A compact, always-on weather monitor built with MicroPython and the Raspberry Pi Pico 2W.
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Continuously monitors environmental conditions:
- Outdoor temperature
- Indoor temperature, humidity, and atmospheric pressure
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Fetches daily weather forecasts
- Source: Deutscher Wetterdienst (DWD)
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Displays real-time data on an OLED screen:
- Automatically cycles through:
- Indoor conditions
- Tomorrow’s forecast
- Current time (from RTC)
- Agave font used for displaying info on screen.
- Automatically cycles through:
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Indicates weather changes visually:
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An RGB LED reflects the severity of detected weather changes:
- 🟢 Green – Normal
- 🔵 Blue – Mild change
- 🔴 Flashing Red – Severe weather alert
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Color and blinking speed indicate severity level.
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Sends notifications via ntfy.sh:
- Sends real-time weather alerts
- Posts a daily summary at a fixed time
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Runs autonomously and reliably:
- Refreshes readings and forecast data every few minutes
- Uses a watchdog timer to recover from failures
- Synchronizes the Real-Time Clock with NTP time servers
| Component | Purpose |
|---|---|
| Raspberry Pi Pico 2W | Main microcontroller with Wi-Fi |
| DS3231 RTC Module | Keeps accurate time across reboots |
| DS18B20 (1-Wire) | Measures outdoor temperature |
| BME280 (I2C) | Measures indoor temperature, humidity, pressure |
| SH1106 OLED Display | Displays data and weather forecast |
| HW-479 RGB LED Module | Indicates alert severity (via color and blinking) |
| Wi-Fi | For online forecasts and time sync |
Wi-Fi credentials are read from a local
credentials.txtfile containing 2 lines: your SSID and password.
| Component | Pico Pin(s) | Notes |
|---|---|---|
| DS18B20 (1-Wire) | GPIO15 | Requires 4.7kΩ pull-up resistor on data line |
| BME280 (I2C) | GPIO5 (SCL), GPIO4 (SDA) | Indoor sensor (dedicated I2C bus) |
| OLED SH1106 | GPIO16 (SCL), GPIO17 (SDA) | Dedicated I2C bus for display |
| RTC (DS3231) | GPIO19 (SCL), GPIO18 (SDA) | Dedicated I2C bus for Real-Time Clock module |
| RGB LED (HW-479) | GPIO0 (Red), GPIO1 (Green), GPIO2 (Blue) | PWM pins; LED color/blinking reflects weather severity |
| Power Supply | 3.3V / GND | Ensure all components share a common ground |
Licensed under the Apache License 2.0.