15
votes
Difference Between ZigBee and Z-Wave?
There are a few things that really distinguish Z-Wave and ZigBee from each other.
Frequency
The first (as Eirik M noted) is the frequency on which they operate. Z-Wave operates within the 915 MHz ...
- 251
15
votes
Accepted
Adding Devices to Samsung SmartThings
Apparently Smart things uses Z-Wave protocol among others like Philips Hue.
Maybe you should add your devices near the SmartThings hub for it to recognize them to check if they are compatible.
...
- 3,776
14
votes
Safety of a smart switch on a fireplace
In my opinion, "smart switches" are a natural progression of the current switch. I assume when switch-activated fireplaces first arrived people wondered "is it safe to have a fire that is activated ...
- 441
13
votes
Accepted
Temperature sensors affected by rain
A wet sensor will not measure the same temperature as a dry sensor due to the evaporation of water from its surface and with the required latent heat being supplied by the sensor, i.e. evaporating ...
- 2,539
13
votes
Accepted
Safety of a smart switch on a fireplace
There is no 'standard practice' for this sort of application to date. Simple, insecure, remote electrical switching is accepted practice - provided the switch hardware complies with the normal ...
- 10.5k
12
votes
Safety of a smart switch on a fireplace
As with all smart devices it completely depends on their security level. As such you have to evaluate the security level of the specific smart switch to determine its safety level.
If the smart ...
- 8,440
11
votes
Accepted
Why arp -a does not show all devices connected to WIFI?
ARP is the Address Resolution Protocol.
TCP/IP stacks use ARP to map between an IP address (like 10.0.1.1) and hardware (usually MAC) address, like 00:11:22:AA:BB:CC. Because there's overhead in ...
- 325
10
votes
Accepted
Difference Between ZigBee and Z-Wave?
I think there is mainly one thing you should care about: Is the ZigBee solution 2.4 GHz or 868/908 MHz? The 2.4 GHz penetrates less then ~900 MHz through walls, and the 2.4 GHz shares the spectrum ...
- 361
9
votes
Temperature sensors affected by rain
Building upon several years of deploying outdoor wireless sensor networks, I would like to add the following hint:
Think ahead and do not underestimate the problems arising from humidity!
I will ...
- 689
8
votes
Accepted
Which protocol should I use for automation devices in a home environment?
Here you have a nice list of 11 IoT protocols you need to know about.
Here is a summary in case the link someday breaks
Bluetooth Standard: Bluetooth 4.2 core specification Frequency: 2.4GHz (ISM) ...
- 961
8
votes
Suitable wireless technologies for high density industrial IoT
Your challenge is handling the throughput demands with channel contention. Your devices are all close enough that you need to assume they are all potential interferers to each other so you will need ...
- 10.5k
7
votes
Optimal Wireless Technology for High Data Rate & Low Latency IoT Application
Latency vs Rate
a low-latency (10 Hz) type of IoT application
This is a conceptual error. Latency and Rate are largely independent. You could have a system which recorded thousands of readings ...
- 1,888
7
votes
Accepted
What should be considered when building a wireless sensor network?
Please do not waste your time and make the same mistake as hundreds of research groups (including ours) made before for decades and just throw some unspecific sensors into the wild without knowing ...
- 689
7
votes
Accepted
Power consumption of ANT/ANT+ compared to other wireless sensor network technologies
The ant website has a power estimator which suggests an active 4800 baud connection requires less than 100 uA from a coin cell. I'm not too sure I trust the numbers there though, they look rather ...
- 10.5k
7
votes
Device for a motion tracker with BLE/Wi-Fi
Building your own device for this use case really is the wrong approach.
The industrial design to build something that will survive day to day use and be comfortable to wear with a useable battery ...
- 12.7k
7
votes
Local and distant MQTT communication
A broker like mosquitto will run happily on the Pi and bridge to a remote broker.
How much resources it will consume entirely depends on how much traffic you send through it and if you end up queuing ...
- 12.7k
7
votes
Accepted
Why are Zigbee hardware modules so expensive?
As comments indicate there is apparently indeed a licensing and certification process involved that might indicate where some part of the price stems from.
Though well known in the automation ...
- 8,440
7
votes
Why are Zigbee hardware modules so expensive?
There are a number of 802.15.4 solutions which are not Zigbee, and cost less. See this article: "What’s The Difference Between IEEE 802.15.4 And ZigBee Wireless?"
As I understand it, to use the label ...
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6
votes
Which protocol should I use for automation devices in a home environment?
Referring to the list of protocols provided in Snake's answer, it seems you need a protocol with a range of 20-100m, good low-power performance (ideally passive, but I don't know of any solution), and ...
- 10.5k
6
votes
Accepted
Creating an HTTP GET polling service on a Raspberry Pi Client
I found a good base solution for what @Chris Stratton refers to a kept alive TCP connection:
import socket
# Set up a TCP/IP socket
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
# Connect as ...
- 4,331
6
votes
IoT 2G wireless data - service providers options in USA
Have you looked at Particle.io or T-Mobile?
T-Mobile offer unlimited connectivity for $25/year per SIM. They also have a web management platform, API and can optionally integrate with Twilio's ...
- 161
6
votes
Controlling IoT device through a captive portal/web app over Wi-Fi & 4G/LTE simultaneously
Question 2.) Are there any other ideas that anyone can think of to solve this - even crazy ideas like XSS vectors to PUSH content into the captive portal from external servers?
If I may suggest, you ...
- 2,620
6
votes
Accepted
How to Use Alexa & Raspberry Pi switch things wirelessly?
Buy sonoff switches
Flash with MQTT firmware (https://github.com/arendst/Sonoff-Tasmota)
Add to wifi
Send MQTT messages from the Pi to control the switch
You can also use something like Node-RED (...
- 12.7k
6
votes
How does APN affect cellular connectivity?
This confusing behaviour is typical. The underlying reason is that it is up to the carrier to decide what to do with the APN setting — unlike most configurations of this form, you're not actually ...
- 683
5
votes
How do I check whether a LTE network supports CAT M1?
I tried hard to find out an AT command for that, but unfortunately I didn't find it.
Instead I found semi new slides about m1 and m2.
https://www.slideshare.net/mobile/SmallCellForum1/discussion-...
- 4,331
5
votes
Accepted
Wireless communication technologies for indoor location-tracking
I have used EPC GEN2 [EPC865-868 MHz(Europe), 902-928 MHz(USA)] technology for an automated document management system. You can find long distance antennas on the market. For example - GAO RFID can be ...
- 750
5
votes
Difference Between ZigBee and Z-Wave?
As a software guy—and a protocol stack guy at that—I tend to look differently at this than you might.
To me, these protocols are "low level" stuff (layer 1 & 2 of the OSI 7 layer model).
I don't ...
- 3,112
5
votes
Availability of Narrow band IoT modules or chipsets
It is still early days for NB-IoT and any hands-on with NB-IoT that is outside the large companies is only happening in lab and innovation environments. Mobile operators, such as Vodafone, and chipset ...
- 1,493
5
votes
IoT device (siren) with RESTful APIs
I don't think there are many off-the-shelf configurable end products (maybe a Kickstarter idea). The only one I found so far was Hexiware and I have no idea how complete that is. Cost wise, I think ...
- 10.5k
5
votes
Is there any surveillance camera that supports UDP broadcast upon motion detection?
The program MJPG_streamer has an UDP option. This program is commonly used with DIY security cameras running embedded Linux. This program does not allow motion detection however. You must sync the ...
- 489
Only top scored, non community-wiki answers of a minimum length are eligible