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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6 views

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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1answer
48 views

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 ...
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2answers
684 views

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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2answers
33 views

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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1answer
23 views

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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9 views

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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1answer
34 views

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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2answers
49 views

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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1answer
4k views

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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1answer
25 views

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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2answers
501 views

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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1answer
44 views

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 ...
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2k views

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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1answer
60 views

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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0answers
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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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4answers
2k views

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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35 views

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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1answer
980 views

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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8answers
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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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2answers
103 views

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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2answers
45 views

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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1answer
549 views

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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3answers
209 views

Devices suited for Industrial IoT

I was wondering which devices are used in IIoT applications. Are devices like ESP8266, ESP32, etc. (or other used in makers world) reliable for use on industrial/critical environments? If other parts ...
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2answers
252 views

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 ...
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3answers
2k views

KNX/IP gateways with support for KNX Web Services

Introduction KNX is a standardized, OSI-based network communications protocol for building automation. It is the successor to, and convergence of, 3 previous standards: EHS, BatiBUS and EIB. KNX is ...
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1answer
662 views

How to start IoT development to send commands from IoT Hub to Device

I'm a .Net developer recently started working on WindowsAzure IoT, but my role is just creating web API's to provide data to client (Mobile App) sent by IoT devices. I want to send commands to ...
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3answers
395 views

DIY smart button to trigger phone app

I am planning on making a button that is when pressed sets an alarm on my phone. I am planning on making an app that is creating the actual alarm, the app just have to be triggered by the hardware ...
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1answer
495 views

How can I detect Alexa's current state or change its current state with an external device?

I want to have custom wake-word for Alexa so I want to interface this Amazon Echo with an external device. I am wondering if it is possible to create a proxy device that would wake up Alexa if I give ...
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2answers
58 views

Rogue Start-Up of Robot sweeper

I have an Xiaomi Mi robot sweeper and at 7:00:40pm each day it is being started up by a rogue internet message. I saved the active IP table from the DD-WRT router firmware immediately before and ...
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0answers
134 views

InfluxDB in Single Node Embedded IoT Applications

According to the Documentation for InfluxDB v1.4, InfluxDB should be run on locally attached SSDs. Any other storage configuration will have lower performance characteristics and may not be able to ...
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1answer
885 views

Are there any devices with open-source protocols over Wi-Fi?

I know how to program IoT using Arduino; but I want some ready made portable IoT devices that do not need any programming at device side. Just I want to buy and add these devices to the network (after ...
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0answers
41 views

out-of-the-box sensor nodes ready for deployment [closed]

I am on the lookout for sensor-nodes that do not require any DIY or sensor interfacing. Purpose This is because, at times one might just want to setup an IoT Network without having to program or ...
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1answer
66 views

Is static IP needed if using VPN to connect to IoT devices?

I have an IoT solution that I need to connect to from remote. I don't have access to open ports nor set static IPs on-site where the IoT devices will be hosted so I was looking for other solutions. ...
4
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1answer
228 views

Entropy depletion in /dev/random on Beaglebone

I have a Beagleblone Black with an ARMv7 SoC. /proc/cpuinfo says the hardware is Generic AM33XX. It is running Debian and the 4.1.15-ti-rt-r40 kernel. I run a lot of stress tests as part of my ...
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2answers
73 views

Zigbee controlled signal routing?

I'm thinking of a possible way to allow Hue Bridge to command simple signal routing. I find myself rewiring my audio setup a lot and was about to just make a simple passive signal chooser dial box, ...
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0answers
51 views

How to use dedicated cryptochips

I have a chip that needs to send arbitrary data to a server that I do not control. We're using mbed TLS at the moment, however the binary is quite large. So, we introduced a dedicated cryptographic ...
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1answer
191 views

Sonoff basic- GPIO’s

As far as I found documented- there are GPIOS 0, 12, 13, 14 on a basic Sonoff. Does anyone know if Tx/Rx are free to use after uploading my code, as GPIO’s ?
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0answers
444 views

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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0answers
707 views

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 ...
5
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1answer
91 views

Can environmental polluting gas sensors detect emissions of a low speed passing vehicle? [closed]

I am thinking to develop a remote-sensing applications for vehicle pollutions. In such cases generally expensive optical IR and UV sensors are used because more precise. On the contrary gas sensors ...
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3answers
1k views

List of BLE hardware devices & what BLE services that they support

I'm looking a simple reference list that would shows me the supported BLE Services on each devices - for example; MIO Heart Rate Global -> (Heart Rate 0x180D) Archon Wireless Bike Meter -> (Cycling ...
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2answers
330 views

What is difference between a mote and a microcontroller equipped with sensors and connectivity?

Reading some papers about IoT and Wireless Sensor Networks (WSN) I came across mote devices and have seen there are lots of them. I have understood that they are the leaves in an IoT system and that ...
7
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1answer
181 views

Cheap PoE board with TCP/IP support

I have a small IoT project where I want a network enabled electrical relay. I do not need full network plug nor linux on it. It just should be small and cheap. I feel smart enough to write a small ...
4
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0answers
64 views

Devices wth Support for BLE Services 'Location and Speed' and 'Heartrate'

I need a BLE test device that supports at least Location and Navigation (0x2A67) 1 Heart Rate (0x180D) and optionally Health Thermometer (0x1809) Can anyone recommend one? Edit: I'm not looking '...
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0answers
57 views

How to reset motes (Telosb) at same time?

I need to start the motes to let them run at the same time, then monitor their behavior by their serial output, the only observer is my PC. Except to restart the mote by pressing the reset button on ...
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2answers
164 views

What is the best sensor for the measurement of Carbon-dioxide?

I need to measure the amount of carbon-dioxide in parts per million (ppm) within a closed environment. Currently, I am using a MQ-135 gas sensor which has some sort of concentration on Carbon-dioxide. ...
10
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1answer
121 views

Building an IoT product - what is the best way to avoid sharing in-house proprietary code?

I think it was hard for me to formulate the title. However, I can still explain my problem in more detail in here. I am designing an embedded product which consists of cloud service and embedded ...
9
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1answer
151 views

Wio Node setup failed

To setup Wio Node, I installed the Wio Android app. The procedure doesn't end when I try to connect Wio Device like the image. After that I installed wio-cli and a driver for Mac. Then logged in. %...
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0answers
106 views

How to Make Custom-Length Jumper Wires [closed]

I am prototyping a Wi-Fi thermometer with an ESP8266 and an HT11, it works on the breadboard (!) and now I am designing a 3D printable cabinet. I would like the final thing to be completely dis-...