marc,
the problem is that pyusb/libusb should timeout when a write/read fails,
but that is not happening. but if the write/read is not failing, why are
we suddenly not getting any logging?
this really smells like a hardware problem, or perhaps something with your
system's logging configuration.
try the attached wh23xx-0.8p1.py
it does non-debug logging before and after every interrupt write to the usb.
m
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#!/usr/bin/env python
# Copyright 2016 Matthew Wall, all rights reserved
# Distributed under the terms of the GPLv3
#
# Thanks to Lloyd Kinsella
"""
Collect data from Fine Offset WH23xx stations, including:
WH2300 (with RCC)
WH2301 (no RCC)
WH4000
Tycon TP2700
Based on the protocol specified in "TP2700 EEPROM data structure" V1.0 with
serial number FOS-ENG-022-A for model WH2300, and "TP2700 PC Protocol".
The console works with the all-in-one instrument cluster, or the separate
instruments.
The station includes a light sensor. The light sensor output is in lux, but
the station has a multiplicative lux-to-radiation conversion using a constant
in the station, which is factory set to 126.7. The station reports light in
lux, radiation in micro-W per square meter (labelled as UV), and UV index on
a scale of 1-15 (labelled as UVI).
The data logger in the console retains data through a power cycle.
Sensor specifications:
temperature: -40 to 60C
humidity: 1 to 99%
wind speed: 0 to 50 m/s
wind direction: 0 to 359 degree
rainfall: 0 to 9999.9 mm
light: 0 to 300000 lux
UVI: 0 to 15 (0 to 20000 W/m^2)
pressure: 300-1100 hPa
===============================================================================
Current data include the following:
in temperature
out temperature
dewpoint
windchill
heatindex
in humidity
out humidity
abs pressure
rel pressure
wind direction
wind speed
gust speed
rain event
rain rate
rain hour
rain day
rain week
rain month
rain year
rain total
light
uv (radiation)
uv index
===============================================================================
Historical records include the following:
wind direction
wind speed
gust speed
rain total
in humidity
out humidity
in temperature
out temperature
pressure
light
UV (radiation)
The station has 3552 records. Each record is 18 bytes. The timestamp for each
record is stored separately from the record.
===============================================================================
Memory Map
0x0000 to 0x0258 : system, max/min, alarms, etc
0x0259 to 0x02c7 : 110 bytes : page flag structure
each byte is 0x01 to 0x20 or 0xff, indicating how many records in the page
0x02c8 to 0x063f : 110 8-byte segments : table structure (timestamps)
each 8-byte segment is a timestamp
year
month
day
hour
minute
second
interval (lsb)
interval (msb)
0x0640 to 0xffff : records
each record is 18 bytes
===============================================================================
Decoding current weather data
Temperature is value + 40C
Temperature, pressure, wind speed, rainfall, light are value / 10.0
Data are stored as hi byte first then lo byte
For 1 byte word, 0xff indicates invalid
For 2 byte word, 0xffff indicates invalid
For 4 byte word, 0xffffffff indicates invalid
===============================================================================
Commands
TIME_SYNC 0x01 [0x02 0x09]
READ_EEPROM 0x02 [0x02 0x05]
WRITE_EEPROM 0x03
READ_RECORD 0x04 [0x02 0x02]
READ_MAX 0x05 [0x02 0x02]
READ_MIN 0x06 [0x02 0x02]
READ_MAX_DAY 0x07 [0x02 0x02]
READ_MIN_DAY 0x08 [0x02 0x02]
CLEAR_MAX_MIN_DAY 0x09
PARAM_CHANGED 0x0a
CLEAR_HISTORY 0x0b
READ_PARAM 0x0c
CMD_RESULT 0xf0
The checksum in each message is simply the lo byte of the sum of the bytes in
each message.
