All Questions
2,230
questions
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answers
16
views
How does the anti-metal uhf rfid tag work?
When the RFID tag is close to the metal, because the metal has a strong reflectance to electromagnetic waves, it will be accompanied by a weakening of the signal, the card reading distance will become ...
2
votes
0
answers
18
views
ModbusRTU-MQTT Gateway Hardware
I am using currently a ModbusRTU-MQTT Gateway (HD67933-4-B2)
to access a AC climatisation Device from Toshiba.
A Intesis AC-Interface Device is
converting the proprietary Toshiba Bus from the AC to ...
- 21
1
vote
1
answer
31
views
Sengled Smart Plug with Echo dot
I bought a Sengled Smart Plug with Echo dot and I tried to connect them.
Alexa found the device and there is a set-up option. I click it and follow instructions.
It's finding the device, connecting, ...
1
vote
2
answers
41
views
Outdoor smart plug with real-time energy monitoring and notification
I live in Australia. I have a garden bore with an electric bore pump for garden reticulation (irrigation). The bore supplies water to taps (faucets) in the garden, as well as sprinklers that are on ...
- 13
1
vote
2
answers
51
views
Using a smart-relay or a smart-switch to automate smart lights
I have a couple of smart bulbs in my living area. I have a couple of presence sensors (with lux sensors) in the same room as well. I want to be able to automate the lights so that when someone walks ...
- 170
1
vote
1
answer
43
views
Calibrating MPU6050 sensor
So I'm using an MPU6050 module for detecting the impacts on a board to which it is attached, in-order to detect hits on the board, using the accelerometer sensors. The module is placed vertically(z-...
- 119
0
votes
0
answers
14
views
How can I ungroup these permanently grouped speakers on my Heos System
I am using a Heos / Denon system. I have speakers in each room with home theatre support in two rooms (Living and Lounge). For some reason these two rooms are permanently grouped together.
I can ...
- 103
3
votes
0
answers
22
views
How to use multiple characteristics when implementing Bluetooth Low Energy on HM-10?
I am implementing BLE with a HM-10 connected to an arduino UNO.
I have encountered an issue where attempting to add another characteristic results in the overwrite of the first one, leaving me with ...
1
vote
1
answer
39
views
What kind of 13.56 MHz NFC cards are there?
EDIT: when mentioning "cards" in the question below, I mean the kind of badges/cards you can but at Aliexpress that claim to be "magic" cards (or that ndo not claim anything and ...
- 805
1
vote
1
answer
55
views
How do I control a device that works with Z-Wave JS UI via a published MQTT message?
I have a setup where I am running a simple mosquito server for MQTT. I then run the Z-Wave JS ui project to interact with my zwave devices. This works great and I see the messages showing up in MQTT ...
- 111
2
votes
0
answers
31
views
Transforming Semtech LR1110's NAV message (GNSS data) to location information?
If I have Digital Matter's Yabby Edge Cellular devices and would be interested in knowing and reporting their locations, is there any sensible way to achieve that other than using Digital Matter's ...
- 121
2
votes
0
answers
46
views
Is there a cheap satellite modem for IoT?
I just want M2M data transmission, low rate is ok, latency is not a major problem.
I am talking anything from a few kB to a few mB of data per device, per day, and have no problem with latency of a ...
1
vote
1
answer
23
views
aeotec aërQ temp/rh sensor or zwave-js not reporting state change
I have a simple iot app:
raspberry pi 4
aeotec Z-stick7
aeotec aërQ temp/humidity sensor
mosquitto
zwave-js-ui
The setup works fine, yet state changes are not being reported so often.
Yesterday ...
- 163
1
vote
0
answers
21
views
How can I mitigate my energy monitor losing its accumulated totals?
I recently added a power monitor to our homelab, flashed it with ESPHome and configured some mini-graph-cards to visualise power and energy use. Everything looked good, until I started to see frequent,...
- 111
1
vote
1
answer
49
views
If hackers get ahold of your physical IoT device, what's the purpose of using secure/crypto-chips?
Trying to design some secure firmware here and running into a brick wall regarding the use of crypto-chips. We are considering using this one here: https://www.microchip.com/en-us/product/ATECC608B. ...
- 113
2
votes
0
answers
30
views
AWS security certificates with Shelly smart plug
When creating a "Thing" in "IoT Core" AWS let me download 5 security related files:
Device certificate: ???-certificate.pem.crt
Public key file: ???-public.pem.key
Private key ...
