first commit

loop/3_NPM/get_data.py

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+import serial
+import json
+import time
+
+# Initialize serial ports for the three sensors
+ser3 = serial.Serial(
+    port='/dev/ttyAMA3',
+    baudrate=115200,
+    parity=serial.PARITY_EVEN,
+    stopbits=serial.STOPBITS_ONE,
+    bytesize=serial.EIGHTBITS,
+    timeout = 1
+)
+
+ser4 = serial.Serial(
+    port='/dev/ttyAMA4',
+    baudrate=115200,
+    parity=serial.PARITY_EVEN,
+    stopbits=serial.STOPBITS_ONE,
+    bytesize=serial.EIGHTBITS,
+    timeout = 1
+)
+
+ser5 = serial.Serial(
+    port='/dev/ttyAMA5',
+    baudrate=115200,
+    parity=serial.PARITY_EVEN,
+    stopbits=serial.STOPBITS_ONE,
+    bytesize=serial.EIGHTBITS,
+    timeout = 1
+)
+
+# Function to read and parse sensor data
+def read_sensor_data(ser, sonde_id):
+    try:
+        # Send the command to request data (e.g., data for 60 seconds)
+        ser.write(b'\x81\x12\x6D')
+
+        # Read the response
+        byte_data = ser.readline()
+
+        # Extract the state byte and PM data from the response
+        state_byte = int.from_bytes(byte_data[2:3], byteorder='big')
+        state_bits = [int(bit) for bit in bin(state_byte)[2:].zfill(8)]
+        
+        PM1 = int.from_bytes(byte_data[9:11], byteorder='big') / 10
+        PM25 = int.from_bytes(byte_data[11:13], byteorder='big') / 10
+        PM10 = int.from_bytes(byte_data[13:15], byteorder='big') / 10
+
+        # Create a dictionary with the parsed data
+        data = {
+            'sondeID': sonde_id,
+            'PM1': PM1,
+            'PM25': PM25,
+            'PM10': PM10
+        }
+
+        return data
+    except Exception as e:
+        print(f"Error reading from sensor {sonde_id}: {e}")
+        return None
+
+# Function to create a JSON object with all sensor data
+def collect_all_sensor_data():
+    all_data = {}
+
+    # Read data from each sensor and add to the all_data dictionary
+    sensor_data_3 = read_sensor_data(ser3, 'USB2')
+    sensor_data_4 = read_sensor_data(ser4, 'USB3')
+    sensor_data_5 = read_sensor_data(ser5, 'USB4')
+
+    # Store the data for each sensor in the dictionary
+    if sensor_data_3:
+        all_data['sensor_3'] = sensor_data_3
+    if sensor_data_4:
+        all_data['sensor_4'] = sensor_data_4
+    if sensor_data_5:
+        all_data['sensor_5'] = sensor_data_5
+
+    return all_data
+
+# Main script to run once
+if __name__ == "__main__":
+    try:
+        # Collect data from all sensors
+        data = collect_all_sensor_data()
+
+        # Convert data to JSON
+        json_data = json.dumps(data, indent=4)
+
+        # Define the output file path
+        output_file = "/var/www/nebuleair_pro_4g/loop/data.json"  # Change this to your desired file path
+
+        # Write the JSON data to the file
+        with open(output_file, 'w') as file:
+            file.write(json_data)
+        
+        print(f"Data successfully written to {output_file}")
+
+    except Exception as e:
+        print(f"Error: {e}")