# bdring/Grbl_Esp32

A port of Grbl CNC Firmware for ESP32

Repository: https://github.com/bdring/Grbl_Esp32
Canonical: https://ross.abutalabs.com/products/grbl_esp32
Language: nesC
License: GPL-3.0
License Family: copyleft
Topics: grbl, esp32, cnc, stepper-motor
Last push: 2024-02-25T18:35:23+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2963, "days_push": 920, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1964, forks 586 (observed 2026-08-28T04:05:59.778013+00:00)

## What it is
Grbl_ESP32 is a port of the Grbl CNC controller firmware to the ESP32 microcontroller, supporting up to 6 coordinated axes, 12 motors, WiFi/Bluetooth connectivity, and a built-in web-based CNC control app. It is now in maintenance mode, with all new development moved to its successor FluidNC.

## Use cases
- control a CNC machine with an ESP32 board
- run gcode files from an SD card over WiFi
- drive stepper motors with auto-squaring dual motor axes
- use sensorless homing with Trinamic stepper drivers
- control a laser with PWM power compensation
- send gcode over Bluetooth serial from a phone
- upgrade firmware over the air on a CNC controller

## When to choose
- you need Grbl-compatible CNC firmware on ESP32 hardware
- you want WiFi, Bluetooth, and web-based control built into the firmware
- you need more axes, motors, or step rate than 8-bit AVR Grbl supports
- you have existing Grbl_ESP32-compatible controller hardware

## When to avoid
- you are starting a new project - use FluidNC instead, which receives all new features
- you need firmware for 8-bit AVR Arduino boards - use original Grbl
- you need non-CNC motion control like 3D printing - use Marlin or similar

## Facets
- artifact type: application
- maturity: maintenance
- function: embedded, robotics, http-server
- domain: embedded-systems, hardware
- platform: iot, embedded
- tags: cnc, grbl, gcode, stepper-motor, firmware, esp32, fluidnc-successor, automation

## Member repositories
- bdring/Grbl_Esp32 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:59.778013+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:05:30.097044+00:00, confidence not recorded.
  - readme: https://github.com/bdring/Grbl_Esp32 (fetched 2026-08-28T04:05:59.778013+00:00, sha 18593941e59b)
- Data as of 2026-08-30T08:39:29.467469+00:00.