#!/usr/bin/env python3 import asyncio import socket import binascii import datetime import json import logging _LOGGER = logging.getLogger(__name__) from pprint import pprint class APSystemsInvalidData(Exception): pass class APSystemsECUR: def __init__(self, ipaddr, port=8899, raw_ecu=None, raw_inverter=None): self.ipaddr = ipaddr self.port = port # what do we expect socket data to end in self.recv_suffix = b'END\n' # how long to wait on socket commands until we get our recv_suffix self.timeout = 5 # how many times do we try the same command in a single update before failing self.cmd_attempts = 3 # how big of a buffer to read at a time from the socket self.recv_size = 4096 self.qs1_ids = [ "802", "801" ] self.yc600_ids = [ "406", "407", "408", "409" ] self.yc1000_ids = [ "501", "502", "503", "504" ] self.cmd_suffix = "END\n" self.ecu_query = "APS1100160001" + self.cmd_suffix self.inverter_query_prefix = "APS1100280002" self.inverter_query_suffix = self.cmd_suffix self.inverter_signal_prefix = "APS1100280030" self.inverter_signal_suffix = self.cmd_suffix self.inverter_byte_start = 26 self.ecu_id = None self.qty_of_inverters = 0 self.lifetime_energy = 0 self.current_power = 0 self.today_energy = 0 self.inverters = [] self.firmware = None self.timezone = None self.last_update = None self.ecu_raw_data = raw_ecu self.inverter_raw_data = raw_inverter self.inverter_raw_signal = None self.read_buffer = b'' self.reader = None self.writer = None def dump(self): print(f"ECU : {self.ecu_id}") print(f"Firmware : {self.firmware}") print(f"TZ : {self.timezone}") print(f"Qty of inverters : {self.qty_of_inverters}") async def async_read_from_socket(self): self.read_buffer = b'' end_data = None while end_data != self.recv_suffix: self.read_buffer += await self.reader.read(self.recv_size) size = len(self.read_buffer) end_data = self.read_buffer[size-4:] return self.read_buffer async def async_send_read_from_socket(self, cmd): current_attempt = 0 while current_attempt < self.cmd_attempts: current_attempt += 1 self.writer.write(cmd.encode('utf-8')) await self.writer.drain() try: return await asyncio.wait_for(self.async_read_from_socket(), timeout=self.timeout) except Exception as err: pass self.writer.close() raise APSystemsInvalidData(f"Incomplete data from ECU after {current_attempt} attempts, cmd='{cmd.rstrip()}' data={self.read_buffer}") async def async_query_ecu(self): self.reader, self.writer = await asyncio.open_connection(self.ipaddr, self.port) _LOGGER.info(f"Connected to {self.ipaddr} {self.port}") cmd = self.ecu_query self.ecu_raw_data = await self.async_send_read_from_socket(cmd) self.process_ecu_data() cmd = self.inverter_query_prefix + self.ecu_id + self.inverter_query_suffix self.inverter_raw_data = await self.async_send_read_from_socket(cmd) cmd = self.inverter_signal_prefix + self.ecu_id + self.inverter_signal_suffix self.inverter_raw_signal = await self.async_send_read_from_socket(cmd) self.writer.close() data = self.process_inverter_data() data["ecu_id"] = self.ecu_id data["today_energy"] = self.today_energy data["lifetime_energy"] = self.lifetime_energy data["current_power"] = self.current_power return(data) def query_ecu(self): sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((self.ipaddr,self.port)) sock.sendall(self.ecu_query.encode('utf-8')) self.ecu_raw_data = sock.recv(self.recv_size) self.process_ecu_data() cmd = self.inverter_query_prefix + self.ecu_id + self.inverter_query_suffix sock.sendall(cmd.encode('utf-8')) self.inverter_raw_data = sock.recv(self.recv_size) cmd = self.inverter_signal_prefix + self.ecu_id + self.inverter_signal_suffix sock.sendall(cmd.encode('utf-8')) self.inverter_raw_signal = sock.recv(self.recv_size) sock.shutdown(socket.SHUT_RDWR) sock.close() data = self.process_inverter_data() data["ecu_id"] = self.ecu_id data["today_energy"] = self.today_energy data["lifetime_energy"] = self.lifetime_energy data["current_power"] = self.current_power return(data) def aps_int(self, codec, start): try: return int(binascii.b2a_hex(codec[(start):(start+2)]), 16) except ValueError as err: debugdata = binascii.b2a_hex(codec) raise APSystemsInvalidData(f"Unable to convert binary to int location={start} data={debugdata}") def aps_short(self, codec, start): try: return int(binascii.b2a_hex(codec[(start):(start+1)]), 8) except ValueError as err: debugdata = binascii.b2a_hex(codec) raise APSystemsInvalidData(f"Unable to convert binary to short int location={start} data={debugdata}") def aps_double(self, codec, start): try: return int (binascii.b2a_hex(codec[(start):(start+4)]), 16) except ValueError as err: debugdata = binascii.b2a_hex(codec) raise APSystemsInvalidData(f"Unable to convert binary to double location={start} data={debugdata}") def aps_bool(self, codec, start): return bool(binascii.b2a_hex(codec[(start):(start+2)])) def aps_uid(self, codec, start): return str(binascii.b2a_hex(codec[(start):(start+12)]))[2:14] def