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215
MPPT/read.py
215
MPPT/read.py
@@ -1,12 +1,215 @@
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import serial
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'''
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__ __ ____ ____ _____
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def read_vedirect(port='/dev/serial0', baudrate=19200):
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Chargeur solaire Victron MPPT interface UART
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typical response from uart:
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PID 0xA075 ->product ID
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FW 164 ->firmware version
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SER# HQ2249VJV9W ->serial num
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V 13310 ->Battery voilatage in mV
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I -130 ->Battery current in mA (negative means its discharging)
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VPV 10 ->Solar Panel voltage
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PPV 0 ->Solar Panel power (in W)
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CS 0 ->Charger status (0=off, 2=Bulk, 3=Absorbtion, 4=Float)
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MPPT 0 ->MPPT (Maximum Power Point Tracking) state: 0 = Off, 1 = Active, 2 = Not tracking
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OR 0x00000001
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ERR 0
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LOAD ON
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IL 100
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H19 18 ->historical data (Total energy absorbed in kWh)
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H20 0 -> Total energy discharged in kWh
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H21 0
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H22 9
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H23 92
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HSDS 19
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Checksum u
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sudo /usr/bin/python3 /var/www/nebuleair_pro_4g/MPPT/read.py
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'''
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import serial
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import time
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import sqlite3
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# Connect to the SQLite database
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conn = sqlite3.connect("/var/www/nebuleair_pro_4g/sqlite/sensors.db")
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cursor = conn.cursor()
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def read_vedirect(port='/dev/ttyAMA4', baudrate=19200, timeout=20, max_attempts=3):
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"""
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Read and parse data from Victron MPPT controller with retry logic
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Returns parsed data as a dictionary or None if all attempts fail
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"""
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required_keys = ['V', 'I', 'VPV', 'PPV', 'CS'] # Essential keys we need
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for attempt in range(max_attempts):
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try:
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print(f"Attempt {attempt+1} of {max_attempts}...")
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ser = serial.Serial(port, baudrate, timeout=1)
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while True:
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# Initialize data dictionary and tracking variables
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data = {}
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start_time = time.time()
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while time.time() - start_time < timeout:
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line = ser.readline().decode('utf-8', errors='ignore').strip()
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if line:
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print(line) # Raw data from Victron
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if not line:
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continue
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# Check if line contains a key-value pair
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if '\t' in line:
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key, value = line.split('\t', 1)
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data[key] = value
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print(f"{key}: {value}")
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else:
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print(f"Info: {line}")
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# Check if we have a complete data block
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if 'Checksum' in data:
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# Check if we have all required keys
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missing_keys = [key for key in required_keys if key not in data]
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if not missing_keys:
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ser.close()
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return data
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else:
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print(f"Incomplete data, missing: {', '.join(missing_keys)}")
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# Clear data and continue reading
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data = {}
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# Timeout occurred
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print(f"Timeout on attempt {attempt+1}: Could not get complete data")
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ser.close()
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# Add small delay between attempts
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if attempt < max_attempts - 1:
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print("Waiting before next attempt...")
