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@smashnet
Last active December 19, 2023 12:31
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Library to get a lot of useful data out of Senec appliances.
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Library to get a lot of useful data out of Senec appliances.
Tested with: SENEC.Home V3 hybrid duo
Kudos:
* SYSTEM_STATE_NAME taken from https://github.com/mchwalisz/pysenec
"""
import requests
import struct
import logging
import json
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
__author__ = "Nicolas Inden"
__copyright__ = "Copyright 2023, Nicolas Inden"
__credits__ = ["Nicolas Inden", "Mikołaj Chwalisz"]
__license__ = "Apache-2.0 License"
__version__ = "1.0.4"
__maintainer__ = "Nicolas Inden"
__email__ = "nico@smashnet.de"
__status__ = "Production"
logging.basicConfig(format='%(asctime)s %(levelname)s:%(message)s',level=logging.INFO)
log = logging.getLogger("Senec")
class Senec():
def __init__(self, device_ip):
self.device_ip = device_ip
self.read_api = f"https://{device_ip}/lala.cgi"
def get_values(self, request_json = {}):
if not request_json: request_json = BASIC_REQUEST
try:
response = requests.post(self.read_api, json=request_json, verify=False)
if response.status_code == 200:
return self.__decode_data(response.json())
#return self.__substitute_system_state(res)
else:
log.warning(f"Status code {response.status_code}")
return {"error": f"Status code {response.status_code}"}
except requests.Timeout:
errmsg = f"{self.device_ip}: Timeout while accessing Senec box."
log.warning(errmsg)
return {"error": errmsg}
except requests.ConnectionError:
errmsg = f"{self.device_ip}: Connection error while accessing Senec box."
log.warning(errmsg)
return {"error": errmsg}
except requests.exceptions.JSONDecodeError as e:
errmsg = f"{self.device_ip}: Could not decode JSON response: {e}"
log.warning(errmsg)
return {"error": errmsg}
except Exception as e:
errmsg = f"{self.device_ip}: Other exception: {e}"
log.warning(errmsg)
return {"error": errmsg}
def get_all_values(self):
request_json = {"STATISTIC": {},"ENERGY": {},"FEATURES": {},"LOG": {},"SYS_UPDATE": {},"WIZARD": {},"BMS": {},"BAT1": {},"BAT1OBJ1": {},"BAT1OBJ2": {},"BAT1OBJ3": {},"BAT1OBJ4": {},"PWR_UNIT": {},"PV1": {},"FACTORY": {},"GRIDCONFIG": {}}
return self.get_values(request_json)
def __decode_data(self, data):
return { k: self.__decode_data_helper(v) for k, v in data.items() }
def __decode_data_helper(self, data):
if isinstance(data, str):
return self.__decode_value(data)
if isinstance(data, list):
return [self.__decode_value(val) for val in data]
if isinstance(data, dict):
return { k: self.__decode_data_helper(v) for k, v in data.items() }
def __decode_value(self, value):
if value.startswith("fl_"):
return struct.unpack('!f', bytes.fromhex(value[3:]))[0]
if value.startswith("u8_"):
return struct.unpack('!B', bytes.fromhex(value[3:]))[0]
if value.startswith("i3_") or value.startswith("i8_") or value.startswith("u3_") or value.startswith("u1_"):
return int(value[3:], 16)
if value.startswith("st_"):
return value[3:]
return value
def __substitute_system_state(self, data):
#currently unused
system_state = data['STATISTIC']['CURRENT_STATE']
if system_state == "VARIABLE_NOT_FOUND":
return data
try:
data['STATISTIC']['CURRENT_STATE'] = SYSTEM_STATE_NAME[system_state]
except KeyError as e:
log.error(f"Failed substituting system state: {e}")
data['STATISTIC']['CURRENT_STATE'] = f"unknown ({system_state})"
finally:
return data
BASIC_REQUEST = {
#'STATISTIC': {
# 'CURRENT_STATE': '', # Current state of the system (int, see SYSTEM_STATE_NAME)
# 'LIVE_BAT_CHARGE_MASTER': '', # Battery charge amount since installation (kWh)
# 'LIVE_BAT_DISCHARGE_MASTER': '', # Battery discharge amount since installation (kWh)
# 'LIVE_GRID_EXPORT': '', # Grid export amount since installation (kWh)
# 'LIVE_GRID_IMPORT': '', # Grid import amount since installation (kWh)
# 'LIVE_HOUSE_CONS': '', # House consumption since installation (kWh)
# 'LIVE_PV_GEN': '', # PV generated power since installation (kWh)
# 'MEASURE_TIME': '' # Unix timestamp for above values (ms)
#},
