Output File (#157)

* added output file to write some values to a text file

* bugfix, return statement was missing and also the description for the example is updated

src/config.py.example

@@ -93,3 +93,18 @@ cpu_thermal_zone = 'cpu'
 # read external sensors for temperature, humidity, pressure etc.
 ext_sensors = False
 #ext_sensors = [["Housing", "ds18b20", "0014531448ff", -300], ["ext2", "sht21", 0, [-300, 0]]] 
+
+# output file
+output_filename = False
+#output_filename = "/dev/shm/mjpeg/user_annotate.txt"
+# a for append or w for write (overwrites content)
+output_mode = "w"
+# define what should be in the output
+def get_content_outputfile():
+    # In this example the values from the ext_sensors are used
+    # the values for the temperature values are rounded to 1 decimal
+    sht21_temp = round(float(ext_sensors[1][3][0]), 1) 
+    sht21_hum = ext_sensors[1][3][1] 
+    ds18b20_temp = round(float(ext_sensors[0][3]), 1) 
+    return f"T: {sht21_temp} 'C; H: {sht21_hum} %% ; T-Rpi: {ds18b20_temp} 'C"
+