alfen_eve_modbus_tcp is a python library that collects data from Alfen Eve Car Chargers over Modbus TCP.
To install, either clone this project and install using setuptools:
python3 setup.py install
or install the package from PyPi:
pip3 install alfen-eve-modbus-tcp
The script example.py provides a minimal example of connecting to and displaying all registers from an Alfen Eve Car Charger over Modbus TCP.
usage: example.py [-h] [--timeout TIMEOUT] [--json] host port
positional arguments:
host Modbus TCP address
port Modbus TCP port
optional arguments:
-h, --help show this help message and exit
--timeout TIMEOUT Connection timeout
--json Output as JSONOutput:
Car Charger(192.168.2.136:502: timeout=1, retries=3):
Registers:
Name: DIE_14966
Manufacturer: Alfen NV
Modbus Table Version: 1
Firmware Version: 6.1.0-4159
Station Serial Number: ACE0287582
Date Year: 2023
Date Month: 7
Date day: 15
Time hour: 21
Time minute: 3
Time second: 39
Uptime: 125689398
Time zone: 60
Station Active Maximum Current: 25
Temperature: 35.9375
OCPP state: 1
Nr of sockets: 1
Availability: Operable
Mode 3 state: NotConnected, A
Actual Applied Max Current for Socket: 6.0
Remaining time before fallback to safe current: 0
Meter State: Initialised & Updated
Meter Last Value Timestamp: 334
Meter Type: RTU
Voltage Phase L1N: 238.1899871826172
Voltage Phase L2N: 240.63999938964844
Voltage Phase L3N: 238.4399871826172
Voltage Phase L1L2: nan
Voltage Phase L2L3: nan
Voltage Phase L3L1: nan
Current N: nan
Current Phase L1: 0.0
Current Phase L2: 0.0
Current Phase L3: 0.0
Current Sum: nan
Power Factor Phase L1: nan
Power Factor Phase L2: nan
Power Factor Phase L3: nan
Power Factor Sum: 0.0
Frequency: 50.000003814697266
Real Power Phase L1: nan
Real Power Phase L2: nan
Real Power Phase L3: nan
Real Power Sum: 0.0
Apparent Power Phase L1: nan
Apparent Power Phase L2: nan
Apparent Power Phase L3: nan
Apparent Power Sum: nan
Reactive Power Phase L1: nan
Reactive Power Phase L2: nan
Reactive Power Phase L3: nan
Reactive Power Sum: nan
Real Energy Delivered Phase L1: nan
Real Energy Delivered Phase L2: nan
Real Energy Delivered Phase L3: nan
Real Energy Delivered Sum: 31.0
Real Energy Consumed Phase L1: nan
Real Energy Consumed Phase L2: nan
Real Energy Consumed Phase L3: nan
Real Energy Consumed Sum: nan
Apparent Energy Phase L1: nan
Apparent Energy Phase L2: nan
Apparent Energy Phase L3: nan
Apparent Energy Sum: nan
Reactive Energy Phase L1: nan
Reactive Energy Phase L2: nan
Reactive Energy Phase L3: nan
Reactive Energy Sum: nan
Modbus Slave Max Current: 6.0
Active Load Balancing Safe Current: 6.0
Modbus Slave Received Setpoint Accounted For: Yes
Phases used for charging: 3
SCN Name:
SCN Sockets: 0
SCN Total Consumption Phase L1: 0.0
SCN Total Consumption Phase L2: 0.0
SCN Total Consumption Phase L3: 0.0
SCN Actual Max Current Phase L1: 0.0
SCN Actual Max Current Phase L2: 0.0
SCN Actual Max Current Phase L3: 0.0
SCN Max Current Phase L1: 6.0
SCN Max Current Phase L2: 6.0
SCN Max Current Phase L3: 6.0
Max current valid time L1: 0
Max current valid time L2: 0
Max current valid time L3: 0
SCN safe current: 6.0
SCN Modbus Slave Max Current enable: DisabledPassing --json returns:
{
"c_name": "DIE_14966",
"c_manufacturer": "Alfen NV",
"c_modbus_table_version": 1,
"c_firmware_version": "6.1.0-4159",
