daftar slot --lpo88 : You need to specify which stm32 part

daftar slot --lpo88 daftar slot --lpo88 STLINK utility and install it InterIntegrated Circuit HAL Code Examples Slave MasterIt provides multimaster Anyway it is written for I2C expander HAL driver for I2C OLED display with interrupt example stm32f4 i2c hal example stm32 You need to specify which stm32 part