- 21
1
vote
1
answer
42
views
Flashing Athom Wall plug ESP8285
I'm trying to re-flash an Athom plug (bought pre-flashed with HomeKit firmware) using FTDI adapter.
Shown here is the exact ESP8285 (different plug sub-model). AFAIK ESP8285 is a similar MCU to ...
- 771
2
votes
2
answers
26
views
How can you send data(via cellular) from a arduino to a server?
I'm pretty new to IoT so forgive the basic questions, but I need to send data from an Arduino that is constantly collecting sensor data to a home server.
I wanted to know where to start with this ...
- 21
0
votes
0
answers
37
views
Sending data to server every second with http-request
I'm sending few bytes of sensor data to server with http.POST every minute and it's working. Next I want to send 20 bytes every second with http.POST. I was told server would take that as an attack ...
- 21
2
votes
1
answer
56
views
Matter for pre-certification use
I'm developing a Smart Home product (Wi-Fi Only), in which all cloud-based communication is done, and LAN-eabled communication with our intended mobile application is done.
An upcoming feature is the ...
- 41
0
votes
0
answers
34
views
ANT+ bicycle shifting bypass
I have electronic shifting on bike and I want to bypass it with my computer. So now, the network topology is:
controller <--> derailleur
and I want it to be:
controller --> PC with ANT+ usb ...
- 1
0
votes
0
answers
22
views
Raspberry Pi 3 kubernetes face recognition cluster
I need an advice whether this system is possible the way I planned to implement it. I got a project to build a kubernetes cluster for face recognition using raspberry pi 3 devices. The idea is to have ...
1
vote
1
answer
38
views
TLS Certificate life for IoT System
I'm developing an IoT product's software, where it runs HTTPS client.
Given that the certificate of servers are renewed every year, it's not that issue while we're authenticating against the ...
- 41
0
votes
0
answers
24
views
How to reconnect to Google Home devices after signing out?
My wife was concerned that she had a virus on her PC. Out of an abundance of caution, she used the "sign out of all my devices" option in Google Home on her laptop.
The devices (Nest ...
- 101
0
votes
1
answer
33
views
Arduino LoRa communication protocol
I am fairly new to IoT and to all kinds of Arduino chips/sensors etc.. I am trying to understand the mechanism of LoRa device communication. With the help of the official Arduino web page I found the ...
- 103
0
votes
0
answers
46
views
Malformed Packet on Mosquitto
I am trying to connect to my mosquitto broker on esp32 with GSM using pubsubclient but sometimes it disconnect to broker with detail malformed packet.
2023-08-30T13:43:14: Client client_id ...
1
vote
1
answer
48
views
Send Alexa a command from another device?
I'm in the process of creating a Raspberry Pi-powered home automation system. I have a complicated node.js script running on the Pi, and I want to be able to send commands from the Pi to my Alexa (e.g....
- 113
0
votes
0
answers
46
views
Serialization scheme to adopt for a system
I'm designing an IoT system, and seeking to adopt a serialization scheme for communications across the entities (Cloud to Device communication, Local Communication,...) taken into consideration some ...
- 41
1
vote
1
answer
47
views
LED ceiling panels: driver with alexa/home automation capabilities
I have 3 LED ceiling lamps, unfortunately they're using some proprietary protocols for communication. The chip used in remote is PL51WT020:
PL51WZ020 (PMicro website)
Is there a way to control the ...
- 11
0
votes
0
answers
29
views
Private ip in raspberry pi?
I have a Raspberry pi 4 that is connected to a therm sensor ds18b20. The Raspberry Pi is running a flask application in 0.0.0.0 in port 5000, the app gives the current temperature using the sensor ...
1
vote
1
answer
46
views
Is It Possible to Use LG's ThinQ Without Internet Access
For obvious reason's I do not want my home appliances to be on the Internet. It boggles the mind why manufactures think this is okay, and even more boggling that people seem to accept it.
Anyway...
...
- 11
1
vote
1
answer
40
views
What does this Amazon echo light indicator mean?
My echo keeps showing this indicator. It goes on for a long while, stops some time later, but then I notice it's happening again.
- 111
0
votes
0
answers
17
views
incorrect values in array in node-red
I am new to Node-Red and I need to create a small system where three input values of the power phase need to be summed. For this, I am using the "join" node to create an array. But the ...
- 1
0
votes
0
answers
36
views
Uploading Tasmota to Water Heater
I wish to use a new smart water heater with Tasmota.
