mqtt basic

examples/epd.py

@@ -12,53 +12,84 @@ from waveshare_epd import epd2in13bc
 import time
 from PIL import Image,ImageDraw,ImageFont
 import traceback
+from paho.mqtt import client as mqtt_client
 
 logging.basicConfig(level=logging.DEBUG)
 
-try:
-    logging.info("epd2in13bc Demo")
-    
-    epd = epd2in13bc.EPD()
-    logging.info("init and Clear")
-    epd.init()
-    epd.Clear()
-    time.sleep(1)
-    
-    # Drawing on the image
-    logging.info("Drawing")    
-    font20 = ImageFont.truetype(os.path.join(picdir, 'Font.ttc'), 20)
-    font18 = ImageFont.truetype(os.path.join(picdir, 'Font.ttc'), 18)
-    
-    # Drawing on the Horizontal image
-    logging.info("1.Drawing on the Horizontal image...") 
-    HBlackimage = Image.new('1', (epd.height, epd.width), 255)  # 298*126
-    HRYimage = Image.new('1', (epd.height, epd.width), 255)  # 298*126  ryimage: red or yellow image  
-    drawblack = ImageDraw.Draw(HBlackimage)
-    drawry = ImageDraw.Draw(HRYimage)
-    drawblack.text((10, 0), 'hello world', font = font20, fill = 0)
-    drawblack.text((10, 20), '2.13inch e-Paper bc', font = font20, fill = 0)
-    epd.display(epd.getbuffer(HBlackimage), epd.getbuffer(HRYimage))
-    time.sleep(2)
+broker = 'homeassistant'
+port = 8883
+topic = "openWB/evu/W"
+user = "mqtt-user"
+pw = "phio6yiR9ohs1veeghu4WaeGhaiRi8he4EiWasheev4faeku8tohdiuthah7zahP"
+client_id = "solarmonitor"
 
+def connect_mqtt() -> mqtt_client:
+    def on_connect(client, userdata, flags, rc):
+        if rc == 0:
+            print("Connected to MQTT Broker!")
+        else:
+            print("Failed to connect, return code %d\n", rc)
 
-    logging.info("4.read bmp file on window")
-    blackimage1 = Image.new('1', (epd.height, epd.width), 255)  # 298*126
-    redimage1 = Image.new('1', (epd.height, epd.width), 255)  # 298*126    
-    newimage = Image.open(os.path.join(picdir, 'elektrizitat.bmp'))
-    blackimage1.paste(newimage, (10,10))    
-    epd.display(epd.getbuffer(blackimage1), epd.getbuffer(redimage1))
+    client = mqtt_client.Client(client_id)
+    client.username_pw_set(username, password)
+    client.on_connect = on_connect
+    client.connect(broker, port)
+    return client
+
+def subscribe(client: mqtt_client):
+    def on_message(client, userdata, msg):
+        logging.info("epd2in13bc Demo")
     
-    logging.info("Clear...")
-    epd.init()
-    epd.Clear()
-    
-    logging.info("Goto Sleep...")
-    epd.sleep()
+        epd = epd2in13bc.EPD()
+        logging.info("init and Clear")
+        epd.init()
+        epd.Clear()
+        time.sleep(1)
         
-except IOError as e:
-    logging.info(e)
+        # Drawing on the image
+        logging.info("Drawing")    
+        font20 = ImageFont.truetype(os.path.join(picdir, 'Font.ttc'), 20)
+        font18 = ImageFont.truetype(os.path.join(picdir, 'Font.ttc'), 18)
+        
+        # Drawing on the Horizontal image
+        logging.info("1.Drawing on the Horizontal image...") 
+        HBlackimage = Image.new('1', (epd.height, epd.width), 255)  # 298*126
+        HRYimage = Image.new('1', (epd.height, epd.width), 255)  # 298*126  ryimage: red or yellow image  
+        drawblack = ImageDraw.Draw(HBlackimage)
+        drawry = ImageDraw.Draw(HRYimage)
+        drawblack.text((10, 0), 'Received `{msg.payload.decode()}` from `{msg.topic}` topic', font = font20, fill = 0)
+        epd.display(epd.getbuffer(HBlackimage), epd.getbuffer(HRYimage))
+        time.sleep(2)
+
+
+        logging.info("4.read bmp file on window")
+        blackimage1 = Image.new('1', (epd.height, epd.width), 255)  # 298*126
+        redimage1 = Image.new('1', (epd.height, epd.width), 255)  # 298*126    
+        newimage = Image.open(os.path.join(picdir, 'elektrizitat.bmp'))
+        blackimage1.paste(newimage, (10,10))    
+        epd.display(epd.getbuffer(blackimage1), epd.getbuffer(redimage1))
+        
+        logging.info("Clear...")
+        epd.init()
+        epd.Clear()
+        
+        logging.info("Goto Sleep...")
+        epd.sleep()
     
-except KeyboardInterrupt:    
-    logging.info("ctrl + c:")
-    epd2in13bc.epdconfig.module_exit()
-    exit()
+    print(f"Received `{msg.payload.decode()}` from `{msg.topic}` topic")
+
+    client.subscribe(topic)
+    client.on_message = on_message
+
+
+def run():
+    client = connect_mqtt()
+    subscribe(client)
+    client.loop_forever()
+
+
+if __name__ == '__main__':
+    run()
+
+
+