Some small improvements

src/actions.py

@@ -1,7 +1,7 @@
 import asyncio
 from datetime import datetime
 import os
-from config import climate_log_file, dht22_pin
+from config import climate_log_file, dht22_pin, mhz19co2_serial_port
 
 from handler.dht22_climate import Dht22Climate
 from handler.matrix_display import MatrixDisplay
@@ -9,7 +9,7 @@ from handler.mhz19_co2 import Mhz19Co2
 
 
 climate_sensor = Dht22Climate(dht22_pin)
-co2_sensor = Mhz19Co2()
+co2_sensor = Mhz19Co2(mhz19co2_serial_port)
 matrix_display = MatrixDisplay()
 
 

src/config.py

@@ -1,2 +1,3 @@
 dht22_pin = 17
+mhz19co2_serial_port = "/dev/serial0"
 climate_log_file = "./climate.csv"

src/handler/mhz19_co2.py

@@ -1,11 +1,13 @@
 import serial
+import logging
 
 
 class Mhz19Co2:
-    def __init__(self):
+
+    def __init__(self, serial_port: str):
         self.last_read = None
 
-        self.serial_port = "/dev/serial0"
+        self.serial_port = serial_port
         self.baud_rate = 9600
         self.byte_size = 8
         self.parity = "N"
@@ -56,7 +58,8 @@ class Mhz19Co2:
             # print(f"")
 
         except Exception as e:
-            print(f"Error reading data: {e}")
+            logging.exception(f"Error reading data: {e}", exc_info=e)
+            return None
         finally:
             if ser:
                 ser.close()

src/main.py

@@ -8,7 +8,6 @@ from fastapi.middleware.cors import CORSMiddleware
 from actions import (
     climate_sensor,
     display_time,
-    log_climate,
     matrix_display,
     display_pattern,
     co2_sensor,