mqtt basic

examples/epd.py

@@ -12,10 +12,32 @@ 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:
+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)
+
+    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")
     
         epd = epd2in13bc.EPD()
@@ -35,8 +57,7 @@ try:
         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)
+        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)
 
@@ -55,10 +76,20 @@ try:
         logging.info("Goto Sleep...")
         epd.sleep()
     
-except IOError as e:
-    logging.info(e)
+    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()
+
+
 
-except KeyboardInterrupt:    
-    logging.info("ctrl + c:")
-    epd2in13bc.epdconfig.module_exit()
-    exit()