Describe docker compose example

ReadMe.md

@@ -38,3 +38,22 @@ Set the following parameter:
 
 
  ```docker run -t -i --device=/dev/ttyUSB0 -e SERIAL_DEVICE="/dev/ttyUSB0" -e MQTT_SERVER="192.168.x.y" -e MQTT_TOPIC="testtopic/" sha256:```
+
+#### Execution via Docker Compose
+```
+# template docker-compose.yml
+services:
+    python_app:
+        attach: false
+        build:
+            context: .
+            dockerfile: Dockerfile
+        environment:
+        - SERIAL_DEVICE=/dev/ttyUSB0
+        - MQTT_SERVER=192.168.x.y
+        - MQTT_TOPIC=testtopic/
+        devices:
+        - "/dev/ttyUSB0:/dev/ttyUSB0"
+```
+build image: **docker-compose up --build**
+start with **docker-compose up --detach**

mqttclient/.gitignore

@@ -0,0 +1 @@
+docker-compose.yml

mqttclient/fanATserial2mqtt.py

@@ -77,7 +77,7 @@ try:
                 continue
         except (serial.SerialException):
             client.publish(mqtt_topic + "exception", "serial reopen") # check which port was really used
-            time.sleep(1.0)
+            time.sleep(3.0)
 
         try:
             line = ser.readline()   # read a '\n' terminated line
@@ -149,7 +149,7 @@ try:
             else:
                 client.publish(mqtt_topic + "debug", line) # line was invalid and could not be parsed
         else:
-            time.sleep(0.2)
+            time.sleep(0.5)
 
 except (KeyboardInterrupt, SystemExit):
     print("User aborted service ...")