Time Sync (9 bytes)
TIME_SYNC 1
year 1 0x00-0x99 -> 2000 -> 2099
month 1
day 1
hour 1
minute 1
second 1
1/125 second 1 0x00-0x07
checksum 1
Read EEPROM (5 bytes)
READ_EEPROM 1
address 2 lo hi
size 1 1-56
checksum 1
READ_EEPROM 1
size 1 1-56
data x
checksum 1
Write EEPROM (x bytes)
WRITE_EEPROM 1
address 2 lo hi
size 1 1-12
data x
checksum 1
Read Record (2 bytes)
READ_RECORD 1 read the current value
checksum 1
READ_RECORD 1
size 1
data x
checksum 1
Param Changed (4 bytes)
PARAM_CHANGED 1
parameter 2
checksum 1
parameter values:
0x0001 alarm tag or value changed
0x0002 latitude/longitude/timezone changed
0x0004 parameters have changed
0x0008 max/min value has changed
0x0010 history has been emptied
Read Parameter (2 bytes)
READ_PARAM 1
checksum 1
READ_PARAM 1
size 1
data 1
checksum 1
data values:
bit 0: 01: UART 10: ASK 00: FSK
bit 1: 01: UART function 10: ASK function 00: FSK function
bit 2: 1: RCC 0: no RCC
Command Result
CMD_RESULT 1
CMD 1
result 2
checksum 1
return values:
1 RT_SUCCESS
2 RT_INVALID_USER_PASS
3 RT_INVALID_ID
4 RT_INVALID_CRC
5 RT_BUSY
6 RT_TOO_SIZE
7 RT_ERROR
8 RT_UNKNOWN_CMD
9 RT_INVALID_PARAM
"""
from __future__ import with_statement
import syslog
import time
import usb
import weewx.drivers
from weeutil.weeutil import timestamp_to_string, log_traceback
from weewx.wxformulas import calculate_rain
DRIVER_NAME = 'WH23xx'
DRIVER_VERSION = '0.8p1'
def loader(config_dict, _):
return WH23xxDriver(**config_dict[DRIVER_NAME])
def confeditor_loader():
return WH23xxConfigurationEditor()
def logmsg(level, msg):
syslog.syslog(level, 'wh23xx: %s' % msg)
def logdbg(msg):
logmsg(syslog.LOG_DEBUG, msg)
def loginf(msg):
logmsg(syslog.LOG_INFO, msg)
def logerr(msg):
logmsg(syslog.LOG_ERR, msg)
#' '.join(["%0.2X" % ord(c) for c in buf]))
def _fmt(buf):
if buf:
return "%s (len=%s)" % (' '.join(["%02x" % x for x in buf]), len(buf))
return ''
def _calc_checksum(a):
s = 0
for x in a:
s += x
return s & 0xff
def _get_bit(x, bit):
return 1 if ((x & (1 << bit)) == (1 << bit)) else 0
def _decode_bytes(buf, idx, nbytes, func):
# if all bytes are 0xff, the value is not valid...
for j in range(nbytes):
if buf[idx + j] != 0xff:
break
else:
return None
# ...otherwise, calculate a value from the bytes, MSB first
x = 0
for j in range(nbytes):
x += buf[idx + j] << ((nbytes - j - 1) * 8)
return func(x)
def _signed(x):
v = x & 0xf
if x & 0xf0 == 0xf0:
v *= -1
return v
KNOWN_USB_MESSAGES = [
'No data available', 'No error',
'Nessun dato disponibile', 'Nessun errore',
'Keine Daten verf',
'No hay datos disponibles',
'Pas de donn'
]
# these are the usb 'errors' that should be ignored
def known_usb_err(e):
errmsg = repr(e)
for msg in KNOWN_USB_MESSAGES:
if msg in errmsg:
return True
return False
def get_usb_info():
pyusb_version = '0.4.x'
try:
pyusb_version = usb.__version__
except AttributeError:
pass
return "pyusb_version=%s" % pyusb_version
class WH23xxConfigurationEditor(weewx.drivers.AbstractConfEditor):
@property
def default_stanza(self):
return """
[WH23xx]
# This section is for Fine Offset WH23xx stations
# The model name such as Tycon, or TP2700
model = Tycon TP2700
# The driver to use
driver = user.wh23xx
"""
class WH23xxDriver(weewx.drivers.AbstractDevice):
def __init__(self, **stn_dict):