"c_platform_type": "NG910",
"c_station_serial_number": "ACE0287582",
"c_date_year": 2023,
"c_date_month": 7,
"c_date_day": 15,
"c_time_hour": 21,
"c_time_minute": 10,
"c_time_second": 48,
"c_uptime": 126118547,
"c_time_zone": 60,
"station_active_max_current": 25,
"temperature": 35.8125,
"ocpp_state": 1,
"nr_of_sockets": 1,
"meter_state": 3,
"meter_last_value_timestamp": 29,
"meter_type": 0,
"voltage_phase_L1N": 237.8199920654297,
"voltage_phase_L2N": 240.75999450683594,
"voltage_phase_L3N": 238.80999755859375,
"voltage_phase_L1L2": NaN,
"voltage_phase_L2L3": NaN,
"voltage_phase_L3L1": NaN,
"current_N": NaN,
"current_phase_L1": 0.0,
"current_phase_L2": 0.0,
"current_phase_L3": 0.0,
"current_sum": NaN,
"power_factor_phase_L1": NaN,
"power_factor_phase_L2": NaN,
"power_factor_phase_L3": NaN,
"power_factor_sum": 0.0,
"frequency": 50.02000427246094,
"real_power_phase_L1": NaN,
"real_power_phase_L2": NaN,
"real_power_phase_L3": NaN,
"real_power_sum": 0.0,
"apparent_power_phase_L1": NaN,
"apparent_power_phase_L2": NaN,
"apparent_power_phase_L3": NaN,
"apparent_power_sum": NaN,
"reactive_power_phase_L1": NaN,
"reactive_power_phase_L2": NaN,
"reactive_power_phase_L3": NaN,
"reactive_power_sum": NaN,
"real_energy_delivered_phase_L1": NaN,
"real_energy_delivered_phase_L2": NaN,
"real_energy_delivered_phase_L3": NaN,
"real_energy_delivered_sum": 31.0,
"real_energy_consumed_phase_L1": NaN,
"real_energy_consumed_phase_L2": NaN,
"real_energy_consumed_phase_L3": NaN,
"real_energy_consumed_sum": NaN,
"apparent_energy_phase_L1": NaN,
"apparent_energy_phase_L2": NaN,
"apparent_energy_phase_L3": NaN,
"apparent_energy_sum": NaN,
"reactive_energy_phase_L1": NaN,
"reactive_energy_phase_L2": NaN,
"reactive_energy_phase_L3": NaN,
"reactive_energy_sum": NaN,
"availability": 1,
"mode_3_state": "A",
"actual_applied_max_current": 6.0,
"modbus_slave_max_current_valid_time": 0,
"modbus_slave_max_current": 6.0,
"active_load_balancing_safe_current": 6.0,
"modbus_slave_received_setpoint_accounted_for": 1,
"charge_using_1_or_3_phases": 3,
"scn_name": "",
"scn_sockets": 0,
"scn_total_consumption_phase_l1": 0.0,
"scn_total_consumption_phase_l2": 0.0,
"scn_total_consumption_phase_l3": 0.0,
"scn_actual_max_current_phase_l1": 0.0,
"scn_actual_max_current_phase_l2": 0.0,
"scn_actual_max_current_phase_l3": 0.0,
"scn_max_current_phase_l1": 6.0,
"scn_max_current_phase_l2": 6.0,
"scn_max_current_phase_l3": 6.0,
"remaining_valid_time_max_current_phase_l1": 0,
"remaining_valid_time_max_current_phase_l2": 0,
"remaining_valid_time_max_current_phase_l3": 0,
"scn_safe_current": 6.0,
"scn_modbus_slave_max_current_enable": 0
}If you wish to use Modbus TCP the following parameters are relevant:
host = IP or DNS name of your Modbus TCP device, required
port = TCP port of the Modbus TCP device, required
Connecting to the car charger:
>>> import alfen_eve_modbus_tcp
# Car Charger over Modbus TCP
>>> car_charger = alfen_eve_modbus_tcp.CarCharger(host="192.168.2.136", port=502)Test the connection, remember that only a single connection at a time is allowed:
>>> car_charger.connect()
True
>>> car_charger.connected()
TrueWhile it is not necessary to explicitly call connect() before reading registers, you should do so before calling connected(). The connection can be closed by calling disconnect().
