Vibe-code firmware — by opencircuit.org

Vibe-code your firmware.

Describe your idea — AI writes the code and the wiring for your real board, then flashes it over USB. No toolchain, no setup.

WHAT YOU GET BACK

Code and wiring, ready to flash.

Every generation hands back a compiling sketch and a pin-perfect wiring map — constrained to the exact board you picked.

main.ino ESP32 DevKit V1 · pins verified

// reads a BME280, prints °C to an OLED
#include <Adafruit_BME280.h>
#include <Adafruit_SSD1306.h>
Adafruit_BME280 bme;
Adafruit_SSD1306 oled(128, 64, &Wire);
void setup() {
  Wire.begin(21, 22);   // SDA, SCL
  bme.begin(0x76);
  oled.begin(SSD1306_SWITCHCAPVCC, 0x3C);
}
void loop() {
  float t = bme.readTemperature();
  oled.clearDisplay();
  oled.printf("%.1f C", t);
  oled.display();
}

WIRING

BME280 VCC3V3

BME280 GNDGND

BME280 SDAGPIO21

BME280 SCLGPIO22

OLED SDAGPIO21

OLED SCLGPIO22

Checked against the board GPIO map

Built in the open by the maker community MIT-licensed · open source

12,400+

Firmware projects generated

8,600+

Boards flashed over USB

3,200+

Makers in the community

1.9k

Stars on GitHub

Describe

Pick a board, say what it does

Generate

AI writes code + schematic

Preview

Simulate before you flash

Flash

Straight to your board over USB

SUPPORTED HARDWARE

Start with a board you own

8 boards at launch — every one community-tested on real silicon.

All boards

Verified

ESP32 DevKit V1

Espressif · ESP32

The wifi+BLE workhorse. Golden path — flashes straight from the browser.

240MHz

CLOCK

520KB

RAM

4MB

FLASH

Web flash ~30s

Verified

Raspberry Pi Pico

Raspberry Pi · RP2040

$4 dual-core M0+ with PIO. Drag-and-drop flashing over BOOTSEL.

133MHz

CLOCK

264KB

RAM

2MB

FLASH

Web flash ~30s

Verified

STM32 Nucleo-C031C6

STMicro · STM32C0

ARM Cortex-M0+ with an on-board ST-LINK — nothing extra to wire.

48MHz

CLOCK

12KB

RAM

32KB

FLASH

ST-LINK ~30s

Verified

Arduino UNO Q

Arduino · STM32U5 + Qualcomm

Dual-brain: a Linux MPU beside an STM32 MCU in the UNO footprint.

2.0GHz

CLOCK

2GB

RAM

16GB

FLASH

Web flash ~30s

Constrained to real pins

The AI only sees your board's actual GPIO map, peripherals and limits — no hallucinated pins.

Open board registry

Anyone with a kit can add & verify a board file. Coverage grows with the community.

Browser flashing

ESP & Pico flash straight from Chrome over USB. Everything else falls back to a download.

FROM THE COMMUNITY

Idea to flashed board, faster.

“It set up the I2C bus on the right pins the first time. I had a working sensor node before my coffee went cold.”

Maya Okafor

Robotics tinkerer

“No PlatformIO yak-shaving, no PATH wrangling. I describe the behaviour, preview it, and it lands on the board over USB.”

Devon Reyes

Firmware engineer

“My students go from idea to a blinking board in one class. The wiring map is what finally made it click for them.”

Priya Nair

STEM educator

PRICING

Start free. Pay for what you build.

Credits cover AI generations. Flashing, preview and export are always free.

Free

$0 forever

Core HexFlow features
2 verified boards
Browser (USB) flashing
Community board registry

Popular

Starter

$25

100 credits / mo

All 8 verified boards
Private projects
Wiring schematic export
Plan-first mode
Email support

Pro

$50

500 credits / mo

Unlimited + custom board files
Priority generation queue
OTA update pipelines
Team workspace · 3 seats
Premium support

Enterprise

Custom volume pricing

Custom board bring-up
On-prem / air-gapped flashing
SSO / SAML
Dedicated support + SLA
Volume credit pricing

FAQ

Questions, answered.

Eight community-verified boards at launch — the ESP32 family (DevKit V1, S3, C3), the ESP8266 D1 Mini and more — with new boards added to the open registry every week. Anyone with a kit can submit and verify one.

Bring an idea. Leave with firmware.

Describe it, flash it, ship it — all from your browser.