Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
[!NOTE]
These bugs have all been fixed or do not exist in the bugfix-2.1.x branch.
26786
26801
26802
26809
26811
26859
26940
[!TIP]
Remain on your current version until the next Marlin release or migrate your Configurations to bugfix-2.1.x if any of the issues listed above could affect your machine.
List of Marlin
2.1.2.2
Known Issues26786
26801
26802
26809
26811
26859
26940
Version of Marlin Firmware
2.1.2.2