Sunlight readable graphical display for ESP32 recommendations?

Other Hardware Displays
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Hi @david_prentice,

I have received the 3.2 inch 256*128 ST75256 module, configured for SPI: https://www.aliexpress.com/item/32825558941.html

photo of the rear side;

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I haven't tested it yet, as I've been struggling to find any wiring examples online, using SPI, but I think I've figured it out.

In some other listings of the 256*160 ST75256 driver (e.g. https://www.aliexpress.com/item/32341031044.html), they provide 3 different wiring configurations, for 平行 (Parallel), 串行 (Serial) and I2C. I assume that I will use the "Serial" configuration, as I'm using SPI.

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A0(RS) is the data command pin (DC).
SDA seems to connect to MOSI, in the context of SPI, per your post here Is this a SPI interface? - #2 by david_prentice.

All 3 SDA pins are connected together.

Here is a wiring diagram that I've come up with, using an ESP-32 with its default hardware VSPI bus pins (MOSI = 23, CS = 5, CLK = 18), along with 2 output pins for DC (17) and RESET (16);

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Using the u8g2 library and full buffer, the constructor would be;

U8G2_ST75256_JLX256128_F_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 5, /* dc=*/ 17, /* reset=*/ 16);

Does this seem correct?

thanks!

EDIT: got vdd (3.3v) and vss (GND) the wrong way around in diagram. now fixed.

Update: I can confirm that the wiring for SPI works. I have also run a test to determine whether it is sunlight-readable, by shining a small floodlight at it. I am also comparing it to a Nokia 5110 display, which is a well-known transflective display. Both of them appear very readable when exposed to the intense light. Hope this helps.