Board datasheet is here, detailed pdf is here.

The board is based on STM32L475VG MCU.

Here is the list of missing features:

• initial support (basic features: uart, spi, etc): boards: add initial support for ST b-l475e-iot01a #7584
• I2C support for stm32l4, cpu/stm32: unify i2c drivers and apply new API #9202
• ADC support for stm32l4, cpu/stm32l4: add adc implementation #8804
• configure driver for HTS221 (temperature and humidity), boards/b-l475e-iot01a: configure second I2C and on-board sensors (lis3mdl, lsm6dsl and hts221) #9716
• configure driver for LIS3MDL (magnetometer), boards/b-l475e-iot01a: configure second I2C and on-board sensors (lis3mdl, lsm6dsl and hts221) #9716
• configure driver for LSM6DSL (accelerometer), boards/b-l475e-iot01a: configure second I2C and on-board sensors (lis3mdl, lsm6dsl and hts221) #9716
• driver for LPS22HB (pressure), drivers/lpsxxx: refactor lps331ap and add support for lps25hb + lps22hb #10695
• driver for VL53L0X (TOF and gesture detection)
• driver for MP34DT01 (microphone)
• driver for WiFi module Inventek ISM43362-M3G-L44
• driver for SPBTLE-RF (Bluetooth 4.1)
• driver for SPSGRF-868/915 (SubGH RF module)