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0answers
18 views

Node-red running on DietPi show gpio nodes as not available

So this, running the latest DietPi (DietPi_RPi-ARMv6-Bullseye) on Raspberry Pi zero W and using node-red-node-pi-gpio to talk to hardware. However after deployment I see this: RPi.GPIO python library ...
0
votes
2answers
21 views

The impact of LoRaWAN repeated transmissions

The LoRaWAN spec defines the LinkADRReq MAC command with a field (NbTrans) specifying the number of requested repeated transmissions of every frame. Actility claims that their ADRv3 algorythm uses ...
0
votes
1answer
14 views

Getting no value from Gravity TDS sensor (analog pin)

I'm using this ESP32 model (picture) with Expressif's DOIT ESP32 Dev 1 library for esp32. And I was trying to use Gravity TDS sensor with DFRobot Gravity library. I set my Analog pin from A1 (Arduino) ...
1
vote
0answers
15 views

How to upload new firmware to Ralink RT5350F board

I took apart old Edimax SmartPlug (model SP-1101W) to find out that the brain of the device is Ralink RT5350F chip conviniently placed on removable module board: The board has two rows of 14 pins (28 ...
0
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0answers
10 views

Demodulation and RFID Readers

I was wondering if anyone had an inclination of demodulation and packets regarding RFID chips, sensors, and tags. When working with RF signals, and using a reader the device is capable of collecting ...
0
votes
0answers
14 views

Controlling Alexa Group with Smart Switch

I recently installed a Gosund smart switch for my living room lights. The smart switch works great for turning on and off the outlet that's connected to the switch, and I can tell Alexa to turn it on ...
1
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0answers
25 views

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 ...
0
votes
1answer
25 views

Which radio technology for long distance, high(er) power, IP traffic?

I'm looking to build a long distance IP star network using one of the IoT PHY layers but unsure if LoRa is right. An ideal solution would be something to the effect of 915Mhz WiFi or WiFi HaLow ...
0
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0answers
21 views

Can I upload 2 code files to a NodeMCU

I have a NodeMCU board. I uploaded blink example for that board and I need to add another example project from the IDE. What happens to the 1st code example or blink example when 2nd code uploaded. Is ...
1
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0answers
20 views

Connecting to scanner on tp-links' isp server [migrated]

Goodday all, I have a tp-link router setup as local network with my home router as isp. I frequently abuse this local network for testing hence why I want to keep it separate from the home-network. It ...
0
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0answers
26 views

Automate radiators per room - With motion/presense sensing [closed]

With about ten people we rent a building. We pay thousands and thousands of Euro's each year for gas for heating. The building has one thermostat which switches all rooms. So, if one person goes to ...
1
vote
1answer
13 views

4-Channel 16-Bit ADC for Raspberry Pi (ADS1115) - Can I connect two analog sensors?

I have a RP4 and thinking about buying EC and PH sensors from Grove. I've learned that RP4 doesn't have an analog input so I'm thinking about connecting it through ADS1115 from Grove. I'm not sure ...
1
vote
1answer
27 views

Location Solver with LoRaWAN trackers

We use Abeeway Compact Trackers connected via a ThingPark powered LoRaWAN network to track pallets. Our Application Server receives and decodes messages and stores the location coordinates in a DB so ...
1
vote
1answer
23 views

LoRaWAN end-to-end security with Over The Air Activation

We are planning to connect several thousands of door opening and other home security sensors to a public LoRaWAN network country-wide, but our concern is, that in theory our public LoRaWAN network ...
2
votes
1answer
34 views

Firmware update over a LoRaWAN network

We are planning to connect several thousands of LoRaWAN connected water meters. The expected battery life time is 8+ years. Our concern is that meter suppliers are releasing new firmware version ...
2
votes
1answer
22 views

LoRaWAN roaming for overlapping networks

Why shall we consider having a LoRaWAN roaming agreement with another LoRaWAN network operator that has partly overlapping network coverage with our network? Our end devices are fixed (e.g.: water ...
0
votes
1answer
29 views

Can I make individual callbacks to handle each MQTT topic?

