433 lines
13 KiB
Python
Executable file
433 lines
13 KiB
Python
Executable file
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import datetime
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import struct
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import sys
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import time
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from io import RawIOBase
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from typing import Callable, Collection, Optional, cast
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from bluepy import btle
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from libscrc import modbus
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from feasycom_ble import BTLEUart
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MAC = "DC:0D:30:9C:61:BA"
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# write_service = "0000ffd0-0000-1000-8000-00805f9b34fb"
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# read_service = "0000fff0-0000-1000-8000-00805f9b34fb"
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ACTION_READ = 0x03
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ACTION_WRITE = 0x03
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POSSIBLE_MARKER = (0x01, 0xFD, 0xFE, 0xFF)
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# get(255, 12, 2)
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# "ff 03 00 0c 00 02"
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CMD_GET_1 = b"\xff\x03\x00\x0c\x00\x02"
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# > ff 03 04 20 20 20 20
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# get(255, 12, 8)
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# ff 03 00 0c 00 08
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CMD_GET_MODEL = b"\xff\x03\x00\x0c\x00\x08"
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# > ff 03 10 20 20 20 20 4d 4c 32 34 32 30 20 20 20 20 20 20
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# Device SKU: ML2420
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# get(255, 20, 4)
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# ff 03 00 14 00 04
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CMD_GET_VERSION = b"\xff\x03\x00\x14\x00\x04"
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# > ff 03 08 00 04 02 00 02 00 00 03
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# CC ?? 11 22 33 ?? 44 55 66
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# Version: 4.2.0
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# get(255, 24, 3)
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# ff 03 00 18 00 03
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CMD_GET_SERIAL = b"\xff\x03\x00\x18\x00\x03"
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# > ff 03 06 3c 13 02 67 00 01
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# CC 11 22 33 33 ?? ??
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# SN: 60-19-0615
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# get(255, 256, 7)
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# ff 03 01 00 00 07
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CMD_GET_BATTERY_STATE = b"\xff\x03\x01\x00\x00\x07"
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# > ff 03 0e 00 48 00 7e 00 1d 0e 0d 00 7e 00 1c 00 03
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# CC 11 11 22 22 33 33 44 55 66 66 77 77 88 88
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# 1: Battery charge: 72 %
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# 2: Battery voltage: 12.6 V
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# 3: Battery current: 0.29 A
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# 4: Internal temperature?
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# 5: External temperature probe for battery signet 8bit: 13 degC
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# 6: Load voltage: 12.6 V
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# 7: Load current: 0.28 A
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# 8: Load power: 3 W
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# get(255, 263, 4)
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# ff 03 01 07 00 04
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CMD_GET_PANEL_STATUS = b"\xff\x03\x01\x07\x00\x04"
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# > ff 03 08 00 c8 00 14 00 04 00 01
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# CC 11 11 22 22 33 33 ?? ??
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# 1: Panel voltage: 20.0 V
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# 2: Panel current: 0.20 A
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# 3: Panel power: 4 W
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# Charging status?
