From a4745ab9e5f838a627fa874dea72320facd2a7d2 Mon Sep 17 00:00:00 2001
From: pallago <67544460+pallago@users.noreply.github.com>
Date: Fri, 6 Dec 2024 23:51:32 +0100
Subject: [PATCH] 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 | 15 +++++++++++++++
 src/rpi-cpu2mqtt.py   | 18 ++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/config.py.example b/src/config.py.example
index ab74267..d95b085 100644
--- a/src/config.py.example
+++ b/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"
+
diff --git a/src/rpi-cpu2mqtt.py b/src/rpi-cpu2mqtt.py
index baf6af3..9a90923 100644
--- a/src/rpi-cpu2mqtt.py
+++ b/src/rpi-cpu2mqtt.py
@@ -917,6 +917,24 @@ def gather_and_send_info():
         if args.display:
             print_measured_values(monitored_values)
 
+        # write some output to a file
+        if config.output_filename:
+            # the only options are "a" for append or "w" for (over)write
+            # check if one of this options is defined
+            if config.output_mode not in ["a", "w"]:
+                print("Error, output_type not known. Default w is set.")
+                config.output_type = "w"
+            try:
+                # open the text file
+                output_file = open(config.output_filename, config.output_mode)
+                # read what should be written into the textfile
+                # we need to define this is a function, otherwise the values are not updated and default values are taken
+                output_content = config.get_content_outputfile()
+                output_file.write(output_content)
+                output_file.close()
+            except Exception as e:
+                print("Error writing to output file:", e)
+
         if args.hass_api:
             publish_to_hass_api(monitored_values)
         else: