Refactor
This commit is contained in:
parent
59fc5e4fa9
commit
82ee08a1d7
9 changed files with 374 additions and 374 deletions
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@ -4,7 +4,7 @@ from typing import Iterable, List
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from table_drawing import table
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from srnemqtt import parse_packet
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from srnemqtt.protocol import parse_packet
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def memory_table(
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@ -1,6 +1,7 @@
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# -*- coding: utf-8 -*-
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from srnemqtt import MAC, construct_request, write
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from srnemqtt.feasycom_ble import BTLEUart
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from srnemqtt.constants import MAC
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from srnemqtt.lib.feasycom_ble import BTLEUart
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from srnemqtt.protocol import construct_request, write
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with BTLEUart(MAC, timeout=1) as x:
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362
srnemqtt/__init__.py
Executable file → Normal file
362
srnemqtt/__init__.py
Executable file → Normal file
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@ -1,362 +0,0 @@
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#!/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
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from libscrc import modbus
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from .feasycom_ble import BTLEUart
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from .solar_types import DATA_BATTERY_STATE, HISTORICAL_DATA, DataItem
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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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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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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, **kwargs):
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print(datetime.datetime.utcnow().isoformat(" "), *message, **kwargs)
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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 discardUntil(fh: RawIOBase, byte: int, timeout=10) -> Optional[int]:
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assert byte >= 0 and byte < 256, f"byte: Expected 8bit unsigned int, got {byte}"
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def expand(b: Optional[bytes]):
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if b is None:
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return b
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return b[0]
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start = time.time()
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discarded = 0
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read_byte = expand(fh.read(1))
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while read_byte != byte:
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if read_byte is not None:
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if not discarded:
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log("Discarding", end="")
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discarded += 1
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print(f" {read_byte:02X}", end="")
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sys.stdout.flush()
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if time.time() - start > timeout:
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read_byte = None
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break
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read_byte = expand(fh.read(1))
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if discarded:
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print()
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sys.stdout.flush()
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return read_byte
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def readMemory(fh: RawIOBase, address: int, words: int = 1) -> Optional[bytes]:
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# log(f"Reading {words} words from 0x{address:04X}")
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request = construct_request(address, words=words)
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# log("Request:", request)
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write(fh, request)
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tag = discardUntil(fh, 0xFF)
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if tag is None:
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return None
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header = fh.read(2)
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if header and len(header) == 2:
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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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try:
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crc = struct.unpack_from("<H", _crc)[0]
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except struct.error:
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log(f"readMemory: CRC error; read {len(_crc)} bytes (2 expected)")
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return None
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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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else:
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log(f"readMemory: CRC error; {crc:04X} != {calculated_crc:04X}")
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log("data or crc is falsely", header, data, _crc)
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return None
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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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def try_read_parse(
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dev: BTLEUart,
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address: int,
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words: int = 1,
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parser: Optional[Callable] = None,
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attempts=5,
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) -> Optional[dict]:
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while attempts:
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attempts -= 1
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res = readMemory(dev, address, words)
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if res:
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try:
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if parser:
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return parser(res)
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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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else:
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log(f"No data read, expected {words*2} bytes (attempts left: {attempts})")
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return None
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@ -7,17 +7,12 @@ from typing import cast
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from bluepy import btle
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from . import (
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MAC,
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Periodical,
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log,
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parse_battery_state,
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parse_historical_entry,
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try_read_parse,
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)
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from .config import get_config, get_consumers
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from .feasycom_ble import BTLEUart
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from .constants import MAC
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from .lib.feasycom_ble import BTLEUart
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from .protocol import parse_battery_state, parse_historical_entry, try_read_parse
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from .solar_types import DataName
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from .util import Periodical, log
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def main():
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145
srnemqtt/constants.py
Normal file
145
srnemqtt/constants.py
Normal file
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@ -0,0 +1,145 @@
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# -*- coding: utf-8 -*-
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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
|
||||
# 4: Internal temperature?
|
||||
# 5: External temperature probe for battery signet 8bit: 13 degC
|
||||
# 6: Load voltage: 12.6 V
|
||||
# 7: Load current: 0.28 A
|
||||
# 8: Load power: 3 W
|
||||
|
||||
# get(255, 263, 4)
|
||||
# ff 03 01 07 00 04
|
||||
CMD_GET_PANEL_STATUS = b"\xff\x03\x01\x07\x00\x04"