loginf('driver version is %s' % DRIVER_VERSION)
loginf('usb info: %s' % get_usb_info())
self._model = stn_dict.get('model', 'Tycon TP2700')
self._poll_interval = int(stn_dict.get('poll_interval', 15))
loginf('poll interval is %s' % self._poll_interval)
self.max_tries = int(stn_dict.get('max_tries', 5))
self.retry_wait = int(stn_dict.get('retry_wait', 10))
self.last_rain = None
self._station = WH23xxStation()
self._station.open()
def closePort(self):
self._station.close()
def hardware_name(self):
return self._model
def genLoopPackets(self):
while True:
raw = self._get_current()
logdbg("raw data: %s" % raw)
if raw:
try:
decoded = WH23xxStation.decode_weather_data(raw)
logdbg("decoded data: %s" % decoded)
packet = self._data_to_packet(decoded)
logdbg("packet: %s" % packet)
yield packet
except IndexError, e:
logerr("decode failed: %s (%s)" % (e, _fmt(raw)))
log_traceback(loglevel=syslog.LOG_DEBUG)
time.sleep(self._poll_interval)
def _get_current(self):
ntries = 0
while ntries < self.max_tries:
ntries += 1
try:
return self._station.get_current()
except usb.USBError, e:
if known_usb_err(e):
logdbg("get_current: %s" % e)
ntries -= 1
else:
logerr("get_current: failed attempt %d of %d: %s" %
(ntries, self.max_tries, e))
time.sleep(self.retry_wait)
msg = "read failed: max retries (%d) exceeded" % self.max_tries
logerr(msg)
raise weewx.RetriesExceeded(msg)
def _data_to_packet(self, data):
# convert from the dictionary-of-dictionaries to a simple dictionary
# of observation values.
pkt = {'dateTime': int(time.time() + 0.5), 'usUnits': weewx.METRICWX}
pkt['windDir'] = data.get('wind_dir', {}).get('value')
pkt['windSpeed'] = data.get('wind_speed', {}).get('value')
pkt['windGust'] = data.get('gust_speed', {}).get('value')
pkt['inHumidity'] = data.get('in_humidity', {}).get('value')
pkt['outHumidity'] = data.get('out_humidity', {}).get('value')
pkt['inTemp'] = data.get('in_temp', {}).get('value')
pkt['outTemp'] = data.get('out_temp', {}).get('value')
pkt['pressure'] = data.get('abs_baro', {}).get('value')
pkt['light'] = data.get('light', {}).get('value')
pkt['radiation'] = data.get('uv', {}).get('value')
pkt['UV'] = data.get('uvi', {}).get('value')
rain_total = data.get('rain_totals', {}).get('value')
pkt['rain'] = calculate_rain(rain_total, self.last_rain)
self.last_rain = rain_total
# FIXME: get measure of connectivity to sensors
return pkt
class WH23xxStation(object):
# usb values obtained from 'sudo lsusb -v'
USB_ENDPOINT_IN = 0x82
USB_ENDPOINT_OUT = 0x02
USB_PACKET_SIZE = 0x40 # 64 bytes
# from the vendor documentation
TIME_SYNC = 0x01
READ_EEPROM = 0x02
WRITE_EEPROM = 0x03
READ_RECORD = 0x04
READ_MAX = 0x05
READ_MIN = 0x06
READ_MAX_DAY = 0x07
READ_MIN_DAY = 0x08
CLEAR_MAX_MIN_DAY = 0x09
PARAM_CHANGED = 0x0a
CLEAR_HISTORY = 0x0b
READ_PARAM = 0x0c
CMD_RESULT = 0xf0
PARAM_ITEM_ALARM = 0x0001
PARAM_ITEM_TIMEZONE = 0x0002
PARAM_ITEM_PARAM = 0x0004
PARAM_ITEM_MAX_MIN = 0x0008
PARAM_ITEM_HISTORY = 0x0010
RT_SUCCESS = 0x0000
RT_INVALID_USER_PASS = 0x0001
RT_INVALID_ID = 0x0002
RT_INVALID_CRC = 0x0004
RT_BUSY = 0x0008
RT_TOO_SIZE = 0x0010
RT_ERROR = 0x0020
RT_UNKNOWN_CMD = 0x0040
RT_INVALID_PARAM = 0x0080
INVALID_DATA_8 = 0xff
INVALID_DATA_16 = 0xffff
INVALID_DATA_32 = 0xffffffff
ITEM_INTEMP = 0x01 # C
