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Prusa-Firmware-ESP32-Cam/README.esp32_wrover.md

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Instructions to use the PrusaConnectCam with the FreeNove ESP32-WROVER

The Freenove ESP32-WROVER is an alternative option to the ESP32 Cam. It is available at https://store.freenove.com/products/fnk0060 as well as places like Amazon and Ali Express.

The main difference between this board and the ESP32-Cam is what pins are used. The steps below is everything you need to do, starting from scratch, to connect to set up and program the board.

Caveats

As of this writing, I have not tested putting an LED flash on the board, since I have a separate lighting rig. If someone confirms that it works, this README can be updated.

Install tools and set up the programming environment

The FreeNove documentation for the board is excellent. You can find it here, especially the PDF C Tutorial.

Make sure you do the following things from the FreeNove C tutorial. Note that some of these things overlap with the main README instructions, but this is a full set of steps that works for a new board and a new environment.

  1. Page 5 - Install the CH340 Drivers if you don't already have them.
  2. Page 15 - Install the Arduino IDE.
  3. Page 18 - Set the Preferences > Additional Board Manager URLS and add https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json.
  4. Page 19 - Install the esp32 tools in the Arduino board manager
  5. Page 21 - Select the esp32 Wrover Module from the available boards
  6. Page 48 - Format the included SD card. This step is optional. Formatting and installing the card will allow logs to be written to the card.

Install the additional libraries as per the main readme: here <-- Note: For some reason, this link doesn't always take you directly to the right place in the main readme. If not, go to README.md, find the What we need for functionality section, and follow the link under Install the necessary libraries in the Arduino IDE here.

Get the code and configure it for the WRover board

Clone this repository. In the Arduino editor, open the file ESP32_PrusaConnectCam/ESP32_PrusaConnectCam.ino.

You need to edit two files:

  • ESP32_PrusaConnectCam/mcu_cfg.h
  • ESP32_PrusaConnectCam/Camera_cfg.h

In each file, uncomment the line:

// #define USE_ESP32_WROVER 1

to make it:

#define USE_ESP32_WROVER 1

This will change the pinouts from those that match the ESP32-Cam to those that match the Freenove WRover board. Here is a summary of the changes:

  • Change the GPIOs used to connect to the camera
  • Change the GPIO used for the status LED
  • Change the GPIO used for the optional LED flash to GPIO32

Program the board

Note that the programming configuration is NOT the same as the main README.

  1. Install the 1GB flash card included with the Freenove kit into the SD card slot. This is optional, but doing so allows the board to write logs to it.
  2. Use a USB-C cable to plug the USB port on the board into your computer.
  3. Under the Tools menu in the Arduino IDE, check the following settings:
    • Board: ESP32 WRover Module
    • Port: choose the COM port for the board
    • Erase All Flash before sketch upload : Set this to enable the first time you program the board. The set it to disable. If you don't, it will erase the saved settings each time you program the board.
    • Flash Frequency: 80 MHz
    • Flash Mode: QIO
    • Partition Scheme: Huge App (3MB No OTA/1MB SPIFFS)
    • Upload Speed: 115200
  4. Hit the green Arrow button at the top left of the IDE to start programming the board.
  5. While the board is programming, go to Tools > Serial Monitor and set the serial monitor for 115200.
  6. Once the board is programmed, open the serial monitor tab. You should see everything working. If you see a message about a periodic reset, then this probably means the pin configuration is wrong. In that case, double check that you make sure you have uncommented the #define USE_ESP32_WROVER 1 line in BOTH files mentioned above.

Connecting to the board

The first time you program it, the board makes its own access point. You can connect your computer to it, then visit http://192.168.0.1 to set the WIFI name and password.

Once it has WIFI credentials, the board will reset and you can find its IP address in your router's DHCP table. I recommend reserving an IP for it in the router configuration so you can always find it.

When you connect to the camera's IP from your local network, you can configure the camera parameters (image size, brightness, etc) and add the Prusa token for your Prusa Connect configuration.

  • Navigate to connect.prusa3D.com
  • Open up the printer details page for the printer
  • Open up Cameras page.
  • Click + ADD NEW CAMERA
  • You may have to refresh the page, but an "Unnamed Camera" option will appear.
  • Copy the Token for the unnamed camera and input it on the camera's configuration page.

If everything is working, you should see shots from your camera showing up in Prusa Connect. If not, look at the serial monitor output to see if there are errors reported.

Installing the board in the enclosure

There are several options to mount the board