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InverterData.py
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InverterData.py
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import sys
import socket
import binascii
import re
import libscrc
import json
import paho.mqtt.client as paho
import os
import configparser
import datetime
def twosComplement_hex(hexval):
bits = 16
val = int(hexval, bits)
if val & (1 << (bits-1)):
val -= 1 << bits
return val
# os.chdir(os.path.dirname(sys.argv[0]))
os.chdir(os.getcwd())
# CONFIG
configParser = configparser.RawConfigParser()
configFilePath = r'./config.cfg'
configParser.read(configFilePath)
inverter_ip=configParser.get('DeyeInverter', 'inverter_ip')
inverter_port=int(configParser.get('DeyeInverter', 'inverter_port'))
inverter_sn=int(configParser.get('DeyeInverter', 'inverter_sn'))
installed_power=int(configParser.get('DeyeInverter', 'installed_power'))
mqtt=int(configParser.get('DeyeInverter', 'mqtt'))
mqtt_server=configParser.get('DeyeInverter', 'mqtt_server')
mqtt_port=int(configParser.get('DeyeInverter', 'mqtt_port'))
mqtt_topic=configParser.get('DeyeInverter', 'mqtt_topic')
mqtt_username=configParser.get('DeyeInverter', 'mqtt_username')
mqtt_passwd=configParser.get('DeyeInverter', 'mqtt_passwd')
# END CONFIG
# PREPARE & SEND DATA TO THE INVERTER
output = "{" # initialise json output
pini = 59
pfin = 112
chunks = 0
while chunks < 2:
if chunks == -1: # testing initialisation
pini = 235
pfin = 235
print("Initialise Connection")
start = binascii.unhexlify('A5') # start
length = binascii.unhexlify('1700') # datalength
controlcode = binascii.unhexlify('1045') # controlCode
serial = binascii.unhexlify('0000') # serial
datafield = binascii.unhexlify('020000000000000000000000000000') # com.igen.localmode.dy.instruction.send.SendDataField
pos_ini = str(hex(pini)[2:4].zfill(4))
pos_fin = str(hex(pfin - pini + 1)[2:4].zfill(4))
businessfield = binascii.unhexlify('0103' + pos_ini + pos_fin) # sin CRC16MODBUS
crc = binascii.unhexlify(str(hex(libscrc.modbus(businessfield))[4:6]) + str(hex(libscrc.modbus(businessfield))[2:4])) # CRC16modbus
checksum = binascii.unhexlify('00') # checksum F2
endCode = binascii.unhexlify('15')
inverter_sn2 = bytearray.fromhex(hex(inverter_sn)[8:10] + hex(inverter_sn)[6:8] + hex(inverter_sn)[4:6] + hex(inverter_sn)[2:4])
frame = bytearray(start + length + controlcode + serial + inverter_sn2 + datafield + businessfield + crc + checksum + endCode)
checksum = 0
frame_bytes = bytearray(frame)
for i in range(1, len(frame_bytes) - 2, 1):
checksum += frame_bytes[i] & 255
frame_bytes[len(frame_bytes) - 2] = int((checksum & 255))
# OPEN SOCKET
for res in socket.getaddrinfo(inverter_ip, inverter_port, socket.AF_INET, socket.SOCK_STREAM):
family, socktype, proto, canonname, sockadress = res
try:
clientSocket = socket.socket(family, socktype, proto)
clientSocket.settimeout(10)
clientSocket.connect(sockadress)
except socket.error as msg:
print("Could not open socket")
break
# SEND DATA
# print(chunks)
clientSocket.sendall(frame_bytes)
ok = False
while (not ok):
try:
data = clientSocket.recv(1024)
ok = True
try:
data
except:
print("No data - Die")
sys.exit(1) # die, no data
except socket.timeout as msg:
print("Connection timeout")
sys.exit(1) # die
# PARSE RESPONSE (start position 56, end position 60)
totalpower = 0
i = pfin - pini
a = 0
while a <= i:
p1 = 56 + (a * 4)
p2 = 60 + (a * 4)
response = twosComplement_hex(str(''.join(hex(ord(chr(x)))[2:].zfill(2) for x in bytearray(data)) + ' ' + re.sub('[^\x20-\x7f]', '', ''))[p1:p2])
hexpos = str("0x") + str(hex(a + pini)[2:].zfill(4)).upper()
with open("./DYRealTime.txt") as txtfile:
parameters = json.loads(txtfile.read())
for parameter in parameters:
for item in parameter["items"]:
title = item["titleEN"]
ratio = item["ratio"]
unit = item["unit"]
for register in item["registers"]:
if register == hexpos and chunks != -1:
# print(hexpos+"-"+title+":"+str(response*ratio)+unit)
if title.find("Temperature") != -1:
response = round(response * ratio - 100, 2)
else:
response = round(response * ratio, 2)
# Change battery Soc unit to percentage so python doesnt use the modulus operator
if unit == '%':
unit = 'perc'
# output = output + "\"" + title + "(" + unit + ")" + "\":" + str(response) + ","
output=output+"\""+ title + "_" + unit + "\":" + str(response)+","
if hexpos == '0x00BA':
totalpower += response * ratio
if hexpos == '0x00BB':
totalpower += response * ratio
a += 1
pini = 150
pfin = 195
chunks += 1
output = output[:-1] + "}"
if totalpower < installed_power + 1000:
if mqtt == 1:
# Initialise MQTT if configured
client = paho.Client("inverter")
if mqtt_username != "":
client.tls_set() # <--- even without arguments
client.username_pw_set(username=mqtt_username, password=mqtt_passwd)
client.connect(mqtt_server, mqtt_port)
client.publish(mqtt_topic, totalpower)
client.publish(mqtt_topic + "/attributes", output)
print(f"MQTT Topic:{mqtt_topic}'/attributes' Output:{output}")
print("Ok")
else:
print(output)
else:
# open text file
text_file = open("picos_potencia.txt", "a")
# write string to file
text_file.write(datetime.datetime.now().strftime('%d/%m/%y %I:%M %S %p') + '\n')
text_file.write(output + '\n' + '\n')
# close file
text_file.close()