Printing the class yields basic device parameters:
>>> car_charger
Car Charger(192.168.2.136:502: timeout=1, retries=3)Reading a single input register by name:
>>> car_charger.read("c_manufacturer")
{'c_manufacturer': 'Alfen NV'}Read all input registers using read_all():
>>> car_charger.read_all()
{
'c_name': 'DIE_14966',
'c_manufacturer': 'Alfen NV',
'c_modbus_table_version': 1,
'c_firmware_version': '6.1.0-4159',
'c_platform_type': 'NG910',
'c_station_serial_number': 'ACE0287582',
'c_date_year': 2023,
'c_date_month': 7,
'c_date_day': 15,
'c_time_hour': 21,
'c_time_minute': 23,
'c_time_second': 45,
'c_uptime': 126895863,
'c_time_zone': 60,
'station_active_max_current': 25,
'temperature': 35.75,
'ocpp_state': 1,
'nr_of_sockets': 1,
'meter_state': 3,
'meter_last_value_timestamp': 602,
'meter_type': 0,
'voltage_phase_L1N': 239.1999969482422,
'voltage_phase_L2N': 241.25,
'voltage_phase_L3N': 238.6599884033203,
'voltage_phase_L1L2': nan,
'voltage_phase_L2L3': nan,
'voltage_phase_L3L1': nan,
'current_N': nan,
'current_phase_L1': 0.0,
'current_phase_L2': 0.0,
'current_phase_L3': 0.0,
'current_sum': nan,
'power_factor_phase_L1': nan,
'power_factor_phase_L2': nan,
'power_factor_phase_L3': nan,
'power_factor_sum': 0.0,
'frequency': 50.060001373291016,
'real_power_phase_L1': nan,
'real_power_phase_L2': nan,
'real_power_phase_L3': nan,
'real_power_sum': 0.0,
'apparent_power_phase_L1': nan,
'apparent_power_phase_L2': nan,
'apparent_power_phase_L3': nan,
'apparent_power_sum': nan,
'reactive_power_phase_L1': nan,
'reactive_power_phase_L2': nan,
'reactive_power_phase_L3': nan,
'reactive_power_sum': nan,
'real_energy_delivered_phase_L1': nan,
'real_energy_delivered_phase_L2': nan,
'real_energy_delivered_phase_L3': nan,
'real_energy_delivered_sum': 31.0,
'real_energy_consumed_phase_L1': nan,
'real_energy_consumed_phase_L2': nan,
'real_energy_consumed_phase_L3': nan,
'real_energy_consumed_sum': nan,
'apparent_energy_phase_L1': nan,
'apparent_energy_phase_L2': nan,
'apparent_energy_phase_L3': nan,
'apparent_energy_sum': nan,
'reactive_energy_phase_L1': nan,
'reactive_energy_phase_L2': nan,
'reactive_energy_phase_L3': nan,
'reactive_energy_sum': nan,
'availability': 1,
'mode_3_state': 'A',
'actual_applied_max_current': 6.0,
'modbus_slave_max_current_valid_time': 0,
'modbus_slave_max_current': 6.0,
'active_load_balancing_safe_current': 6.0,
'modbus_slave_received_setpoint_accounted_for': 1,
'charge_using_1_or_3_phases': 3,
'scn_name': '',
'scn_sockets': 0,
'scn_total_consumption_phase_l1': 0.0,
'scn_total_consumption_phase_l2': 0.0,
'scn_total_consumption_phase_l3': 0.0,
'scn_actual_max_current_phase_l1': 0.0,
'scn_actual_max_current_phase_l2': 0.0,
'scn_actual_max_current_phase_l3': 0.0,
'scn_max_current_phase_l1': 6.0,
'scn_max_current_phase_l2': 6.0,
'scn_max_current_phase_l3': 6.0,
'remaining_valid_time_max_current_phase_l1': 0,
'remaining_valid_time_max_current_phase_l2': 0,
'remaining_valid_time_max_current_phase_l3': 0,
'scn_safe_current': 6.0,
'scn_modbus_slave_max_current_enable': 0
}If you need more information about a particular register, to look up the units or enumerations, for example:
>>> car_charger.registers["modbus_slave_max_current"]
# unit, address, length, type, datatype, valuetype, name, unit, batching
(
1,
1210,
2,
<registerType.HOLDING: 2>,
<registerDataType.FLOAT32: 6>,
<class 'float'>,
'Modbus Slave Max Current',
'A',
7
)Contributions are more than welcome.