Internet of Things Stack Exchange
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1500 questions
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2 answers

Connecting Shelly i4 into existing circuit

I'm trying to connect a Shelly Plus i4 into an existing circuit by replacing a wall-switch. Getting it in there was no problem, but everything getting power is. Having it wired according to the diagram, the Shelly i4 shows up and can be configured.…
rkeet
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If device is on, turn it off (and vice versa) | Multi-Step Routines | Alexa

How to run an Alexa routine that checks the current status of a device, and changes it? Example: If LivingRoomLamp is on Then turn off LivingRoomLamp If LivingRoomLamp is off Then turn on LivingRoomLamp The routine will be called via an external…
Greenreader9
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How to account for variation in sensors across multiple devices?

I am working on installing 5 sensors around a workshop to measure the mass of different storage boxes. I wish to use the same codebase to record and log all the data from each sensor setup. One issue I am running into is how to account for different…
conomor
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LoPy4 MQTT Example does not Work

I have two LoPy4 Dev boards. I am using this tutorial in order to (successfully) communicate with the two boards. After receiving data in LoRa communication I am trying to also publish this data in an MQTT Broker. I have followed the related MQTT…
Ioan Kats
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1 answer

Tasmota WebQuery rule not reaching URL despite logging "performs WebQuery" (with Command: Unknown)

I have added rule to my tasmota sonoff light switch (typing in console web interface): Rule1 ON POWER2#state==1 DO WebQuery http://192.168.0.106/input.php GET ENDON The output from console: 11:51:24 CMD: Rule1 ON POWER2#state==1 DO WebQuery…
PolGraphic
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PTZ Security Camera Stuck in a Tour

I have an outdoor PTZ Dome Camera of unknown manufacturer but it has a type number sticker saying, NG4RT-42718. It came with CMS V3.1.0.8 software. This seemed to drive the camera adequately until I set up a "Tour", ie. sequentially cycle through a…
Sabreur
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1 answer

How to make Amazon Echo device to control devices in the same room with the same name?

I have two Amazon Echo devices installed in two rooms. I have created groups and added devices of the rooms to their respective groups. But I have some devices with the same name. For example, I have two devices named Light, one in the bedroom and…
Debiprasad
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2 answers

ESP32 UART reads garbage

Well, I have no experience with ESP32 UART, tried it and failed. In brief: I need to implement a data exchange between ESP32 and external module via UART. And at some point I need to read the data from the external module, but have a garbage…
BUKTOP
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Certificate Management for IOT devices

What is the best practice for certificate management on an IOT device (bare metal microcontroller with GSM modem that communicates to a secured MQTT broker)? Looking at Let's Encrypt certbot, they have 90 day expiry, then the certs should be…
newbie programmerz
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How to control homework writting machine with IOT

It consists of (CNCsheild, Arduino UNO, 2-stepper motors and servo motor), It works with GRBL Plotter and Inkscape. I am new at learning IOT. I want to know what is the needed components and software that I should add to control the motors.
Salma
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ESP32 or ESP8266 220v button as input

As per title I'm, looking a way to detect the press of a button powered at 220v ac through a gpio pin of the ESP32. The simplest solution found seems to be an octocoupler, but are there devices that support such a high voltage difference? What could…
Stefano
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Does iPhone 11 device contain multiple UWB receivers?

Does iPhone 11 device contain multiple UWB receivers? Angle of Arrival (AoA) is often required for many applications for UWB enabled devices. I wonder if modern UWB enabled devices i.e. iPhone 11 contain multiple UWB receivers to support AoA or not?
Sazzad Hissain Khan
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How to connect several sensor boxes (ESP32) via WIFI/webserver/...?

I'm intending to create some (like 5-10) boxes with sensors and/or relays inside using ESP32's. For connection to a laptop and mobile phone I found a tutorial at ESP32 WebSocket Server: Control Outputs (Arduino IDE) which uses an async webserver…
Michel Keijzers
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1 answer

Make connection between react native & raspberry & MQTT

I am currently making an IoT App that I'm trying to connect to a Raspberry Pi using MQTT. I use the react_native_mqtt package. The problem I have is that it doesn't connect. What I'm trying to achieve is to receive data from the rasp and use that…
Kindth
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Minimum IoT scope? Example: Is a car an IoT already by itself?

A car can be considered a "thing" in an Internet of Things. It does provide operational data to its manufacturer, is able to do emergency calls, can receive remote updates, etc. Looking at the car "thing" more in detail however, it itself is…
0laf
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