Build a WiFi Weather Station with Schematik

A step-by-step tutorial for building a complete weather station using an ESP32, BME280 sensor, and Schematik for circuit design.

Kayvin K
Kayvin K
Build a WiFi Weather Station with Schematik

#What We're Building

A WiFi-connected weather station that measures temperature, humidity, and barometric pressure — then sends the data to a web dashboard. Total cost: under $15 in parts.

#Components

  • ESP32 dev board
  • BME280 sensor breakout (I2C)
  • 0.96" OLED display (SSD1306, I2C)
  • 3.3V voltage regulator (if powering from battery)
  • 4.7kΩ pull-up resistors (x2)

#Step 1: Design the Circuit in Schematik

Open Schematik and create a new project. Add an ESP32 module, BME280, and SSD1306 display from the component library. The wiring engine will automatically suggest I2C connections — both the sensor and display share the same SDA/SCL bus.

#Step 2: Review the Schematic

Check the auto-generated schematic. Verify that pull-up resistors are placed on the I2C lines. The BME280 address should be set to 0x76 (SDO pin to GND).

#Step 3: Wire It Up

Follow the generated wiring diagram on your breadboard. Connect VCC and GND first, then SDA and SCL with the shared pull-ups.

#Step 4: Upload the Code

Use the generated starter code from Schematik or write your own using the Adafruit BME280 and SSD1306 libraries. The code reads sensor data every 30 seconds and pushes it over WiFi.

#Step 5: Deploy

Once validated on the breadboard, export the PCB layout from Schematik and order from your preferred fab house. Add a 3D-printed enclosure and mount it outside.

#Result

A complete weather station that reports real-time environmental data to your phone. Total build time: about 2 hours.