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# set(255, 266, 1 or 0)
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# ff 06 01 0a 00 01
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CMD_ENABLE_LOAD = b"\xff\x06\x01\x0a\x00\x01"
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CMD_DISABLE_LOAD = b"\xff\x06\x01\x0a\x00\x00"
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REG_LOAD_ENABLE = 0x010A
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# get(255, 267, 21)
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# ff 03 01 0b 00 15
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CMD_GET_LOAD_PARAMETERS = b"\xff\x03\x01\x0b\x00\x15"
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# > ff 03 2a 00 7c 00 7f 00 51 00 20 00 0a 00 03 00 00 00 00 00
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# > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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# > 00 00 00 00 00
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# get(255, 288, 3)
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# ff 03 01 20 00 03
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CMD_GET_2 = b"\xff\x03\x01\x20\x00\x03"
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# > ff 03 06 80 02 00 00 00 00
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# CC 11 22 33 33 33 33
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# 1: boolean flag?: 1
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# 2: ?: 2
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# 3: ?: 0
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# get(255, 57345, 33)
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# ff 03 e0 01 00 21
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CMD_GET_BATTERY_PARAMETERS = b"\xff\x03\xe0\x01\x00\x21"
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# > ff 03 42 07 d0 00 c8 ff 0c 00 02 00 a0 00 9b 00 92 00 90 00
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# > 8a 00 84 00 7e 00 78 00 6f 00 6a 64 32 00 05 00 78 00 78 00
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# > 1e 00 03 00 41 00 a3 00 4b 00 a3 00 00 00 00 00 00 00 00 00
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# > 0f 00 05 00 05 00 04 01 00
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# 33 * uint16
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# get(1, 61440, 10)
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# 01 03 f0 00 00 0a
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CMD_GET_HISTORICAL_TODAY = b"\x01\x03\xf0\x00\x00\x0a"
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CMD_GET_HISTORICAL_YESTERDAY = b"\x01\x03\xf0\x01\x00\x0a"
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CMD_GET_HISTORICAL_D2 = b"\x01\x03\xf0\x02\x00\x0a"
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CMD_GET_HISTORICAL_D3 = b"\x01\x03\xf0\x03\x00\x0a"
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# ,- battery_min_voltage
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# | ,- battery_max_voltage
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# | | ,- ?1 max charge %?
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# | | | ,- ?2
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# | | | | ,- charge_max_power
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# | | | | | ,- discharge_max_power
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# | | | | | | ,- charge_amp_hour
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# | | | | | | | ,- discharge_amp_hour
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# | | | | | | | | ,- production_power
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# | | | | | | | | | ,- consumption_power
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# _|___ _|___ _|___ _|___ _|___ _|___ _|___ _|___ _|___ _|___
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# > 01 03 14 00 7c 00 7f 00 51 00 20 00 0a 00 03 00 00 00 00 00 00 00 00
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# > 01 03 14 00 7c 00 7f 00 53 00 20 00 0a 00 03 00 00 00 00 00 00 00 00
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# battery_min_voltage = 12.4 V
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# battery_max_voltage = 12.7 V
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# ?1 = 83 % ?
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# ?2 =
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# charge_max_power = 10 W
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# discharge_max_power = 3 W
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# charge_amp_hour = 0 Ah
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# discharge_amp_hour = 0 Ah
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# production_power = 0 Wh
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# consumption_power = 0 Wh
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# ff 78 00 00 00 01
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CMD_ = b"\xff\x78\x00\x00\x00\x01"
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# CMD_GET_BATTERY_STATE = b'\xff\x03\x01\x00\x00\x07'
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# > ff 03 0e 00 48 00 7e 00 1d 0e 0d 00 7e 00 1c 00 03
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# CC 11 11 22 22 33 33 44 55 66 66 77 77 88 88
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# 1: Battery charge: 72 %
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# 2: Battery voltage: 12.6 V
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# 3: Battery current: 0.29 A
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# 4: Internal temperature?
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# 5: External temperature probe for battery signed 8bit: 13 degC
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# 6: Load voltage: 12.6 V
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# 7: Load current: 0.28 A
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# 8: Load power: 3 W
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# CMD_GET_PANEL_STATUS = b'\xff\x03\x01\x07\x00\x04'
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# > ff 03 08 00 c8 00 14 00 04 00 01
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# CC 11 11 22 22 33 33 ?? ??