|
||||
# > ff 03 08 00 c8 00 14 00 04 00 01
|
||||
# CC 11 11 22 22 33 33 ?? ??
|
||||
# 1: Panel voltage: 20.0 V
|
||||
# 2: Panel current: 0.20 A
|
||||
# 3: Panel power: 4 W
|
||||
# Charging status?
|
||||
|
||||
# set(255, 266, 1 or 0)
|
||||
# ff 06 01 0a 00 01
|
||||
CMD_ENABLE_LOAD = b"\xff\x06\x01\x0a\x00\x01"
|
||||
CMD_DISABLE_LOAD = b"\xff\x06\x01\x0a\x00\x00"
|
||||
REG_LOAD_ENABLE = 0x010A
|
||||
|
||||
# get(255, 267, 21)
|
||||
# ff 03 01 0b 00 15
|
||||
CMD_GET_LOAD_PARAMETERS = b"\xff\x03\x01\x0b\x00\x15"
|
||||
# > ff 03 2a 00 7c 00 7f 00 51 00 20 00 0a 00 03 00 00 00 00 00
|
||||
# > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
||||
# > 00 00 00 00 00
|
||||
|
||||
# get(255, 288, 3)
|
||||
# ff 03 01 20 00 03
|
||||
CMD_GET_2 = b"\xff\x03\x01\x20\x00\x03"
|
||||
# > ff 03 06 80 02 00 00 00 00
|
||||
# CC 11 22 33 33 33 33
|
||||
# 1: boolean flag?: 1
|
||||
# 2: ?: 2
|
||||
# 3: ?: 0
|
||||
|
||||
# get(255, 57345, 33)
|
||||
# ff 03 e0 01 00 21
|
||||
CMD_GET_BATTERY_PARAMETERS = b"\xff\x03\xe0\x01\x00\x21"
|
||||
# > ff 03 42 07 d0 00 c8 ff 0c 00 02 00 a0 00 9b 00 92 00 90 00
|
||||
# > 8a 00 84 00 7e 00 78 00 6f 00 6a 64 32 00 05 00 78 00 78 00
|
||||
# > 1e 00 03 00 41 00 a3 00 4b 00 a3 00 00 00 00 00 00 00 00 00
|
||||
# > 0f 00 05 00 05 00 04 01 00
|
||||
# 33 * uint16
|
||||
|
||||
# get(1, 61440, 10)
|
||||
# 01 03 f0 00 00 0a
|
||||
CMD_GET_HISTORICAL_TODAY = b"\x01\x03\xf0\x00\x00\x0a"
|
||||
CMD_GET_HISTORICAL_YESTERDAY = b"\x01\x03\xf0\x01\x00\x0a"
|
||||
CMD_GET_HISTORICAL_D2 = b"\x01\x03\xf0\x02\x00\x0a"
|
||||
CMD_GET_HISTORICAL_D3 = b"\x01\x03\xf0\x03\x00\x0a"
|
||||
|
||||
# ,- battery_min_voltage
|
||||
# | ,- battery_max_voltage
|
||||
# | | ,- ?1 max charge %?
|
||||
# | | | ,- ?2
|
||||
# | | | | ,- charge_max_power
|
||||
# | | | | | ,- discharge_max_power
|
||||
# | | | | | | ,- charge_amp_hour
|
||||
# | | | | | | | ,- discharge_amp_hour
|
||||
# | | | | | | | | ,- production_power
|
||||
# | | | | | | | | | ,- consumption_power
|
||||
# _|___ _|___ _|___ _|___ _|___ _|___ _|___ _|___ _|___ _|___
|
||||
# > 01 03 14 00 7c 00 7f 00 51 00 20 00 0a 00 03 00 00 00 00 00 00 00 00
|
||||
# > 01 03 14 00 7c 00 7f 00 53 00 20 00 0a 00 03 00 00 00 00 00 00 00 00
|
||||
# battery_min_voltage = 12.4 V
|
||||
# battery_max_voltage = 12.7 V
|
||||
# ?1 = 83 % ?
|
||||
# ?2 =
|
||||
# charge_max_power = 10 W
|
||||
# discharge_max_power = 3 W
|
||||
# charge_amp_hour = 0 Ah
|
||||
# discharge_amp_hour = 0 Ah
|
||||
# production_power = 0 Wh
|
||||
# consumption_power = 0 Wh
|
||||
|
||||
# ff 78 00 00 00 01
|
||||
CMD_ = b"\xff\x78\x00\x00\x00\x01"
