Embedded Systems

Bare-metal programming, ESP32, STM32, ARM Cortex-M, ESP-IDF, and production firmware patterns.

4 articles

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Embedded Systems

ESP32 Dual-Core Task Pinning with FreeRTOS: A Production Guide

Most ESP32 tutorials ignore dual-core pinning entirely. Here's how production firmware uses both cores — with real task allocation patterns from the field.

Rajath Kumar·Jun 26, 2026

Embedded Systems

MQTT vs HTTP for IoT: Which Protocol Should Your Firmware Use?

Most IoT tutorials default to HTTP without explaining why. Here's a head-to-head comparison of MQTT and HTTP from a firmware engineer who deployed both.

Rajath Kumar·Jun 25, 2026

Embedded Systems

ESP32 Memory Architecture: IRAM, DRAM, Stack, and Heap Explained

Stack overflows are the #1 silent killer of ESP32 production firmware. Understanding IRAM, DRAM, stack and heap allocation is the foundation of stable firmware.

Rajath Kumar·Jun 23, 2026

Embedded Systems

ESP32 and FreeRTOS: Why Your Arduino Loop Is Holding You Back

The Arduino loop() runs one thing at a time. FreeRTOS runs many — simultaneously, reliably, with priorities. Here's why every serious ESP32 project needs it.

Rajath Kumar·Jun 20, 2026