seryafarma / weather

Displaying weather information

Weather ⛅

Let's display the current weather and how is the forecast for the next few days?

Yeah it is mostly cloudy around here.

Hardware

The hardware utilizes a simple Wemos D1 board and 4x8x8 dot matrix module. It is simply using one SPI connection from the Wemos D1 to the module. The board needs to be connected to the internet to fetch the data.

Software

• A simple states approach with Arduino state machine library from https://github.com/jrullan/StateMachine.
• Weather information from https://openweathermap.org/
• NTC time from ezTime https://github.com/ropg/ezTime

It serves as a clock display, where every 5 minutes it will ask for the weather data and display it.

There is a pseudo state called Initialize where we initialize the things we want to print.

Note

We are using OpenWeatherMap API

https://openweathermap.org/price

Free 60 calls/minute 1,000,000 calls/month

If we call 1 call a minute = 1440 calls a day = 43200 calls a month. However since the weather doesn't change that much, this can be lowered to a call every 5 minutes.

This project calls once every 5 minutes for the current weather.

weather's Issues

Clean character parsing

Function get_http_weather can be a bit cleaned with the char parsing being put in another function.

Split Classes

Split the classes to individual header / libraries.

Add current time

Something like using the approach from:
https://github.com/seryafarma/WifiDeskClock

in this project to add time.

[Time default]
 ==>
after 1 minute
[Current Weather]
 ==>
[Forecast Weather]
return to [Time default]

Add forecast

Add the forecast for the next 3 days.

Read more in:
https://openweathermap.org/forecast16

Forecast should not change so reading it 1x per hour should be enough.

Change the pending_gather to an enum.
GATHER_FORECAST

GATHER_CURRENT

add a new event also gather_forecast along with a new gather state for forecast.

Change State Names

Change the state names to something more meaningful.