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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25
votes
8answers
5k views

As a Computer Science student, how can I develop skills for an IoT job outside of formal education?

In order to do well in a Computer Science related field, a college student has to do much more than just getting a degree—they must go above and beyond to be competitive with others in the field. As ...
23
votes
3answers
758 views

How can I properly test my device's PCB antenna?

I'm in the middle of testing a Z-Wave device I created with a PCB antenna. I want to make sure that the antenna has a good range and the signal strength generated is strong enough and comparable to ...
22
votes
3answers
934 views

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 ...
20
votes
8answers
9k views

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 ...
18
votes
4answers
830 views

Battery backup for small IoT devices?

I'm making a number of small devices such as temperature sensors, RF433 transmitter and receiver (for controlling and receiving devices => MQTT) mostly using EPS8266. They work fine, and are USB ...
18
votes
2answers
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 ...
16
votes
1answer
265 views

Is there a way to turn on large numbers of IoT devices remotely?

I have a lot of IoT devices that I am currently working on (read playing with). One of my biggest headaches is turning on the ones I need without climbing under my desk and plugging in a lot of wires. ...
14
votes
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]
14
votes
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 ...
13
votes
1answer
981 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 ...
12
votes
1answer
362 views

Can I implement a (weak) entropy source in FPGA?

I'm working with an IoT platform in FPGA for evaluation and prototyping. I need to provide support for TLS, and for that I need an entropy source. I understand that true random noise sources are ...
11
votes
4answers
2k views

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 ...
11
votes
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 ...
11
votes
1answer
251 views

Reusing / recycling a Petzi Treat Camera?

A few years ago I helped crowdfund a Petzi Treat Camera to feed my pet. Due to a broadcast pushed firmware update that I missed, it was rendered unusable. Thankfully, they did however send me a ...
10
votes
4answers
2k views

How does an experienced developer get started with IoT

I'm an experienced developer using variety of technologies as well as real time. I want to learn how to develop for a device which is not a computer, tablet, or any of the familiar devices everybody ...
10
votes
3answers
724 views

Power reduction for Raspberry Pi GPS/GSM tracker

I've recently built a fully functional IoT GPS/GSM tracker with a Pi Zero for a college project and now that it's finished and done with, I would like to minimize the current draw of the entire system ...
10
votes
3answers
259 views

Smart deadbolt without motor — Read-only Access

I have some needs I'd like to ask my Google Home if my front door is locked. I don't want my Google Home to be able to unlock my front door. I don't even want my front door to be unlockable remotely. ...
10
votes
1answer
385 views

Would RPI 3 serve as IoT server with MQTT?

I answered to the below linked question and started to think, what are the hardware specs for running an IoT stack of for example MQTT over LoraWan? Would Raspberry PI 3 survive or not? I do not care ...
10
votes
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 ...
10
votes
1answer
496 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 ...
10
votes
0answers
711 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 ...
9
votes
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. %...
8
votes
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 ...
8
votes
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 ...
8
votes
2answers
2k views

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 ...
8
votes
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 ...
8
votes
1answer
550 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 ...
7
votes
2answers
687 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 (...
7
votes
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 ...
7
votes
2answers
4k views

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 ...
7
votes
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 ...
7
votes
1answer
143 views

How can I design a simple Internet-connected controller for a sensor/heater?

I am in the process of creating a simple and cheap Wi-Fi PCB design that can send and receive messages to an app (through a cloud of course). I intend to attach this PCB to a fish tank temperature ...
6
votes
5answers
564 views

Looking for a relay that can be controlled from .net web application (via TCP/IP)

As part of one new requirement for web application I am maintaining, we need to send a signal to a device in a factory when certain conditions are met in the application. Sending a signal is simply ...
6
votes
3answers
825 views

Drawing parallels between building an IoT system and building a PC? [closed]

I am reviewing potential candidates for IoT position. The position in a industrial factory setting requires the candidate to contribute to the 4 stages of an IoT infrastructure as defined in the ...
6
votes
2answers
145 views

Which open source IoT board would be appropriate for a surveillance tool?

In the sea of IoT boards I would like to ask some advice regarding buying a board. Should be fast and compact (not Arduino) Open source hardware Should have Wi-Fi on board Should not have Ethernet ...
6
votes
1answer
789 views

Controlling IoT device through a captive portal/web app over Wi-Fi & 4G/LTE simultaneously

Yeah - mostly some mad scientist stuff here. I have an IoT project I'm working on where each device must be independently connected to each users phone and not connected to any central WiFi network. ...
6
votes
1answer
178 views

IoT for industrial warehouse management

Currently, I am using RFID technology for my warehouse management. My warehouse spans across 4 acres, I need to deploy so many RFID antennas and RFID readers to constantly scan the area for goods ...
6
votes
1answer
72 views

Looking for direction to find a specific hardware

I am struggling finding a specific hardware, here is what I need : Bluetooth Low Energy Beacon good range Button on it to send a signal to my iOS/Android app Possibility to switch off/on (not ...
6
votes
1answer
344 views

Availability of Narrow band IoT modules or chipsets

The Narrow-Band IoT radio protocol seems to have been around for a few years, but I'm struggling to identify any manufacturers of devices that are actually available to buy (either from traditional ...
6
votes
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, ...
6
votes
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 ...
5
votes
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 ...
5
votes
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. ...
5
votes
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 ...
4
votes
2answers
131 views

Motion sensor to monitor the movement of people

I'm about to start an investigation about people movement after a surgery (walk basically). I would like to know where should I start to look for movement sensors (pedometer/accelerometer). This ...
4
votes
3answers
210 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 ...
4
votes
2answers
47 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 ...
4
votes
1answer
230 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 ...
4
votes
1answer
50 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 ...
4
votes
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 ...