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Docs Hardware & Components OLED Panel Specs

OLED Panel Specs

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The 0.96 inch 128x64 OLED panel's specifications: controller, interface, voltage, and the variants that work with the beacon.

OLED Panel Specs

The 0.96 inch OLED is the beacon’s window. This page is its specification sheet in plain terms.

The panel

SpecValue
Size0.96 inches diagonal
Resolution128 x 64 pixels
ControllerSSD1306
InterfaceI2C (default 0x3C) or SPI (see OLED SPI vs I2C)
Supply3.3 V (the module includes a regulator)
Current15 - 30 mA typical

The display facts

  • Each pixel is its own light source: no backlight, so the “black” areas draw nothing.
  • The contrast is excellent and the viewing angle is wide, which matters in the field.
  • In direct sunlight OLEDs wash out; the beacon’s UI uses large glyphs partly for this reason.

The variants

VariantDifference
I2C 4-pinThe recommended type (GND, VCC, SCL, SDA)
I2C 6-pinAdds RES and DC pins: leave unconnected
SPIDifferent wiring, same panel (see OLED SPI vs I2C)
Yellow-blueTwo-tone panels: blue top, yellow bottom

The address check

The I2C address is 0x3C for nearly all SSD1306 panels. A few use 0x3D. If the display stays dark with correct wiring, try the other address before suspecting the panel (see OLED Library Notes).