Adding ISS Pass app

isspass/main.py

@@ -0,0 +1,122 @@
+"""App that estimates time until the ISS next passes over head.
+
+Influenced by EMF Beer. As all things should be.
+"""
+___title___        = "ISS Pass"
+___license___      = "MIT"
+___dependencies___ = ["app", "sleep", "wifi", "http", "ugfx_helper"]
+___categories___   = ["Other"]
+
+import wifi, ugfx, http, ujson, app, sleep, utime
+from tilda import Buttons, LED
+
+orientation = 270
+countdown = 0
+
+def get_data(api_url):
+
+    try:
+        data_json = http.get(api_url).raise_for_status().content
+        data = ujson.loads(data_json)
+        LED(LED.GREEN).on()
+    except: 
+        print('Something has gone wrong')
+
+    return data
+
+def get_time(timestamp):
+    convtime = utime.localtime(timestamp)
+    year = convtime[0]
+    # have to subtract 30yrs as different epochs between open-notify and utime
+    year = year - 30
+    month = convtime[1]
+    day = convtime[2]
+    hour = convtime[3]
+    minute = convtime[4]
+    second = convtime[5]
+    time_str = "%02i:%02i:%02i %i/%i/%4i UTC" % (hour, minute, second, day, month, year)
+    return time_str
+
+def get_seconds(secs):
+    day = secs // (24 * 3600)
+    time = secs % (24 * 3600)
+    hour = secs // 3600
+    secs %= 3600
+    minutes = secs // 60
+    secs %= 60
+    seconds = secs
+    seconds_str = "%dh %dm %ds" % (hour, minutes, seconds)
+    return seconds_str
+
+def get_wait(time1, time2):
+    duration = time1 - time2
+    wait = get_seconds(duration)
+    return wait
+
+def draw_screen():
+    loc_data = get_data("https://freegeoip.app/json/")
+    lat = str(loc_data["latitude"])
+    lon = str(loc_data["longitude"])
+    city = loc_data["city"]
+    country = loc_data["country_name"]
+    iss_data = get_data("http://api.open-notify.org/iss-pass.json?lat=" + lat + "&lon=" + lon)
+    risetime = iss_data['response'][0]['risetime']
+    datetime = iss_data['request']['datetime']
+    countdown = datetime
+    LED(LED.GREEN).off()
+    while countdown < risetime:
+        ugfx.clear(ugfx.BLACK)
+        ugfx.text(5, 5, "When does the ISS next pass?", ugfx.WHITE)
+        ugfx.line(5, 20, ugfx.width(), 20, ugfx.GREY)
+        ugfx.text(5, 35, "Location: " + city + ", " + country, ugfx.WHITE)
+        ugfx.text(5, 50, "Latitude: " + lat, ugfx.WHITE)
+        ugfx.text(5, 65, "Longitude: " + lon, ugfx.WHITE)
+        ugfx.text(5, 80, "Rise time: " + str(get_time(risetime)), ugfx.WHITE)
+        ugfx.text(5, 95, "Duration: " + str(get_seconds(iss_data['response'][0]['duration'])), ugfx.WHITE)
+        countdown +=1
+        ugfx.text(5, 110, "Countdown: " + str(get_wait(risetime, countdown)), ugfx.WHITE)
+        utime.sleep(1)
+    else:
+        LED(LED.GREEN).on()
+        LED(LED.RED).on()
+        utime.sleep(1)
+        LED(LED.GREEN).off()
+        LED(LED.RED).off()
+        draw_screen()
+
+def toggle_orientation():
+
+    global orientation
+    if orientation == 90:
+        ugfx.orientation(270)
+        orientation = 270
+        draw_screen()
+    else:
+        ugfx.orientation(90)
+        orientation = 90
+        draw_screen()
+
+ugfx.init()
+ugfx.clear(ugfx.BLACK)
+ugfx.set_default_font(ugfx.FONT_FIXED)
+
+s=ugfx.Style()
+s.set_enabled([ugfx.WHITE, ugfx.BLACK, ugfx.BLACK, ugfx.GREY])
+s.set_background(ugfx.BLACK)
+ugfx.set_default_style(s)
+
+#Buttons.enable_interrupt(Buttons.BTN_A, lambda button_id:draw_screen(), on_press=True, on_release=False)
+#Buttons.enable_interrupt(Buttons.BTN_B, lambda button_id:toggle_orientation(), on_press=True, on_release=False)
+Buttons.enable_interrupt(Buttons.BTN_Menu, lambda button_id:app.restart_to_default(), on_press=True, on_release=False)
+
+ugfx.text(5, 10, "Estimating position...", ugfx.WHITE)
+ugfx.text(5, 30, "Press Menu to exit", ugfx.WHITE)
+ugfx.text(5, 45, "Countdown clock can drift.", ugfx.WHITE)
+
+draw_screen()
+
+while True:
+    sleep.wfi()
+
+ugfx.clear()
+app.restart_to_default()