Descriptions:
Fahd Mirza covers MimiClaw, the most unconventional member of the OpenClaw AI assistant family: a complete AI agent — LLM calls, tool use, persistent memory, cron jobs, and Telegram communication — running on an ESP32S3 microcontroller that costs $5 to $10. Written entirely in C using Espressif’s ESP-IDF 5.4+ framework, MimiClaw requires no operating system, no Linux, and no runtime environment of any kind.
The ESP32S3 chip features two cores running at 240 MHz: Core 0 handles Wi-Fi polling and Telegram I/O while Core 1 is dedicated to AI processing. The hardware includes 8 MB of PSRAM (used for LLM stream buffers and conversation context) and 16 MB of flash storage partitioned into NVS (24 KB for Wi-Fi credentials and API keys), dual 3 MB app partitions supporting OTA firmware updates over Wi-Fi, and a SPIFFS filesystem for persistent agent files including skill definitions, memory, and conversation history. MimiClaw supports both Anthropic Claude and OpenAI GPT as AI providers, switchable at runtime via a serial CLI — no local models are supported due to hardware constraints.
Mirza provides a thorough walkthrough of the architecture diagrams, memory layout, and flash partitioning, plus a critical hardware note: the ESP32S3 has two USB-C ports that are not interchangeable, and flashing through the wrong port produces cryptic errors. Full setup instructions for Ubuntu using ESP-IDF 5.5 are linked in the pinned comment.
📺 Source: Fahd Mirza · Published February 22, 2026
🏷️ Format: Tutorial Demo
