update

envea/read_value_loop_json.py

@@ -0,0 +1,127 @@
+"""
+Main loop to gather data from Envea Sensors
+
+Runs every minute via cron:
+
+* * * * * /usr/bin/python3 /var/www/nebuleair_pro_4g/envea/read_value_loop_json.py
+
+Saves data as JSON inside: /var/www/nebuleair_pro_4g/envea/data/data.json
+"""
+
+import json
+import serial
+import time
+import traceback
+from datetime import datetime
+
+# Function to load config data
+def load_config(config_file):
+    try:
+        with open(config_file, 'r') as file:
+            return json.load(file)
+    except Exception as e:
+        print(f"Error loading config file: {e}")
+        return {}
+
+# Function to save data to a JSON file
+def save_data_to_json(filename, data):
+    try:
+        with open(filename, 'w') as file:
+            json.dump(data, file, indent=4)
+        print(f"Data saved to {filename}")
+    except Exception as e:
+        print(f"Error saving to file {filename}: {e}")
+
+# Define the config file path
+config_file = '/var/www/nebuleair_pro_4g/config.json'
+
+# Load configuration data
+config = load_config(config_file)
+
+# Initialize sensors and serial connections
+envea_sondes = config.get('envea_sondes', [])
+connected_envea_sondes = [sonde for sonde in envea_sondes if sonde.get('connected', False)]
+serial_connections = {}
+
+if connected_envea_sondes:
+    for device in connected_envea_sondes:
+        port = device.get('port', 'Unknown')
+        name = device.get('name', 'Unknown')
+        try:
+            serial_connections[name] = serial.Serial(
+                port=f'/dev/{port}',
+                baudrate=9600,
+                parity=serial.PARITY_NONE,
+                stopbits=serial.STOPBITS_ONE,
+                bytesize=serial.EIGHTBITS,
+                timeout=1
+            )
+        except serial.SerialException as e:
+            print(f"Error opening serial port for {name}: {e}")
+
+# Function to gather data from sensors
+def gather_data():
+    global data_h2s, data_no2, data_o3
+    data_h2s = 0
+    data_no2 = 0
+    data_o3 = 0
+
+    try:
+        if connected_envea_sondes:
+            for device in connected_envea_sondes:
+                name = device.get('name', 'Unknown')
+                coefficient = device.get('coefficient', 1)
+                if name in serial_connections:
+                    serial_connection = serial_connections[name]
+                    try:
+                        serial_connection.write(
+                            b"\xFF\x02\x13\x30\x01\x02\x03\x04\x05\x06\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x12\xAF\x88\x03"
+                        )
+                        data_envea = serial_connection.readline()
+                        if len(data_envea) >= 20:
+                            byte_20 = data_envea[19] * coefficient
+                            if name == "h2s":
+                                data_h2s = byte_20
+                            elif name == "no2":
+                                data_no2 = byte_20
+                            elif name == "o3":
+                                data_o3 = byte_20
+                    except serial.SerialException as e:
+                        print(f"Error communicating with {name}: {e}")
+    except Exception as e:
+        print("An error occurred while gathering data:", e)
+        traceback.print_exc()
+
+# Main loop
+if __name__ == "__main__":
+    h2s_values = []
+    no2_values = []
+    o3_values = []
+
+    for cycle in range(6):  # Run 6 times
+        gather_data()
+        h2s_values.append(data_h2s)
+        no2_values.append(data_no2)
+        o3_values.append(data_o3)
+
+        print(f"Cycle {cycle + 1}:")
+        print(f"  H2S: {data_h2s}, NO2: {data_no2}, O3: {data_o3}")
+        time.sleep(9)  # Wait 9 seconds
+
+    # Compute the mean values (as integers)
+    mean_h2s = int(sum(h2s_values) / len(h2s_values)) if h2s_values else 0
+    mean_no2 = int(sum(no2_values) / len(no2_values)) if no2_values else 0
+    mean_o3 = int(sum(o3_values) / len(o3_values)) if o3_values else 0
+
+    # Create JSON structure
+    data_json = {
+        "h2s": mean_h2s,
+        "no2": mean_no2,
+        "o3": mean_o3
+    }
+
+    # Define JSON file path
+    output_file = "/var/www/nebuleair_pro_4g/envea/data/data.json"
+
+    # Save to JSON file
+    save_data_to_json(output_file, data_json)