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ThomasFarstrikeThomasFarstrike
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Merge pull request #62 from pavelmachek/m_6_weather
weather: start simple weather application
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‎internal_filesystem/apps/cz.ucw.pavel.weather/META-INF/MANIFEST.JSON‎

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{
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"name": "Weather",
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"publisher": "Pavel Machek",
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"short_description": "Display weather information.",
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"long_description": "This displays weather information from open-meteo.com.",
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"icon_url": "https://apps.micropythonos.com/apps/cz.ucw.pavel.weather/icons/cz.ucw.pavel.weather_0.0.1_64x64.png",
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"download_url": "https://apps.micropythonos.com/apps/cz.ucw.pavel.weather/mpks/cz.ucw.pavel.weather_0.0.1.mpk",
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"fullname": "cz.ucw.pavel.weather",
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"version": "0.0.1",
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"category": "utilities",
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"activities": [
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{
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"entrypoint": "assets/main.py",
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"classname": "Main",
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"intent_filters": [
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{
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"action": "main",
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"category": "launcher"
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}
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]
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}
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]
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}
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‎internal_filesystem/apps/cz.ucw.pavel.weather/assets/main.py‎

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from mpos import Activity
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"""
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Look at https://open-meteo.com/en/docs , then design an application that would display current time and weather, and summary of forecast ("no change expected for 2 days" or maybe "rain in 5 hours"), with a way to access detailed forecast.
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"""
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import time
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import os
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try:
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import lvgl as lv
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except ImportError:
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pass
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from mpos import Activity, MposKeyboard
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import ujson
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import utime
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import usocket as socket
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import ujson
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# -----------------------------
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# WEATHER DATA MODEL
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# -----------------------------
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class WData:
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WMO_CODES = {
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0: "Clear sky",
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1: "Mainly clear",
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2: "Partly cloudy",
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3: "Overcast",
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45: "Fog",
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48: "Rime fog",
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51: "Light drizzle",
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53: "Drizzle",
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55: "Heavy drizzle",
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56: "Freezing drizzle",
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57: "Freezing drizzle",
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61: "Light rain",
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63: "Rain",
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65: "Heavy rain",
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66: "Freezing rain",
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67: "Freezing rain",
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71: "Light snow",
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73: "Snow",
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75: "Heavy snow",
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77: "Snow grains",
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80: "Rain showers",
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81: "Rain showers",
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82: "Heavy rain showers",
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85: "Snow showers",
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86: "Heavy snow showers",
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95: "Thunderstorm",
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96: "Thunderstorm + hail",
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99: "Thunderstorm + hail",
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}
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def code_to_text(self, code):
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return self.WMO_CODES.get(int(code), "Unknown")
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class Hourly(WData):
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def __init__(self, cw):
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self.temp = cw["temperature_2m"]
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self.wind = cw["windspeed"]
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self.code = self.code_to_text(cw["weather_code"])
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def summarize(self):
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return f"{self.code}\nTemp {self.temp}\nWind {self.wind}"
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class Weather:
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name = "Prague"
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lat = 50.08
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lon = 14.44
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def __init__(self):
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self.now = None
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self.hourly = []
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self.daily = []
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self.summary = "(no weather)"
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def fetch(self):
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self.summary = "...fetching..."
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# See https://open-meteo.com/en/docs?forecast_days=1&current=relative_humidity_2m
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host = "api.open-meteo.com"
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port = 80 # HTTP only
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path = (
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"/v1/forecast?"
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"latitude={}&longitude={}"
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"&current=temperature_2m,dewpoint_2m,pressure_msl,precipitation,weather_code,windspeed"
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"&timezone=auto"
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).format(self.lat, self.lon)
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print("Weather fetch: ", path)
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# Resolve DNS
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addr = socket.getaddrinfo(host, port, socket.AF_INET)[0][-1]
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print("DNS", addr)
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s = socket.socket()
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s.connect(addr)
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# Send HTTP request
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request = (
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"GET {} HTTP/1.1\r\n"
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"Host: {}\r\n"
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"Connection: close\r\n\r\n"
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).format(path, host)
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s.send(request.encode())
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# ---- Read response ----
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# Skip HTTP headers
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buffer = b""
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while True:
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chunk = s.recv(256)
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if not chunk:
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raise Exception("No response")
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buffer += chunk
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header_end = buffer.find(b"\r\n\r\n")
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if header_end != -1:
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body = buffer[header_end + 4:]
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break
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# Read remaining body
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while True:
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chunk = s.recv(512)
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if not chunk:
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break
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body += chunk
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s.close()
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# Strip non-json parts
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body = body[5:]
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body = body[:-7]
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print("Have result:", body.decode())
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# Parse JSON
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data = ujson.loads(body)
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# ---- Extract data ----
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cw = data["current"]
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self.now = Hourly(cw)
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self.summary = self.now.summarize()
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weather = Weather()
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# ------------------------------------------------------------
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# Main activity
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# ------------------------------------------------------------
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class Main(Activity):
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def __init__(self):
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self.last_hour = 0
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super().__init__()
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# --------------------
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def onCreate(self):
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self.screen = lv.obj()
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#self.screen.remove_flag(lv.obj.FLAG.SCROLLABLE)
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scr_main = self.screen
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# ---- MAIN SCREEN ----
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label_time = lv.label(scr_main)
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label_time.set_text("(time)")
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label_time.align(lv.ALIGN.TOP_LEFT, 10, 40)
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label_time.set_style_text_font(lv.font_montserrat_24, 0)
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self.label_time = label_time
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label_weather = lv.label(scr_main)
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label_weather.set_text(f"Weather for {weather.name} ({weather.lat}, {weather.lon})")
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label_weather.align_to(label_time, lv.ALIGN.OUT_BOTTOM_LEFT, 0, 10)
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label_weather.set_style_text_font(lv.font_montserrat_14, 0)
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self.label_weather = label_weather
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label_summary = lv.label(scr_main)
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label_summary.set_text("(weather)")
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#label_summary.set_long_mode(lv.label.LONG.WRAP)
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label_summary.set_width(300)
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label_summary.align_to(label_weather, lv.ALIGN.OUT_BOTTOM_LEFT, 0, 5)
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label_summary.set_style_text_font(lv.font_montserrat_24, 0)
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self.label_summary = label_summary
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btn_hourly = lv.button(scr_main)
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btn_hourly.set_size(100, 40)
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btn_hourly.align(lv.ALIGN.BOTTOM_LEFT, 10, -10)
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lv.label(btn_hourly).set_text("Reload")
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btn_hourly.add_event_cb(lambda x: self.do_load(), lv.EVENT.CLICKED, None)
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self.setContentView(self.screen)
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def onResume(self, screen):
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self.timer = lv.timer_create(self.tick, 15000, None)
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self.tick(0)
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def onPause(self, screen):
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if self.timer:
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self.timer.delete()
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self.timer = None
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# --------------------
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def tick(self, t):
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now = time.localtime()
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y, m, d = now[0], now[1], now[2]
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hh, mm, ss = now[3], now[4], now[5]
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if hh != self.last_hour:
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self.last_hour = hh
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self.do_load()
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self.label_time.set_text("%02d:%02d" % (hh, mm))
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self.label_summary.set_text(weather.summary)
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def do_load(self):
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self.label_summary.set_text("Requesting...")
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weather.fetch()
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‎internal_filesystem/apps/cz.ucw.pavel.weather/res/mipmap-mdpi/icon_64x64.png‎

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