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""""
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ModBus control routines
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Copyright (C) 2023 M.T. Konstapel
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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import minimalmodbus
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import serial
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from retrying import retry
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#from epevermodbus.extract_bits import extract_bits
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class EpeverChargeController(minimalmodbus.Instrument):
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"""Instrument class for Epever Charge Controllers.
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Args:
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* portname (str): port name
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* slaveaddress (int): slave address in the range 1 to 247
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"""
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def __init__(self, portname, slaveaddress):
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minimalmodbus.Instrument.__init__(self, portname, slaveaddress)
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self.serial.baudrate = 9600
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self.serial.bytesize = 8
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self.serial.parity = serial.PARITY_NONE
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self.serial.stopbits = 1
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self.serial.timeout = 1
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self.mode = minimalmodbus.MODE_RTU
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self.clear_buffers_before_each_transaction = True
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@retry(wait_fixed=200, stop_max_attempt_number=5)
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def retriable_read_register(
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self, registeraddress, number_of_decimals, functioncode
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):
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return self.read_register(
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registeraddress, number_of_decimals, functioncode, False
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)
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@retry(wait_fixed=200, stop_max_attempt_number=5)
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def retriable_read_bit(self, registeraddress, functioncode):
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return self.read_bit(registeraddress, functioncode)
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#Address range 0x3000
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def get_id(self):
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"""PV array rated voltage"""
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return self.retriable_read_register(0, 0, 4)
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def get_wind_direction(self):
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"""PV array rated current"""
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return self.retriable_read_register(1, 0, 4)
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def get_wind_speedl(self):
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"""PV array rated power (low 16 bits)"""
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return self.retriable_read_register(2, 2, 4)
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def get_wind_gust(self):
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"""PV array rated power (high 16 bits)"""
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return self.retriable_read_register(3, 2, 4)
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def get_temperature(self):
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"""Rated Battery's voltage"""
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return self.retriable_read_register(4, 2, 4)
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def get_rain(self):
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"""Rated charging current to battery"""
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return self.retriable_read_register(5, 2, 4)
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def get_rain_last24(self):
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"""Rated charging power to battery (low 16 bits)"""
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return self.retriable_read_register(6, 2, 4)
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def get_rain_since_midnight(self):
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"""Charging equipment rated output power (high 16 bits)"""
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return self.retriable_read_register(7, 0, 4)
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def get_humidity(self):
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"""Charging mode: 0x0001 = PWM"""
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return self.retriable_read_register(8, 2, 4)
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def get_pressure(self):
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"""Charging mode: 0x0001 = PWM"""
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return self.retriable_read_register(9, 1, 4)
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