Interfacing OLED with ESP32 WROOM32

pacman22 · May 25, 2023

I want to connect two OLED display modules to ESP32. I want these OLEDs to display the same image at the same time. Will daisy chaining these two displays work? These displays will be communicating over 4-wire SPI.

Display: https://www.waveshare.com/1.5inch-rgb-oled-module.htm
ESP32WROOM32: https://www.espressif.com/sites/def...2-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf

KlausST · May 25, 2023

Hi,

Instead of daisy chaining them, I´d rather parallel connect them.

I just recognized the OLEDs don´t even have a data output ... then how is your idea to daisy chaining them at all?

For independent access they offer the CS signal .. on the same SPI bus.

Klaus

FvM · May 25, 2023

Sounds feasible.

pacman22 · May 25, 2023

KlausST said:
Hi,

Instead of daisy chaining them, I´d rather parallel connect them.

I just recognized the OLEDs don´t even have a data output ... then how is your idea to daisy chaining them at all?

For independent access they offer the CS signal .. on the same SPI bus.

Klaus

Share all SPI signals among both the displays including chip select. Is this what you mean?

KlausST · May 25, 2023

pacman22 said:
Is this what you mean?

Exactly.

Since there is no signal back from display to microcontroller, I see no reason for problems.

Klaus

pacman22 · May 25, 2023

KlausST said:
Exactly.

Since there is no signal back from display to microcontroller, I see no reason for problems.

Klaus

Thanks!

danadakk · May 25, 2023

Will both displays be observable in the same visual field ?

Asking because the controllers in the OLED display have asych processes,
and you could see artifacts possibly in both displays that would be observable from
same point of view.

Regards, Dana.

Interfacing OLED with ESP32 WROOM32

pacman22

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I want to connect two OLED display modules to ESP32. I want these OLEDs to display the same image at the same time. Will daisy chaining these two displays work? These displays will be communicating over 4-wire SPI.

KlausST

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FvM

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pacman22

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KlausST

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pacman22

pacman22

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danadakk

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Interfacing OLED with ESP32 WROOM32

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I want to connect two OLED display modules to ESP32. I want these OLEDs to display the same image at the same time. Will daisy chaining these two displays work? These displays will be communicating over 4-wire SPI.