WeMosWeather

3D Printed Solar powered Weather station

Station

• 3D Printed Case (PLA) (created with Autodesk 123Design)
• BME 280
• WeMos D1 Mini
• Light Sensor
• 3.7V Lithium Ion Battery 18650

Sketch

• Arduino .ino Sketch for WeMos D1 mini/ESP (sketch_solar_weather_thingspeak)
• Reads and Posts Sensor Data to Thingspeak in interval (every 5 min)
• Uses ESP.deepSleep to save most Power

Dependencies

• ESPAsyncWebServer
• ESPAsyncTCP
• ESP8266-FS-Uploader

Android App

• Fetches Data from Thingspeak Server
• Displays Data on UI Dashboard
• Shows History of all collected Data

TODOs

• Home Screen Widget
• Weather Prediction based on Pressure values

Dependencies

• HelloCharts
• Material Design

Thingspeak Api

• Create a free Account on Thingspeak
• Add a private Channel with Field 1 (Temperature), Field 2 (Pressure), Field 3 (Humidity)
• To allow the Android App and WeMos Sketch to post/read Data to/from Thingspeak add the following files:

/sketch/solar_weather_thingspeak/api.h:

const char* api_key = <YOUR_THINGSPEAK_CHANNEL_API_KEY>;
char ssid[] = <YOUR_WIFI>;
char pass[] = <WIFI_PASSWORD>;

/android/app/src/main/res/values/api.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <item name="THINGSPEAK_READ_KEY" type="string"><YOUR_THINGSPEAK_CHANNEL_READ_KEY></item>
    <item name="THINGSPEAK_CHANNEL" type="string"><YOUR_THINGSPEAK_CHANNEL_ID></item>
</resources>

Web Page

• Alternative sketch_solar_weather_webasync
• Basic static HTML Page to View Station Data directly from the WeMos
• Bootstrap Design
• URL: http://<WEMOS_IP_ADRESS>

Sources

• Thingspeak
• Instructables
• Esp8266 Bootstrap Example