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growatt.py
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growatt.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
from pymodbus.client.sync import ModbusSerialClient as ModbusClient
from pymongo import MongoClient
from datetime import datetime
modbus = ModbusClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600, stopbits=1, parity='N', bytesize=8, timeout=1)
modbus.connect()
read_registers = modbus.read_input_registers(0,33)
registers = read_registers.registers
#Status Inverter (Stat) 0=waiting 1=normaal 2=fault
status = registers[0]
if status != 1:
sys.exit()
pv_volts = float(registers[3])/10 #1V
pv_amps = float(registers[4])/10 #1A
pv_watts = float(registers[6])/10 #1W
ac_watts = float(registers[12])/10 #1W
ac_herz = float(registers[13])/100 #1Hz
ac_volts = float(registers[14])/10 #1V
ac_amps = float(registers[15])/10 #1A
total_today = float(registers[27])/10 #1kWh
total = float(registers[29])/10 #1kWh
#Total runtime (Htot-low byte) 0.5S
runtime_low = float(registers[30])
#Total runtime (Htot-high-byte) 0.5S
runtime_high = float(registers[31])
temperature = float(registers[32])/10 #1C
modbus.close()
mongo = MongoClient()
db = mongo.pv
db.growatt.insert(
{
'created_at': datetime.utcnow(),
'status': status,
'pv_volts': pv_volts,
'pv_amps': pv_amps,
'pv_watts': pv_watts,
'ac_watts': ac_watts,
'ac_herz': ac_herz,
'ac_volts': ac_volts,
'ac_amps': ac_amps,
'total_today': total_today,
'total': total,
'runtime_low': runtime_low,
'runtime_high': runtime_high,
'temperature': temperature
}
)