'ENERGY': {
'GUI_BAT_DATA_CURRENT': '', # Battery charge current: negative if discharging, positiv if charging (A)
'GUI_BAT_DATA_FUEL_CHARGE': '', # Remaining battery (percent)
'GUI_BAT_DATA_POWER': '', # Battery charge power: negative if discharging, positiv if charging (W)
'GUI_BAT_DATA_VOLTAGE': '', # Battery voltage (V)
'GUI_GRID_POW': '', # Grid power: negative if exporting, positiv if importing (W)
'GUI_HOUSE_POW': '', # House power consumption (W)
'GUI_INVERTER_POWER': '', # PV production (W)
'STAT_HOURS_OF_OPERATION': '' # Appliance hours of operation
},
'BMS': {
'CHARGED_ENERGY': '', # List: Charged energy per battery
'DISCHARGED_ENERGY': '', # List: Discharged energy per battery
'CYCLES': '' # List: Cycles per battery
},
'PV1': {
'MPP_CUR': '', # List: MPP current (A)
'MPP_POWER': '', # List: MPP power (W)
'MPP_VOL': '', # List: MPP voltage (V)
'POWER_RATIO': '', # Grid export limit (percent)
'P_TOTAL': '' # ?
},
'FACTORY': {
'DESIGN_CAPACITY': '', # Battery design capacity (Wh)
'MAX_CHARGE_POWER_DC': '', # Battery max charging power (W)
'MAX_DISCHARGE_POWER_DC': '' # Battery max discharging power (W)
}
}
SYSTEM_STATE_NAME = {
0: "INITIAL STATE",
1: "ERROR INVERTER COMMUNICATION",
2: "ERROR ELECTRICY METER",
3: "RIPPLE CONTROL RECEIVER",
4: "INITIAL CHARGE",
5: "MAINTENANCE CHARGE",
6: "MAINTENANCE READY",
7: "MAINTENANCE REQUIRED",
8: "MAN. SAFETY CHARGE",
9: "SAFETY CHARGE READY",
10: "FULL CHARGE",
11: "EQUALIZATION: CHARGE",
12: "DESULFATATION: CHARGE",
13: "BATTERY FULL",
14: "CHARGE",
15: "BATTERY EMPTY",
16: "DISCHARGE",
17: "PV + DISCHARGE",
18: "GRID + DISCHARGE",
19: "PASSIVE",
20: "OFF",
21: "OWN CONSUMPTION",
22: "RESTART",
23: "MAN. EQUALIZATION: CHARGE",
24: "MAN. DESULFATATION: CHARGE",
25: "SAFETY CHARGE",
26: "BATTERY PROTECTION MODE",
27: "EG ERROR",
28: "EG CHARGE",
29: "EG DISCHARGE",
30: "EG PASSIVE",
31: "EG PROHIBIT CHARGE",
32: "EG PROHIBIT DISCHARGE",
33: "EMERGANCY CHARGE",
34: "SOFTWARE UPDATE",
35: "NSP ERROR",
36: "NSP ERROR: GRID",
37: "NSP ERROR: HARDWRE",
38: "NO SERVER CONNECTION",
39: "BMS ERROR",
40: "MAINTENANCE: FILTER",
41: "SLEEPING MODE",
42: "WAITING EXCESS",
43: "CAPACITY TEST: CHARGE",
44: "CAPACITY TEST: DISCHARGE",
45: "MAN. DESULFATATION: WAIT",
46: "MAN. DESULFATATION: READY",
47: "MAN. DESULFATATION: ERROR",
48: "EQUALIZATION: WAIT",
49: "EMERGANCY CHARGE: ERROR",
50: "MAN. EQUALIZATION: WAIT",
51: "MAN. EQUALIZATION: ERROR",
52: "MAN: EQUALIZATION: READY",
53: "AUTO. DESULFATATION: WAIT",
54: "ABSORPTION PHASE",
55: "DC-SWITCH OFF",
56: "PEAK-SHAVING: WAIT",
57: "ERROR BATTERY INVERTER",
58: "NPU-ERROR",
59: "BMS OFFLINE",
60: "MAINTENANCE CHARGE ERROR",
61: "MAN. SAFETY CHARGE ERROR",
62: "SAFETY CHARGE ERROR",
63: "NO CONNECTION TO MASTER",
64: "LITHIUM SAFE MODE ACTIVE",
65: "LITHIUM SAFE MODE DONE",
66: "BATTERY VOLTAGE ERROR",
67: "BMS DC SWITCHED OFF",
68: "GRID INITIALIZATION",
69: "GRID STABILIZATION",
70: "REMOTE SHUTDOWN",
71: "OFFPEAK-CHARGE",
72: "ERROR HALFBRIDGE",
73: "BMS: ERROR OPERATING TEMPERATURE",
74: "FACOTRY SETTINGS NOT FOUND",
75: "BACKUP POWER MODE - ACTIVE",
76: "BACKUP POWER MODE - BATTERY EMPTY",
77: "BACKUP POWER MODE ERROR",
78: "INITIALISING",
79: "INSTALLATION MODE",
80: "GRID OFFLINE",
81: "BMS UPDATE NEEDED",
82: "BMS CONFIGURATION NEEDED",
83: "INSULATION TEST",
84: "SELFTEST",
85: "EXTERNAL CONTROL",
86: "ERROR: TEMPERATURESENSOR",
87: "GRID OPERATOR: CHARGE PROHIBITED",
88: "GRID OPERATOR: DISCHARGE PROHIBITED",
89: "SPARE CAPACITY",
90: "SELFTEST ERROR",
91: "EARTH FAULT",
92: "PV-MODE",
93: "REMOTE DISCONNECTION",
94: "ERROR DRM0",
95: "BATTERY DIAGNOSIS"
}
if __name__ == "__main__":
api = Senec("IP_OF_YOUR_SENEC_APPLIANCE")
print(api.get_values())
@Hobbyflyer
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@smashnet
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Author