ITEM_OUTTEMP = 0x02 # C
ITEM_DEWPOINT = 0x03 # C
ITEM_WINDCHILL = 0x04 # C
ITEM_HEATINDEX = 0x05 # C
ITEM_INHUMI = 0x06 # %
ITEM_OUTHUMI = 0x07 # %
ITEM_ABSBARO = 0x08 # mbar
ITEM_RELBARO = 0x09 # mbar
ITEM_WINDDIRECTION = 0x0a # degree
ITEM_WINDSPEED = 0x0b # m/s
ITEM_GUSTSPEED = 0x0c # m/s
ITEM_RAINEVENT = 0x0d # mm
ITEM_RAINRATE = 0x0e # mm/h
ITEM_RAINHOUR = 0x0f # mm
ITEM_RAINDAY = 0x10 # mm
ITEM_RAINWEEK = 0x11 # mm
ITEM_RAINMONTH = 0x12 # mm
ITEM_RAINYEAR = 0x13 # mm
ITEM_RAINTOTALS = 0x14 # mm
ITEM_LIGHT = 0x15 # lux
ITEM_UV = 0x16 # uW/m^2
ITEM_UVI = 0x17 # 0-15 index
ITEM_TIME = 0x40
ITEM_DATE = 0x80
def __init__(self):
self.vendor_id = 0x10c4
self.product_id = 0x8468
self.iface = 0
self.timeout = 1000
self.devh = None
def __enter__(self):
self.open()
return self
def __exit__(self, _, value, traceback):
self.close()
def open(self):
dev = self._find_dev(self.vendor_id, self.product_id)
if not dev:
logerr("Cannot find USB device with VendorID=0x%04x ProductID=0x%04x" % (self.vendor_id, self.product_id))
raise weewx.WeeWxIOError('Unable to find station on USB')
self.devh = dev.open()
if not self.devh:
raise weewx.WeeWxIOError('Open USB device failed')
# be sure kernel does not claim the interface on linux systems
try:
self.devh.detachKernelDriver(self.iface)
except (AttributeError, usb.USBError):
pass
# attempt to unwedge the device
self._reset()
# attempt to claim the interface
try:
self.devh.claimInterface(self.iface)
self.devh.setAltInterface(self.iface)
except usb.USBError, e:
self.close()
logerr("Unable to claim USB interface %s: %s" % (self.iface, e))
raise weewx.WeeWxIOError(e)
def close(self):
if self.devh:
try:
self.devh.releaseInterface()
except (ValueError, usb.USBError), e:
logerr("release interface failed: %s" % e)
self.devh = None
def _reset(self):
# use a usb reset to restore communication with the station.
# specific cases include when you do an interrupt write with bogus
# data. use a reset to bring the station back to responsiveness.
# unfortunately it is not immediate. sometimes it takes one reset.
# sometimes it takes multiple resets.
for x in range(5):
try:
self.devh.reset()
break
except usb.USBError, e:
logdbg("usb reset failed: %s" % e)
time.sleep(2)
@staticmethod
def _find_dev(vendor_id, product_id):
"""Find the vendor and product ID on the USB."""
for bus in usb.busses():
for dev in bus.devices:
if dev.idVendor == vendor_id and dev.idProduct == product_id:
loginf('Found device on USB bus=%s device=%s' %
(bus.dirname, dev.filename))
return dev
return None
def _write(self, label, buf):
logdbg("%s: write: %s" % (label, _fmt(buf)))
cnt = self.devh.interruptWrite(self.USB_ENDPOINT_OUT, buf, self.timeout)
logerr("%s: wrote %s bytes" % (label, len(buf))) # FIXME: remove this
if cnt != len(buf):
raise weewx.WeeWxIOError('%s: bad write length=%s for command %s' %
(label, cnt, _fmt(buf)))
def _time_sync(self, ts):
logdbg("time sync to %s (%s)" % (ts, timestamp_to_string(ts)))
t = time.localtime(ts)
cmd = [WH23xxStation.TIME_SYNC,
t.tm_year - 2000, t.tm_mon, t.tm_mday,
t.tm_hour, t.tm_min, t.tm_sec, 0]
chksum = _calc_checksum(cmd)
buf = [0x02, 0x09]
buf.extend(cmd)
buf.append(chksum)
self._write("time_sync", buf)
def _read_eeprom(self, addr, size):
