WeAct Display FS is an inexpensive 0.96-inch USB display dongle designed to add an information display or a tiny secondary display to your computer or SBC. We’ve seen this type of information display ...
E (xxxx) i2c.master: I2C transaction unexpected NACK detected I²C scanners detect no devices at 0x3C or 0x3D, even though the OLED should use one of these. The OLED module has a 472 resistor (≈4.7kΩ), ...
I can replicate the OP's issue: with two 0.96" OLEDs on an ESP32 Thing Plus C. Using the SPI Hello example, whichever OLED is begun first displays the splash screen successfully. The second is blank.
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