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app.py
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app.py
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# pip3 freeze > requirements.txt
import time
from datetime import datetime
import threading
import http.client as httplib
import json
import urllib.request
import sys, os
import subprocess
COMPILE_PC = os.path.sep=="\\"
from utils.utils import *
from mqtt.mqtt_octoprinter import *
from mqtt.mqtt_sensor import *
if COMPILE_PC:
from hardware.rpi_stubs import gpio_stubs as GPIO
else:
import RPi.GPIO as GPIO
from hardware.dht import *
from hardware.rotary_encoder import *
from signage.display_message import *
from signage.hardware_surfaces import *
from printer_sign import *
class ShutdownRequest(IntEnum):
NONE = 0
REBOOT = 1
SHUTDOWN = 2
class App():
def __init__(self):
self.settings = None
self.printer_listener = MQTTPrinterThread(None, on_state_changed=self.on_printer_state_changed)
self.sign_surface = None
if COMPILE_PC:
self.sensor_temp = None
else:
self.sensor_temp = DHTSensor(None, on_state_changed=self.on_temperature_state_changed)
self.all_loops = []
if self.printer_listener is not None:
self.all_loops.append(self.printer_listener)
if self.sensor_temp != None:
self.all_loops.append(self.sensor_temp)
self.mqtt_sensor_array = MQTTSensorArray(sensors=[self.sensor_temp])
self.last_state_change = time.time()
self.last_state = None
self.alt_info_state = 0
self.alt_info_max_state = 4
self.alt_info_time = None
self.alt_info_interval = 5
self.rotary_encoder = None
self.settings_require_save = False
self.shutdown_request = ShutdownRequest.NONE
self.pending_printer_state_change = None
self.monitor_sleep_duration = 1
def on_temperature_state_changed(self,new_state,sensor):
#print("{0}:\t{1}".format(sensor.name, new_state))
pass
def on_printer_state_changed(self, new_state, printer):
self.pending_printer_state_change = (new_state,printer)
def process_pending_printer_state_change(self):
if self.pending_printer_state_change is None:
return
new_state = self.pending_printer_state_change[0]
printer = self.pending_printer_state_change[1]
print("{0}:\t{1}".format(printer.name if printer is not None else "unknown", new_state))
if self.last_state != None and self.last_state.state_code != new_state.state_code:
self.alt_info_state = 0
if self.sign_surface!=None:
self.sign_surface.submit_state_change(new_state=new_state,printer=printer,alt_info_state=self.alt_info_state)
self.last_state_change = time.time()
self.last_state = new_state
self.pending_printer_state_change = None
def main(self):
self.reload_settings()
print("Application settings loaded.")
try:
if self.sign_surface is not None:
self.sign_surface.start()
for threaded_loop in self.all_loops:
threaded_loop.start()
self.mqtt_sensor_array.connect()
self.alt_info_time = time.time()
counter = 0
while self.shutdown_request == ShutdownRequest.NONE:
now = time.time()
start_time = now
self.process_pending_printer_state_change()
elapsed_time = (now - self.alt_info_time)
if elapsed_time >= self.alt_info_interval:
self.alt_info_state += 1
if self.alt_info_state > self.alt_info_max_state:
self.alt_info_state = 0
self.alt_info_time = now
if self.printer_listener is not None:
self.printer_listener.force_state_change()
else:
dummy_state = MQQTPrinterState()
dummy_state.extruder.actual = 50 + counter
dummy_state.bed.actual = 500 - counter
self.on_printer_state_changed(new_state=dummy_state, printer=None)
if self.settings_require_save:
self.save_settings()
time_remaining = self.monitor_sleep_duration - (time.time() - start_time)
if time_remaining > 0:
time.sleep(time_remaining)
else:
print("Cannot keep up with processing rate!")
counter += 1
except KeyboardInterrupt:
print("Execution stopped by user.")
except Exception as e:
print(e)
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_lineno)
finally:
print("Stopping background threads...")
if self.sign_surface is not None:
print("Requesting display surface {0} to stop...".format(self.sign_surface.id))
self.sign_surface.stop()
for threaded_loop in self.all_loops:
threaded_loop.request_stop()
for threaded_loop in self.all_loops:
threaded_loop.join()
self.mqtt_sensor_array.disconnect()
if self.sign_surface is not None:
while not self.sign_surface.is_stopped:
time.sleep(1/25)
print("Background threads stopped.")
