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#mqtt

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StargapOct 14 · 2 min read

Why an MQTT value can go from 22 back to 21 after reconnecting

A subscriber receives 22. Reconnect it, and 21 appears again. Before changing a sensor or a dashboard, check which value the broker retained. In a local test with Mosquitto and AirMQTT in an iPhone si

stargap.hashnode.dev

Abdul GhaniOct 14 · 10 min read

Building a Mac menu bar app for my Panasonic AC: MQTT, a Wi-Fi mystery and shipping outside the App Store

I have Panasonic air conditioners at home that can only be controlled two ways: a remote that is never where I left it, or the MirAIe app on my phone. I spend most of my day on a Mac, so I wanted the

blog.abdulghani.tech

circuitrocksOct 13 · 2 min read

Turn Escape Room Puzzles into Home Assistant Devices with ESP32

Grab an ESP32 dev board, a PCF8574 I2C expander, a few buttons or reed switches, and a laptop running Home Assistant with an MQTT broker. That is enough parts to make a puzzle prop report its state to

circuitrocks.hashnode.dev

circuitrocksSep 27 · 3 min read

IronEar's ESP32-S3 Sensor Hears 500 Sounds, Skips the Camera

A camera watching your backyard only sees what's in its cone of view, and every camera you bolt on is another privacy trade-off. IronEar takes the opposite bet: three tiny microphones and a neural net

circuitrocks.hashnode.dev

circuitrocksSep 8 · 3 min read

warecache Sensor Bins Count Your Parts Using an STM32H723

Counting 220-ohm resistors by hand is the part of workshop life nobody misses. To automate it you need three things: a bin that weighs its own contents, a controller that can poll dozens of those bins

circuitrocks.hashnode.dev

Sanskriti HarmukhSep 3 · 4 min read

Installing Mosquitto MQTT Broker on Ubuntu 24.04

Mosquitto is an open-source message broker implementing the MQTT (Message Queuing Telemetry Transport) protocol — a lightweight TCP/IP messaging platform built for IoT devices with minimal resources,

vultr.hashnode.dev

Yogeshwar PeelaAug 18 · 5 min read

TryHackMe : Bugged - Writeup

Overview Bugged is an easy TryHackMe box built around an MQTT broker (Mosquitto) that allows anonymous connections. The broker exposes normal-looking IoT device telemetry alongside a hidden backdoor t

exploitnotes.hashnode.dev

ronie josephJul 28 · 5 min read

Building a UNS with Open-Source: HiveMQ, Sparkplug B, and Node-RED

In Part 1, we established why the Unified Namespace replaces point-to-point integration spaghetti. But a UNS is an architectural concept. To make it real on a factory floor, you need actual software.

roniejoseph.hashnode.dev

ronie josephJul 23 · 5 min read

The End of Point-to-Point: Why the Unified Namespace Is the Foundation of Agentic Manufacturing

Every new machine you integrate into a production line adds another custom script, another proprietary connection, another point of failure. Multiply that across hundreds of assets in a hyperscale fac

3 roniejoseph.hashnode.dev

RobustelJul 1 · 6 min read

Modbus to MQTT at the Edge: Turning PLC Data into Cloud-Ready Industrial IoT Data

Why Modbus-to-MQTT matters in brownfield factories Many factories already have valuable data on the shop floor. It may come from PLCs, meters, sensors, drives, machine controllers, or older equipment

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Trending tags this week

Why an MQTT value can go from 22 back to 21 after reconnecting

Building a Mac menu bar app for my Panasonic AC: MQTT, a Wi-Fi mystery and shipping outside the App Store

Turn Escape Room Puzzles into Home Assistant Devices with ESP32

IronEar's ESP32-S3 Sensor Hears 500 Sounds, Skips the Camera

warecache Sensor Bins Count Your Parts Using an STM32H723

Installing Mosquitto MQTT Broker on Ubuntu 24.04

TryHackMe : Bugged - Writeup

Building a UNS with Open-Source: HiveMQ, Sparkplug B, and Node-RED

The End of Point-to-Point: Why the Unified Namespace Is the Foundation of Agentic Manufacturing

Modbus to MQTT at the Edge: Turning PLC Data into Cloud-Ready Industrial IoT Data