Ender 3 v4.2.7 bltouch firmware July 8, 2019 16 32 64 128 Ender 3 v4 2.7 bltouch firmware Ender 3 pro v4 2.7 bltouch firmware Ender 3 bltouch marlin configuration Ender 3 bltouch setup Ender 3 s1 upgrade firmware How to install bltouch on ender 3 pro
