Introduction

LaserProjector V2 is a battery-powered, ESP32-based laser XY scanner using stepper motors to deflect the beam. It has auto-homing functionality, and can be controlled wirelessly (Wi-Fi & Bluetooth).

Features

• Hybrid Wi-Fi operation mode (STA & AP)
• Webserver GUI with custom WebSocket protocol
• Concurrent multi-user control
• Automatic/Manual/External scanning mode
• Parallel auto-homing
• Battery-powered

Links

• Documentation [stanleyprojects.com]
• Article [hackaday.com]
• Video [youtube.com]
• Project [hackaday.io]
• Project [hackster.io]

Design

How to build your own release

Prerequisites

• Visual Studio Code with PlatformIO extension
• 3.3V USB to Serial (e.g. FT232RL)

Building

1. Open firmware/src folder in VSCode
2. In firmware/src/src/main.cpp you can sustomize SSID and PASSWORD for Wi-Fi STA mode:

const char* ssid = "<your_ssid>";
const char* password = "<your_pass>";

3. In firmware/src/platformio.ini set the correct upload_port, or remove to auto-detect.

4. Build and upload the filesystem

   • PlatformIO > esp32serial > Platform > Build Filesystem Image
   • PlatformIO > esp32serial > Platform > Upload Filesystem Image

5. Build and upload the firmware

   • PlatformIO > esp32serial > General > Upload

Pre-built binaries

After the firmware is loaded, any subsequent updates can be done OTA in browser by visiting http://<esp32-ip-address>/update

The pre-built binaries are located in firmware/bin

Version	Firmware	Filesystem
0.1	LaserProjectorV2_firmware_v0.1.bin	LaserProjectorV2_filesystem_v0.1.bin

Credits

• A Beginner's Guide to the ESP8266
• ElegantOTA
• StepperDriver