125 lines
4.0 KiB
Python
125 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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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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###########
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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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from spidev import SpiDev
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import EPD_driver
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import json
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import netifaces
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mqtt_client_id = "epaper_display"
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#############
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# CALLBACKS #
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#############
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#Callback pour la connection au MQTT : souscriptions aux topics
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def on_connect(client, userdata, flags, rc):
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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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#Callback de gestion des messages arrivant au MQTT :
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# affichage et enregistrement en base de données
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def on_message(client, userdata, msg):
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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] == "AdaBME280_1":
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payload = msg.payload.decode()
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print(payload)
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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 = { 'TA' : 33,
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'HR' : 49,
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'SLPA' : 65
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}
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if val['type'] in coord_type:
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disp.Dis_String(125, coord_type[val['type']], "{} {} ".format(val['value'], val['unit']), 16)
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#Callback particulier pour gérer les date/heure arrivent sur le broker MQTT
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def on_message_date(client, userdata, msg):
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payload = msg.payload.decode()
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print("Date : " + payload)
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try:
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d = datetime.strptime(payload, "%H:%M:%S %d/%m/%Y")
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disp.Dis_String(0, 17, datetime.strftime(d + TimeZone.utcoffset(None), "%d/%m/%Y %H:%M:%S"), 16)
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except:
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disp.Dis_String(0, 17, payload, 16)
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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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def on_message_camera(client, userdata, msg):
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pl = msg.payload.decode()
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print("{} : {} ({})".format(msg.topic, pl, type(pl)))
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if pl == "1" and msg.topic == camera_mqtt_topic + "/shooting" :
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disp.Dis_String(0, 105, "Shooting photo... ", 16)
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if msg.topic == camera_mqtt_topic + "/last_photo":
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disp.Dis_String(0, 105, "Last: " + pl, 16)
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#Callback de déconnexion au broker MQTT
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def on_disconnect(client, userdata, msg):
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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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#init and Clear full screen
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bus = 0
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device = 0
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disp = EPD_driver.EPD_driver(spi=SpiDev(bus, device))
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print("Start display...")
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disp.Dis_Clear_full()
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disp.Dis_Clear_part()
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print("OK")
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#disp.Dis_String(0, 0, "{} | {}".format(socket.gethostname(), netifaces.ifaddresses('wlan0')[2][0]['addr']), 12)
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disp.Dis_String(0, 0, "IPv4 : {}".format(netifaces.ifaddresses('wlan0')[2][0]['addr']), 16)
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disp.Dis_String(0, 33, "Temperature : ", 16)
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disp.Dis_String(0, 49, "Humidity : ", 16)
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disp.Dis_String(0, 65, "Sea Pression : ", 16)
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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("huzzah0/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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