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time.sleep(2)
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except Exception as e:
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print(f"Error on attempt {attempt+1}: {e}")
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try:
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ser.close()
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except:
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pass
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print("All attempts failed")
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return None
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def parse_values(data):
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"""Convert string values to appropriate types"""
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if not data:
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return None
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parsed = {}
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# Define conversions for each key
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conversions = {
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'PID': str,
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'FW': int,
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'SER#': str,
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'V': lambda x: float(x)/1000, # Convert mV to V
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'I': lambda x: float(x)/1000, # Convert mA to A
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'VPV': lambda x: float(x)/1000 if x != '---' else 0, # Convert mV to V
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'PPV': int,
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'CS': int,
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'MPPT': int,
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'OR': str,
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'ERR': int,
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'LOAD': str,
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'IL': int,
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'H19': int, # Total energy absorbed in kWh
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'H20': int, # Total energy discharged in kWh
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'H21': int,
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'H22': int,
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'H23': int,
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'HSDS': int
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}
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# Convert values according to their type
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for key, value in data.items():
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if key in conversions:
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try:
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parsed[key] = conversions[key](value)
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except (ValueError, TypeError):
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parsed[key] = value # Keep as string if conversion fails
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else:
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parsed[key] = value
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return parsed
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def get_charger_status(cs_value):
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"""Convert CS numeric value to human-readable status"""
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status_map = {
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0: "Off",
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1: "Low power mode",
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2: "Fault",
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3: "Bulk",
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4: "Absorption",
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5: "Float",
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6: "Storage",
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7: "Equalize",
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9: "Inverting",
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11: "Power supply",
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245: "Starting-up",
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247: "Repeated absorption",
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252: "External control"
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}
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return status_map.get(cs_value, f"Unknown ({cs_value})")
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if __name__ == "__main__":
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read_vedirect()
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# Read data (with retry logic)
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raw_data = read_vedirect()
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if raw_data:
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# Parse data
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parsed_data = parse_values(raw_data)
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if parsed_data:
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# Check if we have valid battery voltage
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if parsed_data.get('V', 0) > 0:
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print("\n===== MPPT Summary =====")
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print(f"Battery: {parsed_data.get('V', 0):.2f}V, {parsed_data.get('I', 0):.2f}A")
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print(f"Solar: {parsed_data.get('VPV', 0):.2f}V, {parsed_data.get('PPV', 0)}W")
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print(f"Charger status: {get_charger_status(parsed_data.get('CS', 0))}")
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# Save to SQLite
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cursor.execute("SELECT * FROM timestamp_table LIMIT 1")
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row = cursor.fetchone()
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rtc_time_str = row[1]
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# Extract values
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battery_voltage = parsed_data.get('V', 0)
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battery_current = parsed_data.get('I', 0)
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solar_voltage = parsed_data.get('VPV', 0)
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solar_power = parsed_data.get('PPV', 0)
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charger_status = parsed_data.get('CS', 0)
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try:
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cursor.execute('''
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INSERT INTO data_MPPT (timestamp, battery_voltage, battery_current, solar_voltage, solar_power, charger_status)
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VALUES (?, ?, ?, ?, ?, ?)''',
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(rtc_time_str, battery_voltage, battery_current, solar_voltage, solar_power, charger_status))
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conn.commit()
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print("MPPT data saved successfully!")
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except Exception as e:
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print(f"Database error: {e}")
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else:
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print("Invalid data: Battery voltage is zero or missing")
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else:
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print("Failed to parse data")
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else:
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print("No valid data received from MPPT controller")
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# Always close the connection
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conn.close()
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@@ -5,6 +5,8 @@
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"RTC/save_to_db.py": true,
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"BME280/get_data_v2.py": true,
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"envea/read_value_v2.py": false,
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"MPPT/read.py": false,
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"windMeter/read.py": false,
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"sqlite/flush_old_data.py": true,
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"deviceID": "XXXX",
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"npm_5channel": false,
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@@ -49,6 +49,11 @@ CSV PAYLOAD (AirCarto Servers)
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17 -> PM 5.0μm to 10μm quantity (Nb/L)
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18 -> NPM temp inside
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19 -> NPM hum inside
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20 -> battery_voltage
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21 -> battery_current
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22 -> solar_voltage
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23 -> solar_power
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24 -> charger_status
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JSON PAYLOAD (Micro-Spot Servers)
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Same as NebuleAir wifi
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@@ -115,7 +120,7 @@ if uptime_seconds < 120:
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sys.exit()
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#Payload CSV to be sent to data.nebuleair.fr
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payload_csv = [None] * 25
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payload_csv = [None] * 30
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#Payload JSON to be sent to uSpot
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payload_json = {
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"nebuleairid": "XXX",
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@@ -210,6 +215,9 @@ baudrate = config.get('SaraR4_baudrate', 115200) #baudrate du
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device_id = config.get('deviceID', '').upper() #device ID en maj
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bme_280_config = config.get('BME280/get_data_v2.py', False) #présence du BME280
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envea_cairsens= config.get('envea/read_value_v2.py', False)
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mppt_charger= config.get('MPPT/read.py', False)
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wind_meter= config.get('windMeter/read.py', False)
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send_aircarto = config.get('send_aircarto', True) #envoi sur AirCarto (data.nebuleair.fr)
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send_uSpot = config.get('send_uSpot', False) #envoi sur MicroSpot ()
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selected_networkID = int(config.get('SARA_R4_neworkID', 0))
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@@ -355,7 +363,7 @@ try:
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#NextPM 5 channels
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if npm_5channel:
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print("➡️Getting NextPM 5 channels values (last 6 measures)")
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cursor.execute("SELECT * FROM data_NPM_5channels ORDER BY timestamp DESC LIMIT 6")
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cursor.execute("SELECT * FROM data_NPM_5channels ORDER BY rowid DESC LIMIT 6")
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rows = cursor.fetchall()
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# Exclude the timestamp column (assuming first column is timestamp)
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data_values = [row[1:] for row in rows] # Exclude timestamp
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@@ -373,7 +381,7 @@ try:
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#BME280
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if bme_280_config:
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print("➡️Getting BME280 values")
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cursor.execute("SELECT * FROM data_BME280 ORDER BY timestamp DESC LIMIT 1")
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cursor.execute("SELECT * FROM data_BME280 ORDER BY rowid DESC LIMIT 1")
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last_row = cursor.fetchone()
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if last_row:
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print("SQLite DB last available row:", last_row)
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@@ -396,7 +404,7 @@ try:
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#envea
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if envea_cairsens:
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print("➡️Getting envea cairsens values")
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cursor.execute("SELECT * FROM data_envea ORDER BY timestamp DESC LIMIT 6")
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cursor.execute("SELECT * FROM data_envea ORDER BY rowid DESC LIMIT 6")
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rows = cursor.fetchall()
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# Exclude the timestamp column (assuming first column is timestamp)
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data_values = [row[1:] for row in rows] # Exclude timestamp
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@@ -420,6 +428,31 @@ try:
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payload_json["sensordatavalues"].append({"value_type": "CAIRSENS_NO2", "value": str(averages[1])})
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payload_json["sensordatavalues"].append({"value_type": "CAIRSENS_NH3", "value": str(averages[2])})
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#Wind meter
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if wind_meter:
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print("➡️Getting wind meter values")
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#MPPT charger
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if mppt_charger:
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print("➡️Getting MPPT charger values")
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cursor.execute("SELECT * FROM data_MPPT ORDER BY rowid DESC LIMIT 1")
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last_row = cursor.fetchone()
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if last_row:
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print("SQLite DB last available row:", last_row)
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battery_voltage = last_row[1]
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battery_current = last_row[2]
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solar_voltage = last_row[3]
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solar_power = last_row[4]
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charger_status = last_row[5]
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#Add data to payload CSV
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payload_csv[20] = battery_voltage
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payload_csv[21] = battery_current
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payload_csv[22] = solar_voltage
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payload_csv[23] = solar_power
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payload_csv[24] = charger_status
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else:
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print("No data available in the database.")
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print("Verify SARA R4 connection")
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@@ -86,6 +86,7 @@ SCRIPTS = [
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("envea/read_value_v2.py", 10, 0), # Get NPM data (modbus 5 channels) every 10s, with 2s delay
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("loop/SARA_send_data_v2.py", 60, 1), # Send data every 60 seconds, with 2s delay
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("BME280/get_data_v2.py", 120, 0), # Get BME280 data every 120 seconds, no delay
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("MPPT/read.py", 120, 0), # Get MPPT data every 120 seconds, no delay
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("sqlite/flush_old_data.py", 86400, 0) # flush old data inside db every day ()
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]
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@@ -30,8 +30,6 @@ cursor.execute("""
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VALUES (1, CURRENT_TIMESTAMP);
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""")
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# Create a table NPM
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cursor.execute("""
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CREATE TABLE IF NOT EXISTS data_NPM (
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@@ -78,6 +76,26 @@ CREATE TABLE IF NOT EXISTS data_NPM_5channels (
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)
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""")
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# Create a table WIND
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cursor.execute("""
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CREATE TABLE IF NOT EXISTS data_WIND (
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timestamp TEXT,
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wind_speed REAL,
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wind_direction REAL
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)
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""")
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# Create a table MPPT
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cursor.execute("""
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CREATE TABLE IF NOT EXISTS data_MPPT (
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timestamp TEXT,
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battery_voltage REAL,
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battery_current REAL,
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solar_voltage REAL,
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solar_power REAL,
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charger_status INTEGER
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)
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""")
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# Commit and close the connection
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@@ -14,6 +14,7 @@ data_NPM_5channels
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data_BME280
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data_envea
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timestamp_table
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data_MPPT
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'''
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