?Describe? The STM32F411CE development board is based on a high-performance Arm Cortex-M4 32-bit RISC core running at up to 100 MHz. The Cortex-M4 core has a floating-point unit (FPU) single-precision and supports all Arm processor's single-precision data processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) for enhanced application security. The STM32F411CE development board belongs to the STM32 product line (products combine power efficiency, performance, and integration) while adding a new innovative feature called batch acquisition mode (BAM), which can save more power during data batching. The STM32F411CE development board contains high-speed embedded memory (up to 512 KB Flash, 128 KB SRAM), and connections to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix. All devices offer a 12-bit ADC, a low-power RTC, six general-purpose 16-bit timers, including a PWM timer for motor control, and two general-purpose 32-bit timers. They also have standard and advanced communication interfaces. Up to three I2C, five SPI, and five I2S, two of which are full duplex. For audio class accuracy, the I2S peripherals can be clocked for synchronization through a dedicated internal audio PLL or an external clock. Three USART, SDIO interface, USB 2.0 OTG full speed interface, The STM32F411CE core board operates in the -40 to +125°C temperature range from a 1.7 (PDR OFF) to 3.6V power supply. A comprehensive set of power-saving modes allows the design of low-power applications. ?The three major features of the ARM processor are low power consumption and strong functions, 16-bit/32-bit dual instruction set, and suitable for STM32F411CE core board/development board. 1. Small size, low power consumption, low cost, high performance; 2. Support Thumb (16-bit)/ARM (32-bit) dual instruction set, which can be well compatible with 8-bit/16-bit devices; 3. A