ESP32-CAM-Print-Monitor

Camera print monitor for Marlin-based 3D Printers

Pictures

Video

Getting Started

You will need:

1. ESP32-CAM device
2. USB to Serial bridge adapter
3. 2 x 3.3V Zener Diodes 1N4728
4. Suitable housing for camera
5. Marlin-based 3D Printer
6. Serial connection from 3D Printer
7. 5V Power source or 5V connection from Printer

Connection diagram

Example without mains relay function:

Example including mains relay function(common ground connection between printer and ESP32 not drawn):

Practical Example:

TODO

• Implement Authentication
• Implement expandable menu to:
  • Configurable data refresh rate
  • Ability to reboot device
• Test Mains Relay code
• Implement OTA updates
• GCode helper
• Load index.html from SPIFFS - WIP
• Dream goal..... copy files to SD-Card over WiFi... FAST.....

In the code I'm using the following:
Serial connection to printer GPIO 14 & 15 - diodes between both these and GND to level shift to 3.3V - observe polarity
Pay attention to set the serial connection speed to the appropriate one for your printer.
GPIO 13 for relay that switches mains on/off

Acknowledgments

• @luc-github
• @Electronlibre2012