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# > ff 03 08 00 00 00 00 00 00 00 00
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# 1: Panel voltage: 20.0 V
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# 2: Panel current: 0.20 A
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# 3: Panel power: 4 W
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# ?: load_enabled
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# Only factor of 1000
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SI_PREFIXES_LARGE = "kMGTPEZY"
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SI_PREFIXES_SMALL = "mµnpfazy"
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def humanize_number(data, unit: str = ""):
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counter = 0
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while data >= 1000:
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data /= 1000
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counter += 1
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if counter >= len(SI_PREFIXES_LARGE):
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break
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while data < 1:
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data *= 1000
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counter -= 1
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if abs(counter) >= len(SI_PREFIXES_SMALL):
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break
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if not counter:
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prefix = ""
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elif counter > 0:
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prefix = SI_PREFIXES_LARGE[counter - 1]
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elif counter < 0:
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prefix = SI_PREFIXES_SMALL[abs(counter) - 1]
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return f"{data:.3g} {prefix}{unit}"
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class DataItem:
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name: str
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st_format: str
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unit: Optional[str]
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transformation: Optional[Callable]
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def __init__(
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self,
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name: str,
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st_format: str,
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unit: Optional[str] = None,
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transform: Optional[Callable] = None,
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):
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self.name = name
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self.st_format = st_format
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self.unit = unit
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self.transformation = transform
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if self.st_format[0] not in "@=<>!":
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self.st_format = "!" + self.st_format
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@property
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def st_size(self) -> int:
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return struct.calcsize(self.st_format)
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def transform(self, data):
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if self.transformation is None:
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return data
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return self.transformation(data)
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def parse_temperature(bin):
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if bin & 0x80:
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return (bin & 0x7F) * -1
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return bin & 0x7F
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DATA_BATTERY_STATE = [
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DataItem("battery_charge", "H", "%"),
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DataItem("battery_voltage", "H", "V", lambda n: n / 10),
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DataItem("battery_current", "H", "A", lambda n: n / 100),
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DataItem("internal_temperature", "B", "°C", parse_temperature),
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DataItem("battery_temperature", "B", "°C", parse_temperature),
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DataItem("load_voltage", "H", "V", lambda n: n / 10),
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DataItem("load_current", "H", "A", lambda n: n / 100),
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DataItem("load_power", "H", "W"),
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DataItem("panel_voltage", "H", "V", lambda n: n / 10),
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DataItem("panel_current", "H", "A", lambda n: n / 100),
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DataItem("panel_power", "H", "W"),
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DataItem("load_enabled", "x?", transform=bool),
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]
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def parse(data: bytes, items: Collection[DataItem], offset: int = 0) -> dict:
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pos = offset
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res = {}
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for i in items:
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res[i.name] = i.transform(struct.unpack_from(i.st_format, data, offset=pos)[0])
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pos += i.st_size
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return res
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# GET_BATTERY_STATE
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def parse_battery_state(data: bytes) -> dict:
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return parse(data, DATA_BATTERY_STATE)
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HISTORICAL_DATA = [
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DataItem("battery_voltage_min", "H", "V", lambda n: n / 10),
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DataItem("battery_voltage_max", "H", "V", lambda n: n / 10),
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DataItem("charge_max_current", "H", "A", lambda n: n / 100),
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DataItem("_discharge_max_current?", "H", "A", lambda n: n / 100),
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DataItem("charge_max_power", "H", "W"),
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DataItem("discharge_max_power", "H", "W"),
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DataItem("charge_amp_hour", "H", "Ah"),
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DataItem("discharge_amp_hour", "H", "Ah"),
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DataItem("production_power", "H", "Wh"),
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DataItem("consumption_power", "H", "Wh"),
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DataItem("run_days", "H"),
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DataItem("discharge_count", "H"),
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DataItem("full_charge_count", "H"),
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DataItem("total_charge_amp_hours", "L", "Ah"),
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DataItem("total_discharge_amp_hours", "L", "Ah"),
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DataItem("total_production_power", "L", "Wh"),
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DataItem("total_consumption_power", "L", "Wh"),
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]
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def parse_historical_entry(data: bytes) -> dict:
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res = parse(data, HISTORICAL_DATA[:10])
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res_datalen = sum([x.st_size for x in HISTORICAL_DATA[:10]])
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if len(data) > res_datalen:
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res.update(parse(data, HISTORICAL_DATA[10:], offset=res_datalen))
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return res
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def write(fh, data):
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bdata = bytes(data)
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crc = modbus(bdata)
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bcrc = bytes([crc & 0xFF, (crc & 0xFF00) >> 8])
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fh.write(data + bcrc)
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def construct_request(address, words=1, action=ACTION_READ, marker=0xFF):
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assert marker in POSSIBLE_MARKER, f"marker should be one of {POSSIBLE_MARKER}"
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return struct.pack("!BBHH", marker, action, address, words)
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def log(*message: object):
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print(datetime.datetime.utcnow().isoformat(" "), *message)
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sys.stdout.flush()
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def parse_packet(data):
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tag, operation, size = struct.unpack_from("BBB", data)
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_unpacked = struct.unpack_from(f"<{size}BH", data, offset=3)
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crc = _unpacked[-1]
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payload = _unpacked[:-1]
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calculated_crc = modbus(bytes([tag, operation, size, *payload]))
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if crc != calculated_crc:
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e = ValueError(f"CRC missmatch: expected {crc:04X}, got {calculated_crc:04X}.")
