The SSD1306 was three picker entries — a generic `ssd1306` with a protocol
selector plus `ssd1306-i2c` / `ssd1306-spi` shortcuts (issue #101) — all the
same 8-pin wokwi-ssd1306 element. That is confusing for one physical module
(issue #215). Wokwi ships a single I2C-only part; this goes one better: a
single part that auto-detects the protocol from the wiring, like a real
breadboard — CS or DC wired to a GPIO means SPI, otherwise I2C. No protocol
switch to set, just wire it up.
Works on every board with an I2C/SPI bus (AVR, RP2040, ESP32 Xtensa, STM32).
The ssd1306-i2c / ssd1306-spi ids stay as backward-compat simulation aliases
for projects saved before the merge, but are removed from the picker. Adds an
i2cAddress property (0x3c/0x3d) matching the real module and Wokwi.
Note: ESP32-C3, Raspberry Pi 3 and the bare RISC-V board do not emulate I2C/SPI
peripherals, so no I2C/SPI device (this or any other) attaches there yet.
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