The driver is ST7565
U8g2 library uses U8G2_ST7565_ERC12864_ALT_F_4W_SW_SPI
The board uses 5V voltage to supply power directly, and 3.3V voltage supply will cause the display to be unclear.
The 56Ω backlight adjustment resistor has been adjusted
The top icon is page 9 control
Thanks to Water Pump Specialty for providing pin definitions and schematic wiring guidance.
display effect:
The back of the board:
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