How / where to enable UI encoder

I am trying to configure Marlin for a Ramps 1.6 board on a MEGA 2560 . I have an I2C 4x20 character LCD enabled. I have the LCD working with #define LCD_SAINSMART_I2C_2004

I have a separate encoder, with push button, but I can't find where to enable it. It seems that combo display-encoder-buzzer boards are enabled as a set. Some common name, like the define I used for the display. But I can't find any useful information that includes a I2C LCD with an encoder.

I'm looking for a configuration that would enable my LCD and encoder, or just some way to enable the encoder by itself.

For some configurations I found the following. But When I connect my encoder to those pins nothing happens when I try it. So I think I need to enable them somewhere.

//encoder pins
#define BTN_EN1 31
#define BTN_EN2 33
#define BTN_ENC 35

You need #define NEWPANEL and the 3 pins above defined

Edited 1 time(s). Last edit at 09/19/2019 11:41PM by Dust.

I couldn't find an I2C LCD setup that included #define NEWPANEL

So I manually added

//encoder pins
#define BTN_EN1 31
#define BTN_EN2 33
#define BTN_ENC 35
#define NEWPANEL

It compiled but I get no change on the LCD when I turn the encoder or push the encoder (button). I'll try again tomorrow. (midnight now)

looks like you also need ULTIPANEL

It's working. The LCD works through I2C and the encoder is working through port pins.
I included the following, with and without NEWPANEL defined.

#define ULTIPANEL    
//#define NEWPANEL

//encoder pins 
#define BTN_EN1 37
#define BTN_EN2 35
#define BTN_ENC 31

I did have a problem where I had to turn the encoder four clicks to produce one step. I had to set the following to 1, although it seemed the default should have been 1.

#define ENCODER_PULSES_PER_STEP 1

There still is something wacky. When I select a selection, I get the item below it. Like if I want to move the X axis, I select that, but the selection then put me into the Y axis screen.

If I set the fan speed to 60, after clicking pushing enter to accept the 60, 59 is displayed as the current value.

EDIT:

I think it has something to do with the kind of encoder I am using. To reduce the problems I have to set
#define ENCODER_PULSES_PER_STEP 2
and that gets rid of the worst of the problems. I have to turn the encoder twice as much for some things, but I can end up when I need to go.

Edited 3 time(s). Last edit at 09/21/2019 08:05PM by rudyfiero.