Hi, i used your code here https://github.com/Hobbyflyer/senec_monitoring?fbclid=IwAR0M8O4uSQU_D8rc3BlnNGvXKUCEnsg35lNrw3gdwCu6ia0L5uuLQLbgMEM
Hope it ok...

Yes of course :)

Hope it works well for you!

@jolerche
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jolerche commented Feb 3, 2023

Hi Nicolas,
Thanks a lot for your work. I have a question though:
Is it intended to create JSON output? If so, JSON Lint at https://jsonlint.com/ qualified output as "invalid" as according to JSON syntax (https://www.json.org/json-en.html) keys must be enclosed in double instead of single quotes.

Importing json at the beginning

import json

and replacing the end of script

if __name__ == "__main__":
    api = Senec("THE_IP_ADDRESS")
    s = json.dumps( api.get_values() )
    print (s)

created valid JSON according to above linter. If desired, your code certainly might offer better ways of mentioned transformation.

What do you think?

Greetings,
Jörg

@smashnet
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Hi Jörg,

sorry for the late answer.

The __main__ part of the file is just for demonstration purposes. I assume this file to be used within other projects where you would just instantiate Senec and use get_values() to further process the data. In such a case a Python dict is the right thing to return.

Greetings,
Nico

@jolerche
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Hi Nico,

thanks for your feedback - I totally agree!

Greetings,
Jörg

@changyang1230
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Used your code for smart charger integration script. Thanks for the useful library! (New to Python, literally just coded everything with the help of ChatGPT over the last day :P)

@phorbi
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phorbi commented Aug 18, 2023

With the latest update (REVISION MCU: 3825; REVISION MCU-BL: 2307; REVISION NPU-REGS: 10; REVISION NPU-IMAGE: 2307; REVISION GUI: 2966) a few things seem to have happened:

  1. the access to http was switched off, only https works --> line 33 should be changed to:
    self.read_api = f"https://{device_ip}/lala.cgi"
  2. the ssl certificate is not verifiable --> I hope SENEC fixes this. for now as a work around line 38 can be changed to:
    response = requests.post(self.read_api, json=request_json, verify=False)
  3. I noticed that all "'STATISTIC': " Objects are no longer available

@changyang1230
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Hi, it appears that some other projects that read SENEC's data has managed to find a workaround for the changes in SENEC's firmware that now mandates https.

Example here: https://github.com/evcc-io/evcc/blob/8351a4471f74d8811e4bdb02e75c5a7b6d0ff8bb/templates/definition/meter/senec-home.yaml#L2

Would be wonderful if this amazing library can be updated to incorporate this fix too.

@smashnet
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Thx @phorbi and @changyang1230

Did a little patch release to make this work again. Now uses HTTPS to connect to Senec appliance and ignores STATISTICS values.

@changyang1230
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Thank you so so much!

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