phones, cameras, refrigerators, smart TVs, and everything, instead of using any other architecture like x86.
What are the advantages of ...
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WLAN Hotspot Internet sharing possibilities?
I figure this is the best place to ask.
Many IOT devices need to be connected to a network, and sometimes require Internet access, but not 100% of the time.
Usually it's fine to just connect them to ...
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Hacking a Google Home device to put a "hard switch" on its microphone
It's my understanding that Google Home devices all have a soft switch for their microphone; i.e. no physical circuit is broken when you turn it "off".
Is it particularly difficult to open it up and ...
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