# initiate a read by sending the READ_EEPROM command.
addr_lo = addr & 0xff
addr_hi = (addr / 256) & 0xff
cmd = [WH23xxStation.READ_EEPROM, addr_lo, addr_hi, size]
chksum = _calc_checksum(cmd)
buf = [0x02, 0x05]
buf.extend(cmd)
buf.append(chksum)
self._write("read_eeprom", buf)
# now do the actual read.
buf = self.devh.interruptRead(
self.USB_ENDPOINT_IN,
self.USB_PACKET_SIZE,
self.timeout)
if not buf:
raise weewx.WeeWxIOError('read_eeprom failed: empty read')
logdbg("read_eeprom: buf: %s" % _fmt(buf))
if buf[0] != 0x01 or buf[2] != WH23xxStation.READ_EEPROM:
raise weewx.WeeWxIOError('read_eeprom: bad reply: '
'got %02x %02x %02x %02x, '
'exp 01 .. %02x ..' %
(buf[0], buf[1], buf[2], buf[3],
WH23xxStation.READ_EEPROM))
logdbg("read_eeprom: size: %s" % buf[3])
return buf[4:]
def _read_record(self):
# initiate a read by sending the READ_RECORD command.
buf = [0x02, 0x02,
WH23xxStation.READ_RECORD,
WH23xxStation.READ_RECORD]
self._write("read_record", buf)
logerr("read_record: write complete") # FIXME: remove this
# now do the actual read. the station should respond with a single
# READ_RECORD response spread over (probably) multiple USB packets.
# each USB packet starts with two bytes, 0x01 followed by the usb
# packet size. we check these, but ignore them. the response
# contains the READ_RECORD reply, the size of the reply data, the
# reply data, and a checksum.
tmp = []
record_size = 0
logerr("read_record: do interrupt read") # FIXME: remove this
buf = self.devh.interruptRead(
self.USB_ENDPOINT_IN,
self.USB_PACKET_SIZE,
self.timeout)
if not buf:
logdbg("read_record: empty read")
return None
logdbg("read_record: buf: %s" % _fmt(buf))
if buf[0] != 0x01:
raise weewx.WeeWxIOError('read_record: bad first byte: '
'0x%02x != 0x01' % buf[0])
if buf[2] != WH23xxStation.READ_RECORD:
raise weewx.WeeWxIOError('read_record: missing READ_RECORD: '
'0x%02x != 0x%02x' %
(buf[2], WH23xxStation.READ_RECORD))
record_size = buf[3]
logdbg("read_record: record_size: %s" % record_size)
tmp.extend(buf[4:]) # skip 0x01, payload_size, 0x04, record_size
cnt = 0
max_cnt = 20
while len(tmp) < record_size and cnt < max_cnt:
cnt += 1
buf = self.devh.interruptRead(
self.USB_ENDPOINT_IN,
self.USB_PACKET_SIZE,
self.timeout)
logdbg("read_record: buf: %s" % _fmt(buf))
tmp.extend(buf[2:]) # skip 0x01 and payload_size
if cnt >= max_cnt:
raise weewx.WeeWxIOError("read_record: suspicious packets")
rbuf = tmp[0:record_size] # prune off any dangling bytes
# verify the checksum for the record
tmp = [WH23xxStation.READ_RECORD, record_size]
tmp.extend(rbuf)
chksum = _calc_checksum(tmp)
logdbg("read_record: rbuf: %s chksum=0x%02x" %
(_fmt(rbuf), chksum))
return rbuf
def _clear_max_min(self):
logdbg("clear max/min")
buf = [0x02, 0x02,
WH23xxStation.CLEAR_MAX_MIN_DAY,
WH23xxStation.CLEAR_MAX_MIN_DAY]
self._write("clear_max_min", buf)
logdbg("max/min cleared")
def _clear_history(self):
logdbg("clear history")
buf = [0x02, 0x02,
WH23xxStation.CLEAR_HISTORY,
WH23xxStation.CLEAR_HISTORY]
self._write("clear_history", buf)
logdbg("history cleared")
def get_current(self):
return self._read_record()
def sync_time(self):
self._time_sync(time.time())
def clear_max_min(self):
self._clear_max_min()
def clear_history(self):
self._clear_history()
def get_station_info(self):
# decode the memory starting at address 0x0, which contains the station
# status and configuration info. return the data as a dictionary.
buf = self._read_eeprom(0x0000, 56)
return self.decode_station_info(buf)
