def update_loop(url, interval=0, port=80): """ Download image, update display, sleep, loop. Gives up on any error :param url: :param interval: :param port: :return: """ e = EPD() e.enable() sep = url.find('/') host = url[:sep] path = url[sep:] del sep while True: print("Mem free: %d" % gc.mem_free()) c = Connect(host, port, debug=True) content = c.get_quick(path) print("Uploading...", end='') e.upload_whole_image(content) print("done.") e.display_update() del content del c if interval > 0: to_sleep = interval print("Sleeping for %ds" % interval, end='') time.sleep(to_sleep) print('.') else: input("Press enter to update (Ctrl-C to stop).") gc.collect()
def run(self): woken = self.wifi_pin() self.epd.enable() if not self.check_battery_level(): return False try: self.epd.get_sensor_data() except ValueError: self.log("Can't communicate with display, flashing light and giving up") heartbeat(True) sleep_ms(15000) return True if self.rtc.alarm_left() > 0: self.log("Woken up but the timer is still running, refreshing screen only") self.epd.display_update() self.feed_wdt() return True try: self.cfg = Config.load(sd=self.sd) self.log("Loaded config") except (OSError, ValueError) as e: self.log("Failed to load config: " + str(e)) self.display_no_config() try: self.connect_wifi() except: pass # everything while True: sleep_ms(10) self.feed_wdt() self.feed_wdt() self.connect_wifi() content = b'' try: self.log("Connecting to server %s:%d" % (self.cfg.host, self.cfg.port)) c = Connect(self.cfg.host, self.cfg.port, debug=self.debug) self.feed_wdt() cause = Display.reset_cause() if woken: cause = "user" self.log("Reset cause: " + cause) if len(self.cfg.upload_path) > 0: temp = self.epd.get_sensor_data() # we read this already c.post(self.cfg.upload_path, battery=self.battery.value(), reset=cause, screen=temp) self.log("Fetching metadata from " + self.cfg.metadata_path) metadata = c.get_quick(self.cfg.metadata_path, max_length=1024, path_type='json') # This will set the time to GMT, not localtime self.set_alarm(c.last_fetch_time, metadata) self.feed_wdt() del metadata del self.battery self.log("Fetching image from " + self.cfg.image_path) self.epd.image_erase_frame_buffer() self.feed_wdt() length, socket = c.get_object(self.cfg.image_path) if length != 15016: raise ValueError("Wrong data size for image: %d" % length) self.feed_wdt() except (RuntimeError, ValueError, OSError) as e: self.log("Failed to get remote info: " + str(e)) self.display_cannot_connect() self.rtc.alarm(time=3600000) return True sleep_ms(1000) # How do we make the write to display more reliable? self.feed_wdt() self.log("Uploading to display") self.display_file_image(socket) c.get_object_done() # close off socket if self.cfg.src == "sd": # If we've got a working config from SD instead of flash self.log("Transferring working config") Config.transfer() self.log("SUCCESS") self.log("Finished. Mem free: %d" % gc.mem_free()) return True