MagTag 50 Cent CPI project files

Author: FoamyGuy

MagTag/MagTag_50Cent_CPI/50_cent.bmp

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+# SPDX-FileCopyrightText: 2025 Tim C, written for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+50 Cent Consumer Price Index Tracker
+
+This project illustrates how to fetch CPI data from the
+US Bureau of Labor Statistics API. CPI data from 1994,
+when 50 Cent adopted his moniker, is compared with the latest
+data to determine how much 50 Cent from 1994 is worth today.
+"""
+import json
+import os
+import time
+
+import alarm
+import displayio
+from displayio import OnDiskBitmap, TileGrid, Group
+import supervisor
+from terminalio import FONT
+import wifi
+
+import adafruit_connection_manager
+from adafruit_display_text.text_box import TextBox
+import adafruit_requests
+
+
+# CPI Data URL
+latest_cpi_url = "https://api.bls.gov/publicAPI/v2/timeseries/data/CUUR0000SA0"
+# CUUR0000SA0 the series ID for CPI-U (All items)
+# Note: bls.gov API is limited to 20 requests per day for unregistered users
+
+# CPI value for June 1994
+june_94_cpi = 148.0
+
+# Get WiFi details, ensure these are setup in settings.toml
+ssid = os.getenv("CIRCUITPY_WIFI_SSID")
+password = os.getenv("CIRCUITPY_WIFI_PASSWORD")
+
+# Initalize Wifi, Socket Pool, Request Session
+pool = adafruit_connection_manager.get_radio_socketpool(wifi.radio)
+ssl_context = adafruit_connection_manager.get_radio_ssl_context(wifi.radio)
+requests = adafruit_requests.Session(pool, ssl_context)
+
+try:
+    # Connect to the WiFi network
+    wifi.radio.connect(ssid, password)
+except OSError as ose:
+    print(f"OSError: {ose}")
+print("Wifi connected!")
+
+# Get display reference
+display = supervisor.runtime.display
+
+# Set to portrait orientation
+display.rotation = 0
+
+# Group to hold all visual elements
+main_group = Group()
+
+# Full display sized white background
+white_bg_group = Group(scale=8)
+white_bg_bmp = displayio.Bitmap(display.width // 8, display.height // 8, 1)
+white_bg_palette = displayio.Palette(1)
+white_bg_palette[0] = 0xFFFFFF
+white_bg_tg = TileGrid(bitmap=white_bg_bmp, pixel_shader=white_bg_palette)
+white_bg_group.append(white_bg_tg)
+main_group.append(white_bg_group)
+
+# 50 Cent photo
+photo_bmp = OnDiskBitmap("50_cent.bmp")
+photo_tg = TileGrid(bitmap=photo_bmp, pixel_shader=photo_bmp.pixel_shader)
+main_group.append(photo_tg)
+
+
+def get_latest_cpi_value():
+    """
+    Fetch the latest CPI data from BLS API.
+
+    :return: tuple containing (latest CPI value, month, year)
+    """
+    try:
+        response = requests.get(latest_cpi_url)
+        try:
+            json_data = response.json()
+        except json.decoder.JSONDecodeError as json_error:
+            raise Exception(f"JSON Parse error: {response.text}") from json_error
+
+        latest_data = json_data["Results"]["series"][0]["data"][0]
+
+        return (
+            float(latest_data["value"]),
+            latest_data["periodName"],
+            latest_data["year"],
+        )
+
+    except Exception as e:
+        raise Exception(f"Error fetching data from BLS API: {e}") from e
+
+
+# fetch the latest CPI data
+latest_cpi_value, month, year = get_latest_cpi_value()
+
+# Label for the message below the photo
+message_lbl = TextBox(
+    FONT,
+    128,
+    TextBox.DYNAMIC_HEIGHT,
+    align=TextBox.ALIGN_CENTER,
+    text=f"As of {month} {year}\n50 Cent is worth",
+    color=0x000000,
+    scale=1,
+)
+message_lbl.anchor_point = (0, 0)
+message_lbl.anchored_position = (0, photo_tg.tile_height + 6)
+main_group.append(message_lbl)
+
+# calculate current value of 50 cents from 1994
+current_value = round(50.0 * (latest_cpi_value / june_94_cpi) + 0.5)
+
+# Label for the calculated value
+amount_lbl = TextBox(
+    FONT,
+    128 // 3,
+    TextBox.DYNAMIC_HEIGHT,
+    align=TextBox.ALIGN_CENTER,
+    text=f"{current_value}",
+    color=0x000000,
+    scale=3,
+)
+amount_lbl.anchor_point = (0, 0)
+amount_lbl.anchored_position = (0, photo_tg.tile_height + message_lbl.height + 12)
+main_group.append(amount_lbl)
+
+# Cent label at bottom of display
+cent_lbl = TextBox(
+    FONT,
+    128,
+    TextBox.DYNAMIC_HEIGHT,
+    align=TextBox.ALIGN_CENTER,
+    text="Cent",
+    color=0x000000,
+    scale=1,
+)
+cent_lbl.anchor_point = (0, 1)
+cent_lbl.anchored_position = (0, display.height - 2)
+main_group.append(cent_lbl)
+
+# set main_group showing on the display
+display.root_group = main_group
+display.refresh()
+
+# Sleep for 1 day
+al = alarm.time.TimeAlarm(monotonic_time=time.monotonic() + 86400)
+alarm.exit_and_deep_sleep_until_alarms(al)
+# Does not return. Exits, and restarts after 1 day