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