Marlin-BTT-RRF-E3

You can find Marlin firmware for Ender 3 V2 on this repo, anything that you need that i can help just contact me and i´ll try my best to help.

BIG TREE TECH RRF E3 IT´S NOT COMPATIBLE WITH ENDER 3 V2 OUT OF THE BOX

So the board it´s perfectly compatible with Ender 3 and Ender 3 Pro but not with Ender 3 v2 version because of the screen.

/**
 *        Ender 3 V2 display                         BTT E3 RRF
 *                _____                                     _____
 *            5V | 1 2 | GND                            5V | 1 2 | GND
 *   (BTN_E1) A  | 3 4 | B (BTN_E2)         (BTN_EN1) PE11 | 3 4 | PB1 (BTN_E2)
 *          BEEP | 5 6   ENT (BTN_ENC)       (BEEPER) PE10 | 5 6   PB2 (BTN_ENC) (needs testing, is boot1)
 *      (RX1) TX | 7 8 | RX (TX1)                    RESET | 7 8 | PE7
 *            NC | 9 10| NC                            PE9 | 9 10| PE8 
 *                -----                                     -----
 *                EXP1                                      EXP1
 */

So all the configuration files on the pins for the motherboard can be done except for the TX and RX ones that will go on the TFT pin which is next to the probe connector:

(Image Pendig)

So you have to conect those wires to the pins marked as RX1 and TX1 just carefull with the names because

TX1 goes with RX

RX1 goes with TX.

BLTOUCH CONFIG

__

I added my probe offset congif, which are for the Hero Me 5 on the ender 3 V2 with a direct drive adapter, change them as you need.

So i'll try to get everything i can test here which the list right now is:

• E3 V2 DWIN (factory display)
• E3 V2 DWIN BLTOUCH (factory display)
• E3 V2 BTT TFT35 E3 V3.0
• E3 V2 BTT TFT35 E3 V3.0 BLTOUCH
• E3
• E3 BLTOUCH
• E3 TFT35 E3 V3.0
• E3 TFT35 E3 V3.0 BLTOUCH
• E3 PRO
• E3 PRO BLTOUCH
• E3 PRO TFT35 E3 V3.0
• E3 PRO TFT35 E3 V3.0 BLTOUCH