I'm using the PubSubClient on some ESP-01 modules to make smart/connected devices around the house. I'm not super fond of the way all incoming messages get routed to the single callback. When I get a ...
0
votes
1answer
30 views

How can I identify what kind of IoT device is in my network?

I am trying to build a system in which IoT devices can connect and are classified without the need for manual checks by the system administrator. In this system, IoT devices will send data, and on the ...
2
votes
1answer
49 views

LoRa inventory application

As far as I know there is no smartphone with Lora builtin compatibility. I'm looking if I can build a inventory solution based on LoRa. Until today the solution was to use the NarrowBand (deprecated ...
0
votes
1answer
24 views

Is there an equivalent to the rsync toolset/protocol for the IoT world

Is rsync suitable for IoT devices to move data from and to the cloud? Is there an equivalent for devices that have an unreliable connection?
-1
votes
2answers
52 views

Building a string (or char) array - newbie

I pretty new to this and have only been doing it for a few week. Although I have programmed in other languages my understanding of declaring the types, converting types and pointers is still pretty ...
0
votes
1answer
38 views

Looking to automate 2 pool pumps and 1 heater [closed]

So this has been asked here a few times before but I was hoping for some additional wiring help. I have 2 phase 240 VAC connection going to my pool equipment (4 wires) and would like to run the ...
1
vote
1answer
31 views

Publish MQTT message via HTTP GET

I need to make a simple proof of concept, having an Arduino or ESP32 with a couple of LEDs than can be turned on/off via browser. There are a lot of examples about having a small server in the Arduino ...
2
votes
1answer
36 views

MQTT disconnects from AWS when publishing a message

Please look at this sketch for ESP32. It does nothing but: connects to WiFi connects to AWS MQTT subscribes to the /get/accepted topic every 5 s publish an empty message to the /get topic to retrieve ...
0
votes
0answers
24 views

"Open" home security systems

Is there a security system that allows input signals from different providers / systems and aggregates them? For example, it can use presence / motion sensors coming from ecobee and echo flex, ring ...
3
votes
0answers
69 views

Create Google voice command without IFTTT

Problem I'm trying to extend my own application to use the Google Assistant (in my situation Google Nest Hub device) and is able to control my home custom-made devices like turn on/off light, lock ...
3
votes
0answers
34 views

What commands should I send to Tasmota (DHT11) via MQTT Broker to receive status as message in my NodeJS script?

I cannot find how to send command to my Tasmota DHT11 device via MQTT Broker. I'm using mqtt.js library in Nodejs. var mqtt = require('mqtt'); var topic = 'cmnd/tasmota_E30D62/'; var client = mqtt....
2
votes
2answers
425 views

Why arp -a does not show all devices connected to WIFI? [closed]

I am trying to see the IPs of all the devices connected to my WIFI. Everyone suggests to use the command arp -a in the terminal but when I do so I get always the same list of devices. I try to connect ...
0
votes
1answer
56 views

(Re)Joining existing Lora-wan end-devices to another network server

We are moving our Lora-wan gateways and end-device from Loriot to another opensource network server. But we are experiencing problems with some of our devices, when trying to rejoin using OTAA. What ...
0
votes
1answer
56 views

How does a smartwatch detect the worn handedness?

How does a smartwatch detect the worn handedness? I have googled, but I could not find any valuable information on the query. What is/are the hardware(s) and/or algorithm(s) smartwatches use to detect ...
0
votes
1answer
60 views

Why MQTT protocol is better than Websocket or direct TCP socket for live data IoT? [closed]

We know MQTT is based on TCP. Why don't we directly using plain TCP connection for live data? Recently I'm using plain TCP for realtime / live connection for transfer sensor data to another device ...
0
votes
0answers
40 views

How to capture Ultrasonic Cross-Device Tracking signals?

I found out that many devices as PCs, TVs, cellphones and more can use a technology called ultrasonic cross-device tracking. This means that there are ultrahigh sound frequencies which propagate from ...
2
votes
3answers
47 views

Do two way communication smart ZigBee switches exist?

