Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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Query regarding setting ESP32 eFuses for restricting USB firmware access

I am currently working on a project where I need to restrict the ability to read and write firmware through the USB interface on the ESP32. To achieve this, I have attempted to set the following eFuses for experimentation purposes: UART_DOWNLOAD_DIS…
Hamza Abbasi
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Paho MQTT Client - on_message callback never happens

I have a Mosquitto MQTT broker (mosquitto version 2.0.11) running on a Raspberry Pi. It is publishing regular messages on a specific topic, which can be seen by running $ mosquitto_sub -h 192.168.27.177 -d -t HouseMon -t notification from another…
tim11g
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Unable to run micropython on ESP32-WROOM

I just took delivery of a trio of ESP32-WROOM-32 dev boards and am unable to get micropython to run on them. I've successfully flashed sketches from the Arduino IDE, but after I flash the latest esp32spiram.bin and try to connect with Thonny, I see…
Darwin von Corax
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How to setup “my” AC on Alexa?

So I setup Alexa with multiple smart home ACs, one in my room and another in the guest room. I’ve given the name as Guest Room AC for that, and mine is Mohsin’s AC. But when I come home and say “Alexa, turn on my AC”, it turns on the guest room AC.…
Saifur Rahman Mohsin
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1 answer

What IoT software/web-services can be used to implement the basic "IoT device->Database ->Frontend" architecture?

I'm looking for the simplest (i.e least components) way to create the data logging/visualization system with the following architecture: IoT Data (Plaintext HTTP POST) -> Database+data processing backend -> Web-based frontend Currently, my…
Noideas
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compute power for MQTT vs HTTP POST in cloud

Trying to get an understanding of the cloud side compute power comparison (and cost) for say 10,000 devices sending data to the cloud using HTTPS Vs MQTT. My co-worker says keeping 10k MQTT connections alive would eclipse the cost of having the same…
BAO
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Circuit python express loads boot mode but doesn't flash .uf2

I'm having some trouble flashing CircuitPython to my Circuit Python Express. I successfully enter boot mode (LEDs are all green and red D13 light slowly blinking) but I can't flash anything. When I drag and drop a .uf2 file, there's no response even…
hvnova
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Matter recommended SoCs

I'm working on climate control smart home thingy. The setup includes ~100 sensors and ~20 relays, currently operated by a python program on a Raspberry Pi, communicating over BLE with ESP32 boards that are connected to sensors/relays. I want to make…
Erez Segal
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Detect bad air quality because of burned firewood

In my neighbourhood people burn a lot of firewood. I always deactivate my automatic ventilation when I smell it, but I would like to have something better. Are there sensors to detect this?
J Fabian Meier
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iRobot vacuum cleaner wakes me up in the middle of the night because it starts vacuuming or annoying me with voice messages

I have two iRobot products Roomba e5 Braava jet m6 Both are connected to WLAN (but internet access is blocked) and I have the iRobot app on my iPhone. With "Braava jet m6" I have never had problems with it starting to emit audio messages on its…
Sybil
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Vernemq loses all messages after pod restart, even with persistent storage

We're running a cluster with 2 VerneMq brokers. Everything works fine if we start one broker at one time, but as soon as we need to re-start both the brokers, all the retained messages are lost. To fix the issue, we tried configuring persistent…
Logan
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How to see when the washing with Bosch dishwasher is over?

I have SMV25CX03R Bosch dishwasher. It is not easy to control when the washing is over. This is built-in machine, so all LEDs and buttons are hidden when the door is closed. I am thinking about a way to be able to see it remotely. The following…
LA_
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Connecting cellular module SIM7070G to AWS MQTT

I have troubles connecting SIM7070G (SIM7000 family) to AWS over built-in MQTT using AWS certificates. I've succeeded previously using the module only as a cellular gateway, but running FreeRTOS+mbedTLS on Windows simulator, however now trying to…
Tomas D.
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Listing of MicroBit.h for V1 micro:bit?

I'm looking for a listing of the Microbit.h header file for V1 microbits. (Trying to understand a C++ program for controlling the ADC). I've been able to find the V2 version, but not V1.
keble
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5 answers

Getting telemetry from Solax Inverter Pocket WIFI

I'm trying to get telemetry from my Solax hybrid inverter which has a "Pocket WIFI" device installed without the information going across the internet (its my data, its sent unencrypted and stored in a country whose values I do not share, and also…
davidgo
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