STM32L432 Development Board

A low-power STM32 MCU development board, compatible with Stm32duino.
Features: 
Full IO lead-
out Onboard WS2812, PB3 pin
GPIO main functions are listed in silkscreen on the back
BOOT0 button, convenient for switching boot mode
I2C interface with 5.1k pull-up
Support USB 2.0 FS, SPI, I2C, CAN2.0 USART, SWPMI, SAI, IR interface and other interfaces
Ultra-low power consumption, operating mode 85μA/MHz, 8nA/28nA in shutdown/Stdby mode. 
Arduino compatible
Built-in single-cell lithium battery management. Default charging current 500mA, change R11 programmable charging current
Built-in lithium battery protection to prevent overcharging, over-discharging and short circuit. For more information, see PST4521 datasheet
Lead-out on-board power supply, 3V, 5V, VUSB. 3V and 5V can be generated by battery power, with a maximum load capacity of 250mA, It is not recommended to use more than 200mA continuously when the battery voltage is low.
ARDUINO usage:
Download and install the Arduino environment
Install stm32duino https://github.com/stm32duino
After successful installation, select Tools->Board->STM32->Nucleo 32->Nucleo L432KC
Select the download method and other options according to your actual application.
At this point, the ARDUINO development environment is configured.