Add camera support

[probonopd]

There are now ESP32-CAM modules with camera and SD card. Can be had for around USD 10 from China. Ideal for our purpose.

@me-no-dev has added Arduino support for it :
espressif/esp32-camera#7 (comment)

It seems to be working well:

Thank you so much, worked out of the box here as well. I tried it on an ESP32-CAM with a wide angle lense I got from a TTGO T-Journal order.

[chepo92]

Wow, buying it !

[probonopd]

Internal pin connections:

Source:
https://github.com/SeeedDocument/Outsourcing/raw/master/113990580%20ESP32-CAM/113990580%20ESP32-CAM%20Product%20Specification.pdf

[probonopd]

We need to find a way to not get the ESP32 boot messages onto the serial line since they will make it impossible to boot the printer firmware (I have tested it!).

We may not have free pins to use Serial1 on this board? GPIO16 seems to be the only pin that is on the board and not connected to cam or SD.

Pulling down GPIO15 to ground during boot should also silence the ESP32 boot messages. But GPIO15 is also attached to CMD of the SD card.

Reference:
espressif/arduino-esp32#642

[chepo92]

We need to find a way to not get the ESP32 boot messages onto the serial line since they will make it impossible to boot the printer firmware (I have tested it!).

I'll test it too

We may not have free pins to use Serial1 on this board? GPIO16 seems to be the only pin that is on the board and not connected to cam or SD.

I haven't tested but I think Uarts can be mapped to any pin: https://quadmeup.com/arduino-esp32-and-3-hardware-serial-ports/

[probonopd]

Yes, but you need free pins that are not connected to the camera nor the SD card. And it looks like we are short of those...

[probonopd]

In addition to making a video stream of the printer, and taking timelapse images, we might do QR code recognition to e.g., recognize settings for different filaments based on QR codes (also see the Uniform Filament Identification system, UFID).

https://github.com/donny681/ESP32_CAMERA_QR/

[GMagician]

I read somewhere that boot log messages may be disabled on esp32 and not on esp8266, but I forget where I read it

[fred2088]

buy one, will test it out ...

[muenan]

Yes, but you need free pins that are not connected to the camera nor the SD card. And it looks like we are short of those...

Maybe you can use the LED PIN (GPIO33) and with SoftSerial (RX, TX | GPIO16, GPIO33). At the LED PIN you can solder a wire to the + side for the TX. The user (v12345vtm : https://github.com/v12345vtm/timelapse-ESP32-CAM ) has developed a timelapse feature. If you could put the project and his together, it would be ideal.

[probonopd]

Let's try it out. Unfortunately I don't have this hardware.

[fred2088]

we bought it and would like to try it out ...

[probonopd]

Looking forward to hearing from you how it goes @fred2088

[probonopd]

Have you made any progress @fred2088?