|
||||
|
||||
# CMD_GET_BATTERY_STATE = b'\xff\x03\x01\x00\x00\x07'
|
||||
# > ff 03 0e 00 48 00 7e 00 1d 0e 0d 00 7e 00 1c 00 03
|
||||
# CC 11 11 22 22 33 33 44 55 66 66 77 77 88 88
|
||||
# 1: Battery charge: 72 %
|
||||
# 2: Battery voltage: 12.6 V
|
||||
# 3: Battery current: 0.29 A
|
||||
# 4: Internal temperature?
|
||||
# 5: External temperature probe for battery signed 8bit: 13 degC
|
||||
# 6: Load voltage: 12.6 V
|
||||
# 7: Load current: 0.28 A
|
||||
# 8: Load power: 3 W
|
||||
|
||||
# CMD_GET_PANEL_STATUS = b'\xff\x03\x01\x07\x00\x04'
|
||||
# > ff 03 08 00 c8 00 14 00 04 00 01
|
||||
# CC 11 11 22 22 33 33 ?? ??
|
||||
# > ff 03 08 00 00 00 00 00 00 00 00
|
||||
# 1: Panel voltage: 20.0 V
|
||||
# 2: Panel current: 0.20 A
|
||||
# 3: Panel power: 4 W
|
||||
# ?: load_enabled
|
||||
0
srnemqtt/lib/__init__.py
Normal file
0
srnemqtt/lib/__init__.py
Normal file
158
srnemqtt/protocol.py
Normal file
158
srnemqtt/protocol.py
Normal file
|
|
@ -0,0 +1,158 @@
|
|||
# -*- coding: utf-8 -*-
|
||||
import struct
|
||||
import sys
|
||||
import time
|
||||
from io import RawIOBase
|
||||
from typing import Callable, Collection, Optional
|
||||
|
||||
from libscrc import modbus
|
||||
|
||||
from .constants import ACTION_READ, POSSIBLE_MARKER
|
||||
from .lib.feasycom_ble import BTLEUart
|
||||
from .solar_types import DATA_BATTERY_STATE, HISTORICAL_DATA, DataItem
|
||||
from .util import log
|
||||
|
||||
|
||||
def write(fh, data):
|
||||
bdata = bytes(data)
|
||||
crc = modbus(bdata)
|
||||
bcrc = bytes([crc & 0xFF, (crc & 0xFF00) >> 8])
|
||||
fh.write(data + bcrc)
|
||||
|
||||
|
||||
def construct_request(address, words=1, action=ACTION_READ, marker=0xFF):
|
||||
assert marker in POSSIBLE_MARKER, f"marker should be one of {POSSIBLE_MARKER}"
|
||||
return struct.pack("!BBHH", marker, action, address, words)
|
||||
|
||||
|
||||
def parse(data: bytes, items: Collection[DataItem], offset: int = 0) -> dict:
|
||||
pos = offset
|
||||
res = {}
|
||||
|
||||
for i in items:
|
||||
res[i.name] = i.transform(struct.unpack_from(i.st_format, data, offset=pos)[0])
|
||||
pos += i.st_size
|
||||
|
||||
return res
|
||||
|
||||
|
||||
# GET_BATTERY_STATE
|
||||
def parse_battery_state(data: bytes) -> dict:
|
||||
return parse(data, DATA_BATTERY_STATE)
|
||||
|
||||
|
||||
def parse_historical_entry(data: bytes) -> dict:
|
||||
res = parse(data, HISTORICAL_DATA[:10])
|
||||
|
||||
res_datalen = sum([x.st_size for x in HISTORICAL_DATA[:10]])
|
||||
|
||||
if len(data) > res_datalen:
|
||||
res.update(parse(data, HISTORICAL_DATA[10:], offset=res_datalen))
|
||||
|
||||
return res
|
||||
|
||||
|
||||
def parse_packet(data):
|
||||
tag, operation, size = struct.unpack_from("BBB", data)
|
||||
_unpacked = struct.unpack_from(f"<{size}BH", data, offset=3)
|
||||
crc = _unpacked[-1]
|
||||
payload = _unpacked[:-1]
|
||||
calculated_crc = modbus(bytes([tag, operation, size, *payload]))
|
||||
|
||||
if crc != calculated_crc:
|
||||
e = ValueError(f"CRC missmatch: expected {crc:04X}, got {calculated_crc:04X}.")