if self.rotary_encoder != None:
GPIO.cleanup()
if self.shutdown_request != ShutdownRequest.NONE:
self.execute_shutdown(self.shutdown_request)
def get_settings_filename(self):
dir_path = os.path.dirname(os.path.realpath(__file__))
return "{0}{1}settings.json".format(dir_path,os.path.sep)
def save_settings(self):
try:
if self.settings == None:
self.settings = {}
settings_filename = self.get_settings_filename()
with open(settings_filename,"w") as outfile:
json.dump(self.settings,outfile)
print("Application settings saved: {0}".format(settings_filename))
self.settings_require_save = False
except Exception as e:
log_exception()
def reload_settings(self):
try:
self.settings = {}
settings_filename = self.get_settings_filename()
with open(settings_filename) as file:
self.settings = json.load(file)
print("Application settings loaded: {0}".format(settings_filename))
for threaded_loop in self.all_loops:
threaded_loop.global_settings = self.settings
if "printers" in self.settings:
if self.printer_listener is not None:
self.printer_listener.update_settings(self.settings["printers"][0])
if self.sensor_temp != None and "sensors" in self.settings:
self.sensor_temp.update_settings(self.settings["sensors"][0])
if self.rotary_encoder != None:
self.rotary_encoder.disconnect()
self.rotary_encoder = None
encoder_settings = self.settings["encoder"]
encoder_enabled = encoder_settings["enabled"] == True
if encoder_enabled:
#GPIO.setmode(GPIO.BOARD)
GPIO.setmode(GPIO.BCM)
self.rotary_encoder = RotaryEncoder(
max_value=255, min_value=0, value_per_click=encoder_settings["sensitivity"],
leftPin=encoder_settings["pin_left"], rightPin=encoder_settings["pin_right"], buttonPin=encoder_settings["pin_click"],
on_rotate=self.on_encoder_changed,
on_button_up=self.on_encoder_press,
on_long_press=self.on_encoder_long_press, on_long_press_notify=self.on_encoder_long_press_notify,
on_very_long_press=self.on_encoder_very_long_press, on_very_long_press_notify=self.on_encoder_very_long_press_notify)
print("encoder: enabled")
else:
print("encoder: disabled")
self.mqtt_sensor_array.update_settings(None, self.settings)
assert(self.sign_surface is None)
display_settings = self.settings["display"]
surface_type = display_settings["type"] if "type" in display_settings else "emulator_surface"
if not surface_type in globals():
err_message = "There is no surface class of the type: {0}".format(surface_type)
raise Exception(err_message)
else:
print("Loading display of type: {0}".format(surface_type))
sign_class = globals()[surface_type]
self.sign_surface = sign_class(json_settings=display_settings)
if hasattr(self.sign_surface,"sensor_temp"):
self.sign_surface.sensor_temp = self.sensor_temp
self.sign_surface.initialize()
app_settings = self.settings["app"] if "app" in self.settings else {}
if self.sign_surface != None and "display_brightness" in app_settings:
brightness = int(app_settings["display_brightness"])
if brightness >= 0:
self.sign_surface.brightness = brightness
if self.sign_surface != None and encoder_enabled and self.rotary_encoder != None:
self.rotary_encoder.set_value(self.sign_surface.brightness)
except Exception as e:
log_exception()
def on_encoder_changed(self,new_value, direction):
print("encoder: value={0}\tdirection={1}".format(new_value,"Left" if direction == RotaryEncoder.LEFT else "right"))
if self.sign_surface != None:
self.sign_surface.brightness = new_value
if "app" not in self.settings:
self.settings["app"] = {}
app_settings = self.settings["app"]
app_settings["display_brightness"] = new_value
self.settings_require_save = True
else:
print("encoder: no display!")
def on_encoder_press(self,channel):
print("encoder: pressed")
def on_encoder_long_press_notify(self,channel):
print("encoder: long press notification")
def on_encoder_long_press(self,channel):
print("encoder: long press occurred")
self.shutdown_request = ShutdownRequest.REBOOT
def on_encoder_very_long_press_notify(self,channel):
print("encoder: VERY long press notification")
def on_encoder_very_long_press(self,channel):
print("encoder: VERY long press occurred")
self.shutdown_request = ShutdownRequest.SHUTDOWN
def execute_shutdown(self, request_type):
command = None
command_name = None
app_settings = self.settings["app"] if "app" in self.settings else None
commands = app_settings["commands"] if app_settings is not None else None
if commands is not None:
if request_type == ShutdownRequest.REBOOT:
command_name = "reboot"
elif request_type == ShutdownRequest.SHUTDOWN:
command_name = "shutdown"
if command_name is not None:
command = commands[command_name] if command_name in commands else None
if command != None:
print("encoder: {0} requested".format(command_name))
self.execute_command(command)
def execute_command(self, command):
if command is not None and command != "":
print("executing: {0}".format(command))
process = subprocess.Popen(command.split(),stdout=subprocess.PIPE)
output = process.communicate()[0]
print(output)
if __name__ == "__main__":
app = App()
app.main()