Getting Started with MetricMQ with no hardware

28 May 2026 in Blog / Embedded Software , Tags: C++

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About

I’m a software engineer working primarily in embedded systems and firmware, with experience spanning resource-constrained devices, embedded Linux, and desktop applications. I hold an MSc in Embedded Systems from Kingston University, London, UK with management studies as my minor subject, this educational experience has shaped how I approach engineering decisions beyond just code.

I use this space as a technical notebook and reflection log: to write about firmware, software design, testing strategies, systems thinking, and lessons learned from building software that runs close to hardware. Occasionally, I also share personal interests and side projects, including leisure work I pursue in my free time.

Getting Started with MetricMQ on ESP32

MetricMQ is a 328 KB C++20 message broker built from scratch and still under development. It features a custom binary wire protocol, Ed25519 message signing enforced at the wire level, exactly-once delivery using sequence IDs with LMDB persistence, Prometheus metrics on every message path, and a native ESP32 Arduino client. This page shows the broker running four demos, each highlighting a different capability with live Prometheus metrics you can watch in real time.

Why Most Embedded Software Is Overcoupled - And How Dependency Injection Fixes It ??

Most embedded bugs aren’t hardware problems. They’re design problems , born from code that grew organically across board revisions, tightly knotted around pin numbers, register addresses, and brittle HAL calls scattered everywhere and with scalability things can get messy, adding to the technical debt. Its important we talk about how not to make your embedded software tightly coupled and leave room for extension & scalibility

Getting Started with MetricMQ with no hardware

Saptarshi Nag

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