# this map associates the item identifier with [label, num_bytes, function]
# required for decoding weather data from raw bytes.
ITEM_MAPPING = {
ITEM_INTEMP: ['in_temp', 2, lambda x : x / 10.0 - 40.0],
ITEM_OUTTEMP: ['out_temp', 2, lambda x : x / 10.0 - 40.0],
ITEM_DEWPOINT: ['dewpoint', 2, lambda x : x / 10.0 - 40.0],
ITEM_WINDCHILL: ['windchill', 2, lambda x : x / 10.0 - 40.0],
ITEM_HEATINDEX: ['heatindex', 2, lambda x : x / 10.0 - 40.0],
ITEM_INHUMI: ['in_humidity', 1, lambda x : x],
ITEM_OUTHUMI: ['out_humidity', 1, lambda x : x],
ITEM_ABSBARO: ['abs_baro', 2, lambda x : x / 10.0],
ITEM_RELBARO: ['rel_baro', 2, lambda x : x / 10.0],
ITEM_WINDDIRECTION: ['wind_dir', 2, lambda x : x],
ITEM_WINDSPEED: ['wind_speed', 2, lambda x : x / 10.0],
ITEM_GUSTSPEED: ['gust_speed', 2, lambda x : x / 10.0],
ITEM_RAINEVENT: ['rain_event', 4, lambda x : x / 10.0],
ITEM_RAINRATE: ['rain_rate', 4, lambda x : x / 10.0],
ITEM_RAINHOUR: ['rain_hour', 4, lambda x : x / 10.0],
ITEM_RAINDAY: ['rain_day', 4, lambda x : x / 10.0],
ITEM_RAINWEEK: ['rain_week', 4, lambda x : x / 10.0],
ITEM_RAINMONTH: ['rain_month', 4, lambda x : x / 10.0],
ITEM_RAINYEAR: ['rain_year', 4, lambda x : x / 10.0],
ITEM_RAINTOTALS: ['rain_totals', 4, lambda x : x / 10.0],
ITEM_LIGHT: ['light', 4, lambda x : x / 10.0],
ITEM_UV: ['uv', 2, lambda x : x / 1000.0],
ITEM_UVI: ['uvi', 1, lambda x : x],
}
@staticmethod
def decode_weather_data(raw):
# decode a sequence of bytes into current weather data. the sequence
# can be variable length. an identifier byte is followed by one to
# four data bytes. identifier bytes have a value of ITEM_* bitwise
# or with date and/or time if there is an associated time.
#
# so we simply walk the array, decoding as we go. put the result into
# a dictionary that contains a dictionary for each observation.
#
# if there is a failure, log it and bail out.
data = dict()
i = 0
while i < len(raw):
item = item_raw = raw[i]
i += 1
has_date = (item & WH23xxStation.ITEM_DATE) != 0
has_time = (item & WH23xxStation.ITEM_TIME) != 0
if has_date:
item = item & ~WH23xxStation.ITEM_DATE
if has_time:
item = item & ~WH23xxStation.ITEM_TIME
label = None
obs = dict()
mapping = WH23xxStation.ITEM_MAPPING.get(item)
if mapping:
if i + mapping[1] - 1 >= len(raw):
raise weewx.WeeWxIOError(
"not enough bytes for %s: idx=%s numbytes=%s bytes=%s"
% (mapping[0], i, mapping[1], raw))
# bytes are decoded MSB first, then function is applied
label = mapping[0]
obs['value'] = _decode_bytes(raw, i, mapping[1], mapping[2])
i += mapping[1]
else:
logerr("no mapping for item id 0x%02x (0x%02x)"
" at index %s of %s" % (item, item_raw, i-1, _fmt(raw)))
raise weewx.WeeWxIOError("no mapping for id 0x%02x" % item)
if has_date:
# year.month.day
obs['date'] = "%04d.%02d.%02d" % (
2000 + raw[i], raw[i+1], raw[i+2])
i += 3
if has_time:
# hour:minute
obs['time'] = "%02d:%02d" % (raw[i], raw[i+1])
i += 2
