Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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Mosquitto broker stopped working in Hassio

My Mosquitto broker stopped working and I think it might have something to do with me trying to use the same Raspberry Pi to run Tuya Convert. I know Tuya Convert installs a bunch of stuff and I'm guessing one of those screwed my MQTT Broker,…
Jorge Anzola
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Board to act as a hotspot and connect to Internet

Please excuse the very vague title, I had no idea how to condense my question into a title. Unit A - ESP32 Unit B - what I am looking for HOME_WIFI - The wifi network broadcasted within my home. UNIT_B_WIFI - The wifi broadcasted by Unit B for Unit…
97WaterPolo
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Simple two-sensor digital thermometer with an alert when the temperatures match?

Where I live, it gets hot in the summer (but usually not so hot that I need AC on), but the nights usually cool down to a beautifully cool temperature. I like to open windows when it gets cooler outside in the evening, and shut them when it starts…
Sandwich
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Can Raspberry Pi be used instead of Google Nest as a hub to control my smart home via Google Assistant?

I am searching for a way to make my home "smart". I have raspberry pi 4 and pixel 2 phone. I thought that it would be cool to make my dumb devices "smart" and control them via Google Assistant from Pixel phone. I stumbled upon this picture (source)…
warchantua
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Using mosquitto_pub WITH mosquitto_sub on AWS IoT thing is not working

Strange problem when trying to interact with an AWS IoT thing using the mosquitto CLI clients: mosquitto_pub works as I can see the incoming message in the AWS IoT Test console. mosquitto_sub works as I can receive messages sent from the AWS IoT…
Mrtn
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How to save more than one line in SD card memory

I am trying to store certain text in SC Card memory, but the SD Card save the last line or it does not work at all I'm working with ESP32 microcontroller this is my code #include #include File myFile; int i=0; …
saja wahidee
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Ikea Tradfri Gateway don't connect to a network

I connect my Ikea Tradfri to a router. All three lights are on, but the App can't found the gateway. I use an IP scanner on my Mac, and I can't found Gateway. The app suggested that if I am sure that Gateway is connected to the same network (and it…
Marko Zadravec
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ESP32 always high pins screwing analog measure

TL;DR When trying to use some pins of my ESP32 to read analog signals, it turns out those pins have a non-zero voltage, messing up the measurements. Why? I got myself an Olimex ESP32-POE-ISO (see specs) to run the irrigation of my garden. I am…
ErosC
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Using zigbee devices as repeaters without a hub

I want to use a Spruce smart irrigation controller (it connects to wifi through 2.4ghz) with a Spruce soil moisture sensor (connects to the controller via zigbee). The sensor needs to be a bit far away from the controller with several walls and…
jdoc
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Is there an out-of-the-box solution for PWM controlling?

I need to ventilate a room because of my Resin printers. I have a discarded kitchen extractor hood with an EBM fan in it. It takes 10v PWM to control the speed. And the lights have a driver. To control the lights I can use a cheap Sonoff wifi…
jojonl
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High data usage on a raspberry IOT

I have notice a signification data usage on my pi even when I am not using it. this can be a problem as I am using a IOT sim card with a small cap. I have setup iftop and monitored the traffic for a couple hours. here are few of the connections my…
Ghost X
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Separate shopping list on Alexa

I share a Amazon prime account with another and we each have an Echo. Each Echo is setup with our respective accounts. When we ask Alexa to add something to our shopping list, both Echo's write to the same list. I know we can create separate lists…
user12166
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ESP IDF Data backup to NVS when power goes off

I am using esp-IDF library and esp32 for smart lighting. I want to maintain the state of the lights when power goes off as it can be written somewhere in NVS. Such implementation is available for arduino boards. When I’m trying to do the same for…
Learner
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Creating a secure MQTT session with TLS while employing smartphone gateway

My IoT device creates a BLE connection with a smartphone from which it connects to cloud. When integrating a TLS, should it be above MQTT or below? All implementation I have reviewed so far does it below MQTT layer. Above: TLS handshake and record…
RealTimeEngineer91
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Unable to publish MQTT server in an infinite while loop in Python script

I'm curious to know what the performance of an MQTT server is like. So I created this Python script: import time import paho.mqtt.client as mqtt from multiprocessing import Pool def on_connect(client, userdata, flags, rc): print("Connected…
learningtech
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