# Building FOFOCA: An Open-Source AI Robot with ESP32, ESP32-C3, and Edge AI

DevFeed: [Building FOFOCA: An Open-Source AI Robot with ESP32, ESP32-C3, and Edge AI](<https://devfeed.tech/articles/building-fofoca-an-open-source-ai-robot-with-esp32-esp32-c3-and-edge-ai-13771.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2026/05/fofoca-esp32-ai-robot/>)

Author: John Lee

Published: 2026-05-15T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [ESP32](<https://devfeed.tech/topics/esp32.md>), [Embedded Software Dev](<https://devfeed.tech/topics/embedded-software-dev.md>), [ESP32-C3](<https://devfeed.tech/topics/esp32-c3.md>), [Espressif](<https://devfeed.tech/topics/espressif.md>), [Raspberry Pi](<https://devfeed.tech/topics/raspberry-pi.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [MQTT](<https://devfeed.tech/topics/mqtt.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Nemotron](<https://devfeed.tech/topics/nemotron.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [api](<https://devfeed.tech/tags/api.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [ble](<https://devfeed.tech/tags/ble.md>), [blog](<https://devfeed.tech/tags/blog.md>), [bluetooth](<https://devfeed.tech/tags/bluetooth.md>), [building](<https://devfeed.tech/tags/building.md>), [computer-vision](<https://devfeed.tech/tags/computer-vision.md>), [edge](<https://devfeed.tech/tags/edge.md>), [edge-ai](<https://devfeed.tech/tags/edge-ai.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-c3](<https://devfeed.tech/tags/esp32-c3.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [firmware](<https://devfeed.tech/tags/firmware.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [microcontrollers](<https://devfeed.tech/tags/microcontrollers.md>), [mqtt](<https://devfeed.tech/tags/mqtt.md>), [nemotron](<https://devfeed.tech/tags/nemotron.md>), [nvidia](<https://devfeed.tech/tags/nvidia.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [pwm](<https://devfeed.tech/tags/pwm.md>), [raspberry-pi](<https://devfeed.tech/tags/raspberry-pi.md>), [real-time](<https://devfeed.tech/tags/real-time.md>), [risc-v](<https://devfeed.tech/tags/risc-v.md>), [robotics](<https://devfeed.tech/tags/robotics.md>)

## AI overview

This article presents FOFOCA, an open-source household robot reference design using an ESP32 for real-time motor and sensor control, an ESP32-C3 for an MQTT-connected OLED display, and a Raspberry Pi 5 as the processing brain. A local Dell R210 server runs NVIDIA Nemotron Nano 8B and supporting services, while ThinkNEO provides AI governance and audit routing.

## Source excerpt

FOFOCA is an open-source reference design for an AI-governed household robot, built around a Raspberry Pi 5 brain, an ESP32 for real-time motor control and sensor polling, and an ESP32-C3 driving an OLED status display over MQTT. This article walks through the hardware architecture, the firmware running on each Espressif chip, and how all of it connects to a local edge AI server running NVIDIA Nemotron Nano 8B for inference -- no cloud dependency required.