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e.tag = tag
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e.operation = operation
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e.size = size
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e.payload = payload
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e.crc = crc
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e.calculated_crc = calculated_crc
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raise e
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return payload
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def readMemory(fh: RawIOBase, address: int, words: int = 1):
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# log(f"Reading {words} words from 0x{address:04X}")
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write(fh, construct_request(address, words=words))
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header = fh.read(3)
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if header and len(header) == 3:
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tag, operation, size = header
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data = fh.read(size)
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_crc = fh.read(2)
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if data and _crc:
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crc = struct.unpack_from("<H", _crc)[0]
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calculated_crc = modbus(bytes([tag, operation, size, *data]))
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if crc == calculated_crc:
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return data
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class Periodical:
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prev: float
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interval: float
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def __init__(self, interval: float, start: Optional[float] = None):
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self.prev = time.time() - interval if start is None else start
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self.interval = interval
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def __call__(self, now: Optional[float] = None) -> bool:
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if now is None:
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now = time.time()
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if (now - self.prev) >= self.interval:
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skipped, overshoot = divmod(now - self.prev, self.interval)
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skipped -= 1
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if skipped:
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log("Skipped:", skipped, overshoot, now - self.prev, self.interval)
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self.prev = now - overshoot
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return True
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return False
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if __name__ == "__main__":
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per_voltages = Periodical(interval=15)
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per_current_hist = Periodical(interval=60)
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while True:
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try:
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log("Connecting...")
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with BTLEUart(MAC, timeout=10) as dev:
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log("Connected.")
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# write(dev, construct_request(0, 32))
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# Memory dump
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# for address in range(0, 0x10000, 16):
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# log(f"Reading 0x{address:04X}...")
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# write(wd, construct_request(address, 16))
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days = 7
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res = readMemory(dev, 0x010B, 21)
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if res:
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d = parse_historical_entry(res)
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log(d)
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days = cast(int, d.get("run_days", 7))
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for i in range(days):
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res = readMemory(dev, 0xF000 + i, 10)
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if res:
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d = parse_historical_entry(res)
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log({i: d})
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while True:
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now = time.time()
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if per_voltages(now):
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# CMD_GET_BATTERY_STATE + CMD_GET_PANEL_STATUS
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res = readMemory(dev, 0x0100, 11)
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if res:
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try:
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d = parse_battery_state(res)
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log(d)
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except struct.error as e:
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log(e)
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log("0x0100 Unpack error:", len(res), res)
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log("Flushed from read buffer; ", dev.read(timeout=0.5))
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if per_current_hist(now):
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res = readMemory(dev, 0x010B, 21)
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if res:
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try:
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d = parse_historical_entry(res)
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log(d)
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except struct.error as e:
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log(e)
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log("0x010B Unpack error:", len(res), res)
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log("Flushed from read buffer; ", dev.read(timeout=0.5))
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# print(".")
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time.sleep(1)
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# if STATUS.get('load_enabled'):
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# write(wd, CMD_DISABLE_LOAD)
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# else:
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# write(wd, CMD_ENABLE_LOAD)
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except btle.BTLEDisconnectError:
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log("ERROR: Disconnected")
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time.sleep(1)
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except KeyboardInterrupt:
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break
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