Previously posted on Home Improvement however it received no responses. I have "smart" ZigBee lightbulbs throughout my home, as we like being able to change their colour using Alexa. I also ...
3
votes
1answer
69 views

How to do directional finding with Bluetooth and UWB

Just jumped into the ocean of IoT and found myself drowning.... I am trying to make my small toy car(with remote) being able to follow me. Have discussed with my hardware friend and was told to get ...
2
votes
0answers
70 views

Unpack hex data for IoT application Python [closed]

So an IoT device that I am currently using stores payloads as a base64 string. this payload along with other data is stored in a .json file which is then transferred to a MQTT broker. The broker then ...
2
votes
1answer
56 views

Is Google Cloud Platform a broker?

I am trying to develop an windows form application on Visual Studio to control a home automation system. I am looking into the MQTT protocol to communicate between an application AMD hardware (using ...
3
votes
0answers
23 views

FIWARE: NGSI-compatible sensors for IoT data gathering [closed]

I am preparing to conduct a research for IoT, collecting environmental data from different sources (temperature, humidity, light, air quality, GPS, etc...). What could the best set of tools or ...
3
votes
0answers
53 views

How to enable a device to follow you?

I am trying to find out what IoT devices I shall use to enable an device(say a small toy car) to have a ability to follow a particular person. So far what I have found: QR Code, print out the QR code ...
0
votes
0answers
71 views

Master selection process in an network

I am working on designing a dynamic system that contains some edge devices lets say 100 for the moment out of which one device has to be the master, that has some different task. So I have searched a ...
1
vote
0answers
32 views

Home Security professional service: What does "3rd party device integration" mean?

Doing research on professional monitoring services (in the US), some/many services claim 3rd party devices can be connected to their service. But it's unclear to me what level of functionality from ...
2
votes
1answer
33 views

Monitor plug socket remote from desktop PC

Planning a one off party event that involves turning mains lights on/off and then playing media on a PC connected screen. It need not be very fast and doesn't need to use internet but WiFi is ...
7
votes
2answers
116 views

Searching local MQTT server on Local network

I have a micro-controller,ESP8266 for the moment, which is connecting to a mqtt broker and pulish some messages. I have configured mqtt broker on raspberry pi which has an IP address 192.168.43.164. ...
0
votes
1answer
43 views

Azure Service leverage IoT solution

We are working with an OBD-II device that we have directly bought from the manufacturer and want to create a platform for it. 80K+ devices will be used per year. The OBD-II device collects car ...
2
votes
0answers
37 views

Using Alexa as speaker over LAN

I would like to use my Alexa as a speaker for my (windows)PC. My PC doesn't have Bluetooth and Alexa is not directly connected to my PC. Since the Alexa is connected to the same router (via WiFi) as ...
2
votes
0answers
12 views

Using NodeJS to create custom Google Assistant triggers

I am creating a storage system where I'd like to have triggers as: Ok Google, Add 5 blue papers to paper box Ok google, Find blue papers Ok google, take 2 blue papers Basically custom triggers ...
4
votes
2answers
123 views

How to make a MQTT Broker and a REST API communicate?

I'm still very new to IoT and IoT protocols, so pardon my ignorance. I'm trying to go about creating a home automation system to control lights, read room temperatures etc. The user should be able to ...
1
vote
1answer
21 views

Why would MKR GSM stop transmitting data to IOT cloud after a certain amount of time transmitting fine?

The device connects to IOT cloud fine and transmits the data for days and sometimes even weeks, but then it will stop transmitting for apparently no reason. On the IOT cloud dashboard the device is ...
2
votes
1answer
31 views

Trying to read thermostat value controlled by Alexa with ESP8266

this is my situation: I have a thermostat in my bathroom which is controlled by Alexa. Now I want to automate my ventilation. For this I want to use a ESP8266 NodeMCU with a humidity sensor and a ...
1
vote
0answers
33 views

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 ...
1
vote
0answers
28 views

Should I make a custom bootloader? [closed]

I'm on a project where I'll use a BLE chip and I saw I can craft a custom bootloader. I don't think I'll need to make a custom one because it's just going to be a bridge to other chips (but aren't all ...

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