OFFLINE CNC CONTROLLER / ESP32 APPLICATION
G Code Offline Controller ESP32
An offline controller capable of making any CNC machine intelligent, primarily using an ESP32 and an ILI9341 touch screen.
About this project
About this project
A standalone touch pendant for a Grbl CNC machine, so nobody has to carry a laptop to the mill. A 30-pin ESP32 dev kit and a 240x320 ILI9341 touch display with an SD reader give you G-code preview with an auto-scaled toolpath, a jog screen with homing and work zero, and a file browser over both microSD and a USB stick through a CH376S. It streams G-code to Grbl over UART and tracks the full modal state with its own parser; it does not drive steppers itself. If the power drops mid-job, reboot brings up a safe homing cycle, restores that modal state and resumes at the interrupted line, provided the USB or SD stick stayed plugged in. A web dashboard mirrors status, jog and the console. Built with PlatformIO on Arduino, and the TFT_eSPI library has to be edited by hand before it compiles.
From the README
From the README
- Display
- The 240x320 TFT-ILI9341 display with a microSD card reader is used.
- Feature
- resumes from the exact line where it left off
- Build
- This project is built with PlatformIO on top of the Arduino framework for ESP32.
- Dependency
- Support for USB drive communication.
- Limit
- does not control stepper motors directly
Hardware
Boards: ESP32
Supported hardware: ESP32. Confirm the exact board revision and pin map in the upstream repository.
What the source supports
Upstream evidence: Reviewed from public README media at commit e33c02294807 under Apache-2.0. Firmware was not executed.
Media credit & rights
Upstream project media · rights remain with its owner · Credit: AdrianKosey
Screenshots decoded from the upstream README at a pinned commit. Repository code and firmware were not executed; the license texts are included in the preview package.
View original source ↗ Copyright & removal · Reviewed
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Repository links do not imply author endorsement or verified hardware compatibility. Check the upstream safety guidance before powering or flashing a build.