Here is a list of all documented files with brief descriptions:

[detail level 1234]

Core
Inc
sensors_inc
aht20.h	Driver interface for the AHT20 humidity and temperature sensor
bh1750.h	Driver interface for the BH1750 ambient light sensor
bmp180.h	Driver interface for the BMP180 barometric pressure and temperature sensor
filter.h	Sliding-window median filter for floating-point sensor values
i2c_core.h	Sensor-agnostic I2C read abstraction layer
main.h	: Header for main.c file. This file contains the common defines of the application
ring_buffer.h	Circular (ring) buffer for float sensor samples
stm32f4xx_hal_conf.h
stm32f4xx_it.h	This file contains the headers of the interrupt handlers
Src
filter.c	Sliding-window median filter implementation
i2c_core.c	Sensor-agnostic I2C read abstraction implementation
main.c	Main program body for the STM32F4 multi-sensor data acquisition system
ring_buffer.c	Circular (ring) buffer implementation for float sensor samples
stm32f4xx_hal_msp.c	This file provides code for the MSP Initialization and de-Initialization codes
stm32f4xx_it.c	Interrupt Service Routines
syscalls.c	STM32CubeIDE Minimal System calls file
sysmem.c	STM32CubeIDE System Memory calls file
system_stm32f4xx.c	CMSIS Cortex-M4 Device Peripheral Access Layer System Source File