Marlin VS OctoPrint

There is _a lot_ wrong with Marlin. It is a complex codebase, full with ancient artefacts, litterred with preprocessor ifdefs every 2-3 lines of code, dynamic includes in the middle of CPP files, etc[1]. It's about as unreadable as C++ code gets--well, I guess it's not template metaprogramming.

Klipper by contrast is a breeze to read through[2].

I am very grateful for Marlin, for all of reprap, and everyone who has contributed to it. But saying there is nothing wrong with it is straight up misguided.

[1]: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/M...

[2]: https://github.com/Klipper3d/klipper/blob/master/src/lcd_hd4...

I think you are mistaken. I can't speak for implementations preceding the Ender 3 V2, so what you're saying may have been true at some point for other machines. However, here you can see Marlin developers confirm that there is an EEPROM on the stock E2V2 board using diagrams from Creality and photographic confirmation. Here is the datasheet for the EEPROM. Here is a thread discussing this Marlin release, and also the then-recent release of official Creality firmware which resolved the same issue. Since the stock firmware is based on Marlin, and at the time Marlin did not support this type of EEPROM, the EEPROM was not usable at launch. Any mainstream firmware (official or third-party) from the last three years will be using the onboard EEPROM unless the user intentionally specified otherwise.

pull latest Marlin from github: https://github.com/MarlinFirmware/Marlin

Also, checked the following discussion but seems like I need to update the firmware to be able to comment that like right? Temperature variance monitor tweaks by zeleps · Pull Request #23571 · MarlinFirmware/Marlin · GitHub

i spent some time and successfully rebased Kobra 2.8.2 OG firmware from an unknown Marlin ~2.0.8 frankenstein to a clean latest (as of now) release (not bugfix) 2.1.x -- v2.1.2.1 + 1 commit

As an example, check the macropocalypse in Marlin - but the actual trigger for me to start was Reprap firmware doing a floating point divide in interrupt context while targeting AVR8 core…

Any change of thermistor or to a PT100/PT1000 will require recompiling the firmware, because every type has different characteristics. Marlin uses an internal table to calculate the temperature for whatever reading it gets from the CPU's analogue-to-digital converter. It has many tables for different thermistors, but only one is ever incorporated at compile time. So you have to specify which type you're using. You can see the commonly-used types in the list in Marlin's Configuration.h file, in the section headed // @section temperature. The tables themselves are in Marlin/src/module/thermistor.

FWIW It IS open source but the GNU General Public License v3.0 rules apply. https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/LICENSE

The cheapest way is to use OctoPrint. Octoprint itself is free, and although it's often run on a Raspberry Pi, it can be installed on many things, such as an old laptop runing Linux or even Windows, or a small single-board computer. OctoPrint would connect to the printer using a USB cable, and you'd send the slicer output to Octoprint over your WiFi.

Octoprint

2023-11-08 14:10:57,263 - octoprint.util.connectivity.connectivity_checker - INF O - Resolving octoprint.org is working

- Two LibreELEC (https://libreelec.tv/) mediaplayers in house (yes, one is not enough in my big family).

- One for hosting low usage applications at home network (Unifi controller and some more).

- Octoprint (https://octoprint.org) connected to the 3d-printer.

- One on my desk for hardware hacking – mostly as just a PC with GPIO.

- Some Raspberry Pi Zeros as security cameras.

Really quite easy, especially if you have ever dealt with a raspberry pi before. Once installed & set up, you manage everything over a web interface. I even added a webcam to it in order to see what's going on. Check out https://octoprint.org/

For other devices it can be harder, there are guides for installing on Linux on the octoprint website (I use an old laptop running Linux Mint). If using an old Android phone look for Octo4A.

I’d just get Octoprint setup and a camera for it