# workaround firmware bug for invalid light value
if (item == WH23xxStation.ITEM_LIGHT and
obs['value'] == 0xffffff / 10.0):
obs['value'] = None
logdbg("%s: %s (0x%02x 0x%02x)" % (label, obs, item, item_raw))
data[label] = obs
return data
@staticmethod
def decode_history_record(raw):
# each record is 18 bytes
#
# NOTE: the docs specify values for invalid that do not make sense:
# light: 0xfff specified, using 0xffffff
# uv: 0xff specified, using 0xffff
# wind_dir: 0x1f specified, using 0x1ff
data = dict()
if not raw:
logdbg("empty raw data")
return data
if len(raw) != 18:
logdbg("wrong number of bytes in raw data: %s != 18" % len(raw))
return data
x = ((raw[0] & 0x01) << 8) + raw[1]
data['wind_dir'] = None if x == 0x1ff else x # compass degree
x = (((raw[0] & 0x02) / 0x02) << 8) + raw[2]
data['wind_speed'] = None if x == 0x1ff else x / 10.0 # m/s
x = (((raw[0] & 0x04) / 0x04) << 8) + raw[3]
data['gust_speed'] = None if x == 0x1ff else x / 10.0 # m/s
data['rain_total'] = ((((raw[0] & 0x08) / 0x08) << 16) + (raw[5] << 8) + raw[4]) * 0.1 # 0.0-9999.9 mm
data['rain_overflow'] = (raw[0] & 0x10) / 0x10 # bit 4
data['no_sensors'] = (raw[0] & 0x80) / 0x80 # bit 7
data['humidity_in'] = None if raw[6] == 0xff else raw[6]
data['humidity_out'] = None if raw[7] == 0xff else raw[7]
x = ((raw[9] & 0x0f) << 8) + raw[8]
data['temperature_in'] = None if x == 0xfff else x / 10.0 - 40.0 # C
x = ((raw[9] & 0xf0) << 8) + raw[10]
data['temperature_out'] = None if x == 0xfff else x / 10.0 - 40.0 # C
x = (raw[11] << 8) + raw[12]
data['pressure'] = None if x == 0xffff else x / 10.0 # hpa
x = (raw[15] << 16) + (raw[14] << 8) + raw[13]
data['light'] = None if x == 0xffffff else x / 10.0 # 0.0-300000.0 lux
x = (raw[17] << 8) + raw[16]
data['uv'] = None if x == 0xffff else x / 1000.0 # 0-20000 W/m^2
return data
@staticmethod
def decode_station_info(raw):
data = dict()
data['eeprom'] = "0x%02x%02x" % (raw[0], raw[1]) # 0x55aa
data['model'] = "0x%02x%02x" % (raw[2], raw[3]) # 0x0023
data['version'] = "0x%02x" % raw[4] # 0x10
data['id'] = "0x%02x%02x%02x%02x" % (raw[5], raw[6], raw[7], raw[8])
for i in range(0, 8):
data['factory_unit_flag_1_bit%s' % i] = _get_bit(raw[0x09], i)
for i in range(0, 8):
data['factory_unit_flag_2_bit%s' % i] = _get_bit(raw[0x0a], i)
for i in range(0, 8):
data['option_1_bit%s' % i] = _get_bit(raw[0x0b], i)
for i in range(0, 8):
data['option_2_bit%s' % i] = _get_bit(raw[0x0c], i)
data['mode'] = 'ASK' if (raw[0x0c] & 0xf0) == 0xf0 else 'UART'
data['lux_to_rad_factor'] = (raw[0x0e] * 256 + raw[0x0d]) / 10.0
for i in range(0, 8):
data['unit_setting_flag_1_bit%s' % i] = _get_bit(raw[0x10], i)
for i in range(0, 8):
data['unit_setting_flag_2_bit%s' % i] = _get_bit(raw[0x11], i)
for i in range(0, 8):
data['display_setting_flag_1_bit%s' % i] = _get_bit(raw[0x12], i)
for i in range(0, 8):
data['display_setting_flag_2_bit%s' % i] = _get_bit(raw[0x13], i)
for i in range(0, 8):
data['display_setting_flag_3_bit%s' % i] = _get_bit(raw[0x14], i)
