STM32 KiCad Weather Station

KiCad-based PCB project for an STM32-powered IoT weather station with environmental sensing, real-time clock support, battery charging, and e-paper display connectivity.

3D render:

Overview

This project is a custom two-layer PCB designed in KiCad for a compact embedded weather station.
The board is built around the STM32F103C8T6 microcontroller and integrates power management, sensing, display, and timekeeping components into a single design.

The main goal of the project was to practice the complete PCB design workflow: schematic capture, component selection, board layout, and preparation of production files.

Main features

• STM32F103C8T6 microcontroller
• BME280 environmental sensor
• DS3231S real-time clock
• E-paper display connector
• TP4056 Li-ion battery charging circuit
• AMS1117-3.3 voltage regulator
• USB-C power input
• 5 control buttons
• Status LEDs

Hardware components

Core components

• U1 — STM32F103C8T6
• U2 — BME280
• U3 — TP4056
• U4 — AMS1117-3.3
• U5 — DS3231S

Connectors and interfaces

• P1 — USB_C_Plug
• J1 — Battery
• J2 — Prog
• J3 — E-Paper_Display

User interface

• SW1–SW5 — buttons
• D1 — Blue LED
• D2 — Green LED
• D3 — Red LED

Design files

Schematic:

PCB layout:

Notes

This repository focuses mainly on the PCB design itself rather than firmware implementation.
The project includes the main design files, screenshots, and fabrication outputs for documentation purposes.

Tools used

• KiCad for schematic and PCB design
• Optional 3D viewer/export from KiCad for board rendering

Author

Vladyslav Kyshchun