224 lines
7.2 KiB
Python
224 lines
7.2 KiB
Python
#!/usr/bin/python3
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# -*- coding: UTF8 -*-
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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Display data from MQTT broker on ePaper screen
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@author: arofarn
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"""
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__version__ = 0.2
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###########
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# IMPORTS #
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###########
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from cameteo_conf import *
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import paho.mqtt.client as mqtt
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import time
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import json
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import netifaces, socket
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import epd2in13
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from PIL import Image
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from PIL import ImageDraw
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from PIL import ImageFont
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mqtt_client_id = "epaper_display"
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# Colors codes
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white = 255
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black = 0
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def update_epd():
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"""
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Update ePaper Display
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"""
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#rotation de l'image de 90° + 180° si le paramètre epd_rotate est différent de 0
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# la translation permet de rattraper un petit décalage en cas de rotation de 90+180°
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screen = image.rotate(90 + (epd_rotate * 180), expand=True, translate=(-6*epd_rotate, 0))
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#Mis en memoire de l'image à afficher et affichage de l'image
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epd.set_frame_memory(screen, 0, 0)
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epd.display_frame()
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#############
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# CALLBACKS #
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#############
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def on_connect(client, userdata, flags, rc):
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"""
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Callback pour la connection au MQTT : souscriptions aux topics
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"""
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print(mqtt.connack_string(rc))
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if rc == 0:
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print("Subscribing to %s ..." % mqtt_topic)
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client.subscribe([(mqtt_topic, 0),
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(camera_mqtt_topic + "/#", 0)]
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)
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print("OK")
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def on_message(client, userdata, msg):
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"""
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Callback de gestion des messages arrivant au MQTT :
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affichage et enregistrement en base de données
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"""
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top=msg.topic[len(mqtt_topic)-1:].strip()
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subtopics = top.split("/")
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if subtopics[0] == "BME":
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payload = msg.payload.decode()
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val = json.loads(payload)
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#Test présence et cohérence de la valeur
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try:
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val['value'] = float(val['value'] )
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except:
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print("Value error: {}".format(val['value']))
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val['value'] = float('nan')
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#Gestion du symbole des degrés parfois difficile pour certaines sources
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val['unit'] = val['unit'].replace('deg', '°')
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#Affichage des données
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coord_type = { 'AT' : (12, 50),
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'RH' : (137, 50),
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'AP' : (12, 72),
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'ALTI' : (137, 72),
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}
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print(val)
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if val['type'] in coord_type:
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#erase former text
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draw.rectangle(coord_type[val['type']] + (coord_type[val['type']][0] + 112, coord_type[val['type']][1] + 20), fill=white)
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#draw new values
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draw.text(coord_type[val['type']],
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"{:6.1f}{} ".format(val['value'], val['unit']),
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font=font20_bold,
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fill=black)
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update_epd()
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# Print feather's date and time on epaper display
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elif subtopics[0] == "SYS":
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payload = msg.payload.decode()
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val = json.loads(payload)
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if val['type'] == "TIME":
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try:
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#Mise en forme de la date et heure reçu pour fuseau horaire configuré
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dt_texte = datetime.strftime(datetime.strptime(val['value'], "%Y/%m/%d_%H:%M:%S") + TimeZone.utcoffset(None),
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"%d/%m/%Y %H:%M:%S")
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except:
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dt_texte = payload
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print(dt_texte)
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draw.rectangle((0, 34, epd2in13.EPD_HEIGHT, 48), fill=white)
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draw.text((0, 34), dt_texte, font=font14, fill=black)
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update_epd()
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def on_message_camera(client, userdata, msg):
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"""
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Update display with info from camera (camera shooting new photo or name of the
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last photo)
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"""
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pl = msg.payload.decode()
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print("{} : {} ({})".format(msg.topic, pl, type(pl)))
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# Photo en cours
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if pl == "1" and msg.topic == camera_mqtt_topic + "/shooting" :
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draw.rectangle((0, 106, epd2in13.EPD_HEIGHT, epd2in13.EPD_WIDTH), fill=white)
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draw.text((0, 106), "Shooting photo... ", font=font14, fill=black)
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update_epd()
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#Dernière photo prise
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if msg.topic == camera_mqtt_topic + "/last_photo":
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draw.rectangle((0, 106, epd2in13.EPD_HEIGHT, epd2in13.EPD_WIDTH), fill=white)
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draw.text((0, 106), "Last: " + pl, font=font14, fill=black)
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update_epd()
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def on_disconnect(client, userdata, msg):
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"""
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Callback de déconnexion au broker MQTT
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"""
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if msg != 0:
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print("Déconnexion imprévu : %s" % msg)
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exit()
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########
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# Main #
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########
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#Screen init.
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epd = epd2in13.EPD()
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epd.init(epd.lut_full_update)
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#List of TrueType fonts
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font12 = ImageFont.truetype(epd_font_file, 12)
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font14 = ImageFont.truetype(epd_font_file, 14)
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font16 = ImageFont.truetype(epd_font_file, 16)
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font20 = ImageFont.truetype(epd_font_file, 20)
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font12_bold = ImageFont.truetype(epd_bold_font_file, 12)
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font14_bold = ImageFont.truetype(epd_bold_font_file, 14)
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font16_bold = ImageFont.truetype(epd_bold_font_file, 16)
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font20_bold = ImageFont.truetype(epd_bold_font_file, 20)
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#font12_obl = ImageFont.truetype(epd_italic_font_file, 12)
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#font14_obl = ImageFont.truetype(epd_italic_font_file, 14)
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#font16_obl = ImageFont.truetype(epd_italic_font_file, 16)
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#New image buffer
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# Memo : 0=black, 255= white/blank
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image = Image.new('1', (epd2in13.EPD_HEIGHT, epd2in13.EPD_WIDTH), 255)
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draw = ImageDraw.Draw(image)
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#Draw basic text and frame :
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draw.rectangle((0, 0, epd2in13.EPD_HEIGHT, 18), fill=black)
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draw.text((60, 1),
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"Projet Camétéo",
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font=font16_bold,
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fill=white)
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draw.text((0, 19),
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"{} : IP= {}".format(socket.gethostname(),
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netifaces.ifaddresses('wlan0')[2][0]['addr']),
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font = font12,
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fill=black )
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draw.line((0,49,epd2in13.EPD_HEIGHT, 49), fill=black)
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draw.line((0,71,epd2in13.EPD_HEIGHT, 71), fill=black)
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draw.line((0,93,epd2in13.EPD_HEIGHT, 93), fill=black)
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draw.line((125, 49, 125, 93), fill=black)
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#Display on ePaper screen
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epd.clear_frame_memory(0xFF)
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update_epd()
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#
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#screen = image.rotate(90, expand=True)
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#epd.set_frame_memory(screen, 0, 0)
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#epd.display_frame()
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#Toggle to partial refresh
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epd.init(epd.lut_partial_update)
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#Connect to MQTT broker and loop...
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mqtt_client = mqtt.Client(mqtt_client_id, clean_session=True)
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mqtt_client.username_pw_set(mqtt_user, mqtt_pass)
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mqtt_client.on_connect = on_connect
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mqtt_client.on_message = on_message
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mqtt_client.on_disconnect = on_disconnect
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#mqtt_client.message_callback_add("feather0/NTP/date", on_message_date)
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mqtt_client.message_callback_add(camera_mqtt_topic + "/#", on_message_camera)
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print(mqtt_host + ":" + str(mqtt_port))
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mqtt_client.connect(mqtt_host, int(mqtt_port), 60)
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mqtt_client.loop_forever()
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