This tutorial shows you how to interface an I2C LCD1602 with an STM32F103 using the PCF8574 expander, STM32CubeMX, and CubeIDE with HAL. You'll configure I2C in CubeMX, understand the PCF8574 address and pin mapping, and write HAL code to display strings, integers, and. The project requirement is to use optical ethernet with STM32MP257F. I want to try this interfacing first at STM32MP257F EV1 with some copper to optical Ethernet converter module, but in STM32MP257F EV1, Ethernet pins are not available for interfacing. Kindly suggest some solution for using optical. Plug the SFP module into the host board connector and connect the laser to the optical plug-in of the scope. As there is only very little data to be transferred (actually no real need for gigabit), a Cortex-M microcontroller would probably do the job. It comes with a 10/100 MAC interface. On the other end, I have SFP moduls, either copper or fiber, 1000 Base-SX or 1000 Base-T. I've checked some datasheets of SFP modules and they all seem to have the same interface, although, many SFP modules. STM32 microcontrollers support multiple LCD interfaces: For most small monochrome modules, SPI is the optimal balance between simplicity and speed. Here's a common SPI connection for 128×64 LCD modules: Tip: Always check your LCD's datasheet. Whether you're building a smart thermostat, a fitness tracker, or an industrial control panel, understanding these display. In this tutorial, you'll learn how to interface STM32 with LCD 16×2 display and integrate the STM32 LCD library into your project. We'll start with an introduction to the LCD 16×2 display, how to implement an STM32 LCD 16×2 Library (driver), and test it on a real STM32 blue pill board.