MicroPython script to grab @[email protected]'s now playing metadata and display it on a Pimoroni Pico GFX Pack

radio-free-fedi-metadata-display.py

# MicroPython script to grab @[email protected]'s now playing metadata and display it on a Pimoroni Pico GFX Pack
# requires WIFI_CONFIG.py and network_manager.py as outlined at https://github.com/pimoroni/pimoroni-pico/tree/main/micropython/examples/gfx_pack
# see https://fosstodon.org/@axwax/109910396644259122 for details

import WIFI_CONFIG
import time
from gfx_pack import GfxPack
from network_manager import NetworkManager
import urequests
import uasyncio
import re

# set up variables
instance = 'fosstodon.org' # change to your own Mastodon instance
token = '' # your Mastodon API token
account_id = 109822578252506735 # this is the id for @[email protected]

header = {'Authorization': 'Bearer ' + token}
request_url = 'https://' + instance + '/api/v1/accounts/' + str(account_id) + '/statuses?limit=1' # only 
sys_status = "STATUS"
old_status = sys_status

# initialise the display
gp = GfxPack()
display = gp.display
display.set_font("bitmap8")
display.set_backlight(0)
WIDTH, HEIGHT = display.get_bounds()

# update the display
def display_status():
    global sys_status    
    display.set_pen(0)  # Set pen to white
    display.clear()
    display.set_pen(15)
    display.text(sys_status, 0, 0, WIDTH-1, 1)
    display.update()
    

# grab the latest status from @[email protected]
def grab_status():
    global header, old_status, request_url, sys_status
    gp.set_backlight(0, 40, 0) # set backlight to a light green
    res = urequests.get(request_url, headers = header).json()
    
    # filter out any HTML tags and strings we don't want to display
    # (this is very hacky and will break if the bot's toot format changes)
    sys_status = re.sub('<[^>]+>', '', res[0]['content'])
    sys_status = re.sub('Now playing on radio free fedi: ', 'radio free fedi now playing: \n\r', sys_status)
    sys_status = re.sub('Tune in now:', '\n\r', sys_status)
    sys_status = re.sub('your 24/7 community radio from the fediverse to the universe', '\n\r', sys_status)
    sys_status = re.sub(r'(https|http|ftp):\/\/\S+', '\n\r', sys_status)
    
    gp.set_backlight(20, 20, 0) # let's have a mellow yellow backlight
    
    # update the display only if there is new song metadata
    if(sys_status != old_status):
        old_status = sys_status
        gp.set_backlight(0, 150, 0) # a new song deserves a bright green backlight for a few seconds!
        display_status()
        time.sleep(5)
        gp.set_backlight(20, 20, 0) # and we're back to mellow yellow
        #display.update()

def status_handler(mode, status, ip):
    # reports wifi connection status
    global sys_status
    if(status):
        sys_status = 'connected as ' + str(ip)
    else:
        sys_status = 'connecting'
    display_status()
            
# connect to Wifi
try:
    network_manager = NetworkManager(WIFI_CONFIG.COUNTRY, status_handler=status_handler)
    uasyncio.get_event_loop().run_until_complete(network_manager.client(WIFI_CONFIG.SSID, WIFI_CONFIG.PSK))
except Exception as e:
    sys_status = 'Wifi connection failed!'
    display_status()

# grab Metadata from @[email protected] every 20 seconds
while True:
    grab_status()
    time.sleep(20)