for i in range(0, 8):
data['alarm_enable_flag_1_bit%s' % i] = _get_bit(raw[0x15], i)
for i in range(0, 8):
data['alarm_enable_flag_2_bit%s' % i] = _get_bit(raw[0x16], i)
for i in range(0, 8):
data['alarm_enable_flag_3_bit%s' % i] = _get_bit(raw[0x17], i)
data['rain_season'] = raw[0x18] # month 1..12
data['interval'] = raw[0x1a] * 256 + raw[0x19] # seconds 8..14400 (240m)
data['lcd_contrast'] = "%s (0x%02x)" % (raw[0x1b]-0x16, raw[0x1b]) # 0x17..0x1f
data['timezone'] = _signed(raw[0x1c]) # -12..12
data['latitude'] = raw[0x1e] * 256 + raw[0x1d]
data['longitude'] = raw[0x20] * 256 + raw[0x1f]
data['weather'] = raw[0x21]
data['storm'] = raw[0x22]
data['offset_temperature_in'] = (raw[0x24] * 256 + raw[0x23]) / 10.0
data['offset_humidity_in'] = raw[0x25]
data['offset_temperature_out'] = (raw[0x27] * 256 + raw[0x26]) / 10.0
data['offset_humidity_out'] = raw[0x28]
data['offset_pressure_abs'] = (raw[0x2a] * 256 + raw[0x29]) / 10.0
data['offset_pressure_rel'] = (raw[0x2c] * 256 + raw[0x2b]) / 10.0
data['offset_wind_dir'] = raw[0x2e] * 256 + raw[0x2d]
data['coefficient_wind'] = raw[0x2f] / 100.0 # 0.1..2.5
data['coefficient_rain'] = raw[0x30] / 100.0 # 0.1..2.5
data['coefficient_light'] = (raw[0x32] * 256 + raw[0x31]) / 100.0 # 0.1..10.0
data['coefficient_uv'] = (raw[0x34] * 256 + raw[0x33]) / 100.0 # 0.1..10.0
return data
# define a main entry point for basic testing of the station. invoke this as
# follows from the weewx root dir:
#
# PYTHONPATH=bin python bin/user/wh23xx.py
if __name__ == '__main__':
INFO_DATA = [
"55 aa 00 23 10 bc 7a 28 28 52 a2 01 02 f3 04 ff 53 a2 01 4a b2 00 00 00 01 2c 01 1b fb 00 00 00 00 03 04 00 00 00 00 00 00 00 00 c3 ff 00 00 64 64 64 00 64 00 ff ff ff 6b",
]
CURRENT_DATA = [
"01 02 8f 02 02 13 03 02 11 04 02 13 05 02 13 06 32 07 63 08 27 f0 09 27 b2 0a 00 5a 0b 00 2b 0c 00 3b 0e 00 00 00 00 10 00 00 00 75 11 00 00 00 a2 12 00 00 00 75 13 00 00 04 c5 14 00 00 04 c5 15 00 ff ff ff 16 ff ff 17 ff",
"01 02 90 02 02 13 03 02 11 04 02 13 05 02 13 06 32 07 63 08 27 f0 09 27 b2 0a 00 5a 0b 00 17 0c 00 21 0e 00 00 00 00 10 00 00 00 75 11 00 00 00 a2 12 00 00 00 75 13 00 00 04 c5 14 00 00 04 c5 15 00 ff ff ff 16 ff ff 17 ff",
]
HISTORY_DATA = [
"",
"",
]
CORE_PARAMETERS = ['eeprom', 'id', 'interval', 'latitude', 'longitude',
'mode', 'model', 'timezone', 'version']
def print_info(x, display_keys=None):
keys = x.keys() if not display_keys else list(set(x.keys()) & set(display_keys))
keys.sort()
for k in keys:
print "%s: %s" % (k, x[k])
import optparse
usage = """%prog [options] [--debug] [--help]"""
syslog.openlog('wh23xx', syslog.LOG_PID | syslog.LOG_CONS)
syslog.setlogmask(syslog.LOG_UPTO(syslog.LOG_INFO))
parser = optparse.OptionParser(usage=usage)
parser.add_option('--version', dest='version', action='store_true',
help='display driver version')
parser.add_option('--debug', dest='debug', action='store_true',
help='display diagnostic information while running')
