Universal Display: How to set offset for BW SSD1306 72x40

[jeroenvermeulen]

Hello friends.
I have an ESP32-C3 0.42-Inch Oled White Light Display BT Development Board Type-C
My first success in getting the display correctly working was this answer.

In Tasmota with the Universal Display Driver when I use this display.ini:

: SSD1306 0.42" 72x40 with X offset (132-72)/2 = 30, Y offset (64-40)/2 = 12
:H,SSD1306,128,64,1,I2C,3c,*,*,*
:S,0,2,1,0,30,20
:I
AE
D5,80
A8,3F
D3,00
40
8D,14
20,00
A1
C8
DA,12
81,9F
D9,F1
DB,40
A4
A6
AF
:o,AE
:O,AF
:A,00,10,40,00,00
:i,A6,A7
#

This works but I have to use an offset all the time:

X offset (132-72)/2 = 30
Y offset (64-40)/2  = 12

The attached photo is the result of this command:

DisplayText [zx30y12r72:40x34y27] 72 x 40

So I start drawing the rectangle from position x:30, y:12.

My question: Is there a way to set this offset in display.ini for this monochrome display?
I have already tried the 'EastRising 0.42 OLED 72x40 used on 01space ESP32-C3-0.42 OLED' config.

[sfromis]

I've not got that smaller display, but am wondering about your display.ini. You've concluded that you need offsets of 30 and 12, as described in the first line. How come that your offsets in the :S line are instead 30,20, and you still having image dimensions 128,64 in the :H line?

: SSD1306 0.42" 72x40 with X offset (132-72)/2 = 30, Y offset (64-40)/2 = 12
:H,SSD1306,128,64,1,I2C,3c,*,*,*
:S,0,2,1,0,30,20

Of course, without knowing how skewed the result is with different details, IDK how much movement is needed.

Another detail is that your comment line at the top is starting with : (colon) while the docs suggest comment lines starting with ; (semicolon).

[jeroenvermeulen]

Yes I mention it in the first line, but did not find a fix yet.
The memory buffer of the SSD1306 seems to be 132x64.
I have tried:

:H,SSD1306,72,40,1,I2C,3c,*,*,*
:S,0,2,1,0,30,12

and

:H,SSD1306,128,6,1,I2C,3c,*,*,*
:S,0,2,1,0,30,12

But in both cases I needed to apply the offset to draw the rectangle in the correct place.

[jeroenvermeulen]

When I do DisplayRotate 2 I have to use offset X 26, offset Y still 12 to get the rectangle in the right spot.

DisplayText [zx26y12r72:40x30y27] 72 x 40

[jeroenvermeulen]

I also have an EastRising 0.42 OLED 72x40 compatible module, which I sure recommend.
For that one you can use Auto-Conf and it directly works without offset. So I can do:

DisplayText [zx0y0r72:40x5y14] 72 x 40

It uses this display.ini:

; EastRising 0.42 OLED 72x40
; used on 01space ESP32-C3-0.42 OLED
; Demo cmd: DisplayText [zx0y0r72:40x5y14] 72 x 40
:H,SSD1306_72X40,72,40,1,I2C,3c,*,*,*
:S,0,1,1,0,0,0
:I
AE
D5,80
A8,27
D3,00
AD,30
8D,14
40
20,00
A1
C8
DA,12
D9,22
DB,20
2E
A4
A6
AF
:o,AE
:O,AF
:D,81
:i,A6,A7
:A,00,10,40,00,1C
#

I hope somebody can help me to get first one from this discussion working without having to offset all my coordinates.