BIGTREETECH Mini12864 V2.0 LCD Graphic Smart Display Control Board with Adapter and Cable for Ender-3 VORON 2.4 Prusa-i3 3D Printer RAMPS 1.4 RepRap 3D Printer Mendel Prusa Arduino

After significant trial, error, and several wiring diagrams, I did manage to get this thing to work with my MKS Gen L 1.0 and Marlin 2.0. Apparently the connectors need to be flipped upside down so that the notch points in the other direction. I got a small flathead screwdriver and gently pried the plastic connector shells up, back, and forth until they slid all the way off of the pins. I then rotated them 180 degrees and pushed them back on, and the display worked right away. I saw that other reviewers were having the same "clicking" problems, so I thought that I might add my solution.The colors are nice and the controls seem to function well, no complaints there. Marlin evidently sets the contrast all of the way up when configured for this display, so I didn't have any issues with that. My only gripe was that there was no indication in the product description that the display might need to be modified to work with some mainboards. That being said, if you are building or modifying your own printer, some fiddling should be expected, so I'm not really upset about it.

Plugs in into EXP1 and EXP2 like you would think, works well, and you can set the color to any color and brightness you like (I just like green). Here is sample Klipper display and M300 buzzer code that works with my BTT Octopus 1.1 pins.[display]lcd_type: uc1701cs_pin: EXP1_3a0_pin: EXP1_4rst_pin: EXP1_5encoder_pins: ^EXP2_5, ^EXP2_3#reversed direction#encoder_pins: ^EXP2_3, ^EXP2_5click_pin: ^!EXP1_2contrast: 63spi_software_mosi_pin: PA7spi_software_miso_pin: PA6spi_software_sclk_pin: PA5[neopixel btt_mini12864]pin: EXP1_6chain_count: 3color_order: RGBinitial_RED: 0.0initial_GREEN: 0.45initial_BLUE: 0.0[output_pin BEEPER_Pin]pin: EXP1_1pwm: Truevalue: 0shutdown_value: 0cycle_time: 0.001scale: 1[gcode_macro M300]gcode:{% set S = params.S|default(1000)|int %} ; S sets the tone frequency{% set P = params.P|default(100)|int %} ; P sets the tone duration{% set L = 0.5 %} ; L varies the PWM on time, close to 0 or 1 the tone gets a bit quieter. 0.5 is a symmetric waveform{% if S <= 0 %} ; dont divide through zero{% set F = 1 %}{% set L = 0 %}{% elif S >= 10000 %} ;max frequency set to 10kHz{% set F = 0 %}{% else %}{% set F = 1/S %} ;convert frequency to seconds{% endif %}SET_PIN PIN=BEEPER_Pin VALUE={L} CYCLE_TIME={F} ;Play toneG4 P{P} ;tone durationSET_PIN PIN=BEEPER_Pin VALUE=0

Perfect little screenSome things if you're setting up in Marlin Firmware:enable NEOPIXEL_LEDset NEOPIXEL_TYPE to NEO_RGB

So far I've had nothing but good experiences with BTT. The screen is almost no exception, it works as intended, plugs in perfectly with my SKR 1.4T, and setting it up with Marlin isn't terribly difficult. The only issue I had with this order is there are a couple pretty deep scratches along the screen, as well as a dark spot along the top left from the damage. The packaging wasn't damaged, and it was wrapped safely in the foam pieces it comes with, so I know it was put in the box that way. I don't have the time to send it back and request a new one, and again it works as intended, but it was mildly upsetting to see. (Photo is after I set everything up and started printing the mount for the screen, the two "hairlines" are deep cracks you can see clearly and feel)

Warning ! The "neopixel", in other words WS2811 LED drivers on the board, have issues when driven from 3.3v on a SKR 3.0 board ( STM32H micro-controller ). They don't work reliably with the 3.3v logic levels from the controller. The only way to fix that is adding a level shift ( to 5V TTL logic ) on the EXP1 header pin 5 to the WS2811. Then it works just great, see the pics.Build quality is great and used on other platforms with 5v drive it would be perfect.It would get 5 stars if not for the lack of adding a 3.3v -> 5v level shift on the DIN ( EXP1 pin 5 )

If you are getting this and going to customize your marlin install with a skr 1.4 or similar,, this worked much better using the 12864 fystech option and following thier instructions (save for the flips of the exp guards). Didnt work with the btt guide but was up and running really quick with the fystech version. All in all happy woth the size and clarity.

Exactly as advertised, did what it was supposed to do, can't complain. And although I feel it would be better located on the other end of the board, I do like very much the fact that the SD card plugy-iny slot is of the full size SD card. Super great, like a corner-piece brownie. I'd have to say that everything here is just ducky. <--- See what I did there? I am so clever.'ting!

I bought this to run on a RAMPS 1.4, and could never get it to do anything but bake an annoying clicking noise. I configured Marlin in the Arduino IDE for the BTT_MINI_12864_V1 and adjusted contrast to 255 as suggested in other reviews, but it still didn't work. I swapped cables, and saw some led activity in the knob, but still couldn't get it to work.It probably runs fine on a BTT SKR board, but I couldn't get it to run on RAMPS1.4