MCU is TYWE3S, and it has a ready made tutorial which was carried out as planned. Installation succeeded..
BUT after flahing and assmbling it all ...
- 771
0
votes
0
answers
33
views
How do I detect button presses from a ble device?
I've been working on an app in flutter that connects to a ble device and responds to button presses from the device. I've tried various packages and frameworks and none works. I decided to try nrf ...
1
vote
1
answer
283
views
Best practice way to deal with SIM cards and APNs
In my application there is a 2g/4g modem that I control via AT commands.
In general, what is the approach to knowing what APN to specify when setting up a context? I'm trying to avoid hardcoding (or ...
- 111
0
votes
1
answer
33
views
Possible reasons why my Alexa turns on the wrong light
We have multiple IoT devices at home. For this explanation, we're concerned about the bedroom lights and kitchen lights. I have two Alexa devices, the main one is in the kitchen (Echo Show) and the ...
- 101
1
vote
0
answers
10
views
Non Windows based approach to parameterize KNX devices
I was looking for ways to parameterize KNX devices, and could only find the ETS Software which requires a working Windows installation.
Are there more options?
- 111
1
vote
2
answers
52
views
MQTT not connecting to local broker
I am really new to IoT and MQTT. For my project I want ESP32 to send data to node-red as a part of visualization requirement. I am running a broker (mosquitto) locally on my PC (Windows 11), I ...
- 11
1
vote
1
answer
63
views
request plate number from Tattile camera
I am using a Tattile camera with ANPR and trying to use it with customized SW following ANPR_DeveloperGuide_E.pdf.
I managed to access all functionality (getting data, setting data, requests including ...
- 11
0
votes
1
answer
18
views
Zigbee network - Joining several brands to a network
I'm new to Zigbee, and I iwsh to create a Zigbee network.
I bought a Sonoff Zigbee dongle to connect it to a Home Assistant (on raspberryPi), and now I want to buy Zigbee devices.
How can I tell if an ...
- 771
0
votes
0
answers
28
views
Athom - flashing your own firmware
I've bought Athom's Curtain and 4 gang touch wall switch. Both came pre-flashed with Tasmota. I guessed that UART's pins will be exposed more clrealy, but not. I'm looking for manuals such guide, or ...
- 771
0
votes
1
answer
16
views
What is the difference between using CreateCertificateFromCsr and CreateKeysAndCertificate?
When doing fleet registration of IoT devices on AWS' IoT, what is the difference between using
CreateCertificateFromCsr and CreateKeysAndCertificate? They seem similar enough to where both are not ...
- 103
0
votes
0
answers
25
views
Use HomeLink button in car to toggle light controlled by smart switch
A few months ago, I bought a 2023 Honda Civic with built-in trio of HomeLink buttons.
I don't have a garage, but I do have a front porch light I'd love to be able to toggle on and off from inside the ...
- 101
0
votes
0
answers
30
views
Small switch to power something off or on
I need a remotely controllable switch to power my ventilation off and on. So it should switch 220V off/on, and it should be small because the available space is 80mmx54mmx21mm.
My homematic switch ...
- 123
-1
votes
1
answer
30
views
How to build a roll call IoT app?
I've brainstormed an idea for an IoT hobby project but don't know exactly where to start in terms of the implementation. Here's the idea. 10 of my friends who live <.5 mile radius of my house like ...
- 3
0
votes
0
answers
7
views
Verification of CMAC
How to Verify CMAC in install for install command in javacard..
I used the process given below but this method not able to verify
Key = Session Key for CMAC,
IV = CMAC which is given in external ...
0
votes
0
answers
18
views
Why xargs cannnot receive input parameters through pipe?
Ubuntu 20.04 LTS Shell
1.
mosquitto_sub -h 192.168.1.3 -t "application/2/device/df9cde4119c814ef/rx" -v
application/2/device/df9cde4119c814ef/rx {"applicationID":"2",&...
- 1
0
votes
0
answers
11
views
How to include a timer in a nightly routine for lights?
The use case I'm trying to solve is that after dinner our early teenage kids keep coming into the kitchen and leaving the light on.
We moved into our current home in January and have a collection of ...
- 101
0
votes
0
answers
26
views
No router device sees my ethernet cable, but all my endpoint devices see it
This is a weird one. I live in a very remote area with no wired internet options, so I have set up a 4G router about 75 meters from the house in a spot where 4G reception is good enough. I'm running a ...
- 101