Ender 3: How to install a bootloader and update firmware

The Ender 3 upgrades continue! In this guide, I show you step by step how to flash a bootloader to the Melzi board so you can upgrade your firmware. Why would you do that? The safety net of thermal runaway protection and the capacity for future mods.

There were some other guides out there but I felt they were either out of date of not concise. I hope this tutorial is easy to follow. Fortunately the bootloader flashing only needs to be done once.

One thing I forgot to include is the need to go to 'Initialize EEPROM' in LCD menu after flashing the firmware.

Creality have released their own firmware source, but I would recommend the TH3D Unified firmware instead, as it is based on a newer version of Marlin. You will lose power off recovery but it is only a matter of time before this is ported over now that Creality have released the source code.

A future video will cover the installation of a BLtouch, hit subscribe so you don’t miss it.

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Creality 3D official firmware (not recommended at this stage): https://github.com/Creality3DPrinting...

TH3D Unified Marlin firmware (as covered in this guide): https://www.th3dstudio.com/knowledge-...

Geekcreit® Arduino UNO R3: http://bit.ly/2JVc1Gc
Elegoo UNO R3: https://amzn.to/2SBbHke

Dupont / jumper wire DIY kit: https://www.banggood.com/620pcs-Wire-...

Dupont crimping tool: https://www.banggood.com/SN-01BM-Term...

Premade Dupont /jumper wires: https://www.banggood.com/120pcs-20cm-...

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