aps_str(self, codec, start, amount): return str(codec[start:(start+amount)])[2:(amount+2)] def aps_timestamp(self, codec, start, amount): timestr=str(binascii.b2a_hex(codec[start:(start+amount)]))[2:(amount+2)] return timestr[0:4]+"-"+timestr[4:6]+"-"+timestr[6:8]+" "+timestr[8:10]+":"+timestr[10:12]+":"+timestr[12:14] def check_ecu_checksum(self, data, cmd): datalen = len(data) - 1 try: checksum = int(data[5:9]) except ValueError as err: debugdata = binascii.b2a_hex(data) raise APSystemsInvalidData(f"Error getting checksum int from '{cmd}' data={debugdata}") if datalen != checksum: debugdata = binascii.b2a_hex(data) raise APSystemsInvalidData(f"Checksum on '{cmd}' failed checksum={checksum} datalen={datalen} data={debugdata}") start_str = self.aps_str(data, 0, 3) end_str = self.aps_str(data, len(data) - 4, 3) if start_str != 'APS': debugdata = binascii.b2a_hex(data) raise APSystemsInvalidData(f"Result on '{cmd}' incorrect start signature '{start_str}' != APS data={debugdata}") if end_str != 'END': debugdata = binascii.b2a_hex(data) raise APSystemsInvalidData(f"Result on '{cmd}' incorrect end signature '{end_str}' != END data={debugdata}") return True def process_ecu_data(self, data=None): if not data: data = self.ecu_raw_data self.check_ecu_checksum(data, "ECU Query") self.ecu_id = self.aps_str(data, 13, 12) self.qty_of_inverters = self.aps_int(data, 46) self.firmware = self.aps_str(data, 55, 15) self.timezone = self.aps_str(data, 70, 9) self.lifetime_energy = self.aps_double(data, 27) / 10 self.today_energy = self.aps_double(data, 35) / 100 self.current_power = self.aps_double(data, 31) def process_signal_data(self, data=None): signal_data = {} if not data: data = self.inverter_raw_signal self.check_ecu_checksum(data, "Signal Query") if not self.qty_of_inverters: return signal_data location = 15 for i in range(0, self.qty_of_inverters): uid = self.aps_uid(data, location) location += 6 strength = data[location] location += 1 strength = int((strength / 255) * 100) signal_data[uid] = strength return signal_data def process_inverter_data(self, data=None): if not data: data = self.inverter_raw_data self.check_ecu_checksum(data, "Inverter data") output = {} timestamp = self.aps_timestamp(data, 19, 14) inverter_qty = self.aps_int(data, 17) self.last_update = timestamp output["timestamp"] = timestamp output["inverter_qty"] = inverter_qty output["inverters"] = {} # this is the start of the loop of inverters location = self.inverter_byte_start signal = self.process_signal_data() inverters = {} for i in range(0, inverter_qty): inv={} inverter_uid = self.aps_uid(data, location) inv["uid"] = inverter_uid location += 6 inv["online"] = self.aps_bool(data, location) location += 1 inv["unknown"] = self.aps_str(data, location, 2) location += 2 inv["frequency"] = self.aps_int(data, location) / 10 location += 2 inv["temperature"] = self.aps_int(data, location) - 100 location += 2 inv["signal"] = signal.get(inverter_uid, 0) # the first 3 digits determine the type of inverter inverter_type = inverter_uid[0:3] if inverter_type in self.yc600_ids: (channel_data, location) = self.process_yc600(data, location) inv.update(channel_data) elif inverter_type in self.qs1_ids: (channel_data, location) = self.process_qs1(data, location) inv.update(channel_data) elif inverter_type in self.yc1000_ids: (channel_data, location) = self.process_yc1000(data, location) inv.update(channel_data) else: raise APSystemsInvalidData(f"Unsupported inverter type {inverter_type}") inverters[inverter_uid] = inv output["inverters"] = inverters return (output) def process_yc1000(self, data, location): power = [] voltages = [] power.append(self.aps_int(data, location)) location += 2 voltage = self.aps_int(data, location) location += 2 power.append(self.aps_int(data, location)) location += 2 voltage = self.aps_int(data, location) location += 2 power.append(self.aps_int(data, location)) location += 2 voltage = self.aps_int(data, location) location += 2 power.append(self.aps_int(data, location)) location += 2 voltages.append(voltage) output = { "model" : "YC1000", "channel_qty" : 4, "power" : power, "voltage" : voltages } return (output, location) def process_qs1(self, data, location): power = [] voltages = [] power.append(self.aps_int(data, location)) location += 2 voltage = self.aps_int(data, location) location += 2 power.append(self.aps_int(data, location)) location += 2 power.append(self.aps_int(data, location)) location += 2 power.append(self.aps_int(data, location)) location += 2 voltages.append(voltage) output = { "model" : "QS1", "channel_qty" : 4, "power" : power, "voltage" : voltages } return (output, location) def process_yc600(self, data, location): power = [] voltages = [] for i in range(0, 2): power.append(self.aps_int(data, location)) location += 2 voltages.append(self.aps_int(data, location)) location += 2 output = { "model" : "YC600", "channel_qty" : 2, "power" : power, "voltage" : voltages, } return (output, location)