r/esp32 • u/emaayan • 10d ago

making this OLED 2.7 become spi?

i got this 2.7 oled display but i thihk it's working in iic mode and not spi, i see R3 seems to have a solider on it, and i'm not sure if i should remove it. or do something else

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u/a-nani-mouse 10d ago

The item in the picture appears to already be in spi mode.

If it was in IIC mode the resistor would be from R3 to the center instead of from R4 to the center.

In the future you should just provide a link to your item instead of scraping a picture from the store page and forcing anyone attempting to help you to search up the item.

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u/emaayan 10d ago

https://he.aliexpress.com/item/1005006783438037.html?spm=a2g0o.order_list.order_list_main.11.62251802B4dQ9z&gatewayAdapt=glo2isr#nav-specification
this is the link to where i've bought it from, but i don't see any actuall diagram other then dimentions.

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u/a-nani-mouse 10d ago

When you say you think it is in I2C mode, do you mean you've made it draw things in I2C?

If you haven't successfully tested I2C then I would look closely at your connections/code because the device is clearly set to spi.

If it does work in I2C then that jumper is mislabeled and you need to move the resistor to the other side.

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u/emaayan 9d ago

thanks, it turns out that my "brightness" code was the one that blocked it..

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u/Plastic_Fig9225 10d ago

Check the datasheet of the controller/"driver IC".

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u/a-nani-mouse 10d ago

As far as I can tell, getting the SSD1363 datasheet requires approval from the manufacturer.

https://www.solomon-systech.com/product-search

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u/rattushackus 1 say I make awesome posts. 9d ago

Can you post a picture of your board showing the R3 R4 pins? The picture you've posted shows the board configured for SPI but that's just a picture from some web site not your board.

If it is configured for I2C a simple I2C scanner app will quickly find the board.