|
||||
e.tag = tag
|
||||
e.operation = operation
|
||||
e.size = size
|
||||
e.payload = payload
|
||||
e.crc = crc
|
||||
e.calculated_crc = calculated_crc
|
||||
raise e
|
||||
|
||||
return payload
|
||||
|
||||
|
||||
def discardUntil(fh: RawIOBase, byte: int, timeout=10) -> Optional[int]:
|
||||
assert byte >= 0 and byte < 256, f"byte: Expected 8bit unsigned int, got {byte}"
|
||||
|
||||
def expand(b: Optional[bytes]):
|
||||
if b is None:
|
||||
return b
|
||||
return b[0]
|
||||
|
||||
start = time.time()
|
||||
discarded = 0
|
||||
read_byte = expand(fh.read(1))
|
||||
while read_byte != byte:
|
||||
|
||||
if read_byte is not None:
|
||||
if not discarded:
|
||||
log("Discarding", end="")
|
||||
discarded += 1
|
||||
print(f" {read_byte:02X}", end="")
|
||||
sys.stdout.flush()
|
||||
|
||||
if time.time() - start > timeout:
|
||||
read_byte = None
|
||||
break
|
||||
|
||||
read_byte = expand(fh.read(1))
|
||||
|
||||
if discarded:
|
||||
print()
|
||||
sys.stdout.flush()
|
||||
|
||||
return read_byte
|
||||
|
||||
|
||||
def readMemory(fh: RawIOBase, address: int, words: int = 1) -> Optional[bytes]:
|
||||
# log(f"Reading {words} words from 0x{address:04X}")
|
||||
request = construct_request(address, words=words)
|
||||
# log("Request:", request)
|
||||
write(fh, request)
|
||||
|
||||
tag = discardUntil(fh, 0xFF)
|
||||
if tag is None:
|
||||
return None
|
||||
|
||||
header = fh.read(2)
|
||||
if header and len(header) == 2:
|
||||
operation, size = header
|
||||
data = fh.read(size)
|
||||
_crc = fh.read(2)
|
||||
if data and _crc:
|
||||
try:
|
||||
crc = struct.unpack_from("<H", _crc)[0]
|
||||
except struct.error:
|
||||
log(f"readMemory: CRC error; read {len(_crc)} bytes (2 expected)")
|
||||
return None
|
||||
calculated_crc = modbus(bytes([tag, operation, size, *data]))
|
||||
if crc == calculated_crc:
|
||||
return data
|
||||
else:
|
||||
log(f"readMemory: CRC error; {crc:04X} != {calculated_crc:04X}")
|
||||
log("data or crc is falsely", header, data, _crc)
|
||||
return None
|
||||
|
||||
|
||||
def try_read_parse(
|
||||
dev: BTLEUart,
|
||||
address: int,
|
||||
words: int = 1,
|
||||
parser: Optional[Callable] = None,
|
||||
attempts=5,
|
||||
) -> Optional[dict]:
|
||||
while attempts:
|
||||
attempts -= 1
|
||||
res = readMemory(dev, address, words)
|
||||
if res:
|
||||
try:
|
||||
if parser:
|
||||
return parser(res)
|
||||
except struct.error as e:
|
||||
log(e)
|
||||
log("0x0100 Unpack error:", len(res), res)
|
||||
log("Flushed from read buffer; ", dev.read(timeout=0.5))
|
||||
else:
|
||||
log(f"No data read, expected {words*2} bytes (attempts left: {attempts})")
|
||||
return None
|
||||
63
srnemqtt/util.py
Normal file
63
srnemqtt/util.py
Normal file
|
|
@ -0,0 +1,63 @@
|
|||
# -*- coding: utf-8 -*-
|
||||
|
||||
import datetime
|
||||
import sys
|
||||
import time
|
||||
from typing import Optional
|
||||
|
||||
# Only factor of 1000
|
||||
SI_PREFIXES_LARGE = "kMGTPEZY"
|
||||
SI_PREFIXES_SMALL = "mµnpfazy"
|
||||
|
||||
|
||||
def humanize_number(data, unit: str = ""):
|
||||
counter = 0
|
||||
|
||||
while data >= 1000:
|
||||
data /= 1000
|
||||
counter += 1
|
||||
if counter >= len(SI_PREFIXES_LARGE):
|
||||
break
|
||||
|
||||
while data < 1:
|
||||
data *= 1000
|
||||
counter -= 1
|
||||
if abs(counter) >= len(SI_PREFIXES_SMALL):
|
||||
break
|
||||
|
||||
if not counter:
|
||||
prefix = ""
|
||||
elif counter > 0:
|
||||
prefix = SI_PREFIXES_LARGE[counter - 1]
|
||||
elif counter < 0:
|
||||
prefix = SI_PREFIXES_SMALL[abs(counter) - 1]
|
||||
|
||||
return f"{data:.3g} {prefix}{unit}"
|
||||
|
||||
|
||||
def log(*message: object, **kwargs):
|
||||
print(datetime.datetime.utcnow().isoformat(" "), *message, **kwargs)
|
||||
sys.stdout.flush()
|
||||
|
||||
|
||||
class Periodical:
|
||||
prev: float
|
||||
interval: float
|
||||
|
||||
def __init__(self, interval: float, start: Optional[float] = None):
|
||||
self.prev = time.time() - interval if start is None else start
|
||||
self.interval = interval
|
||||
|
||||
def __call__(self, now: Optional[float] = None) -> bool:
|
||||
if now is None:
|
||||
now = time.time()
|
||||
|
||||
if (now - self.prev) >= self.interval:
|
||||
skipped, overshoot = divmod(now - self.prev, self.interval)
|
||||
skipped -= 1
|
||||
if skipped:
|
||||
log("Skipped:", skipped, overshoot, now - self.prev, self.interval)
|
||||
self.prev = now - overshoot
|
||||
return True
|
||||
|
||||
return False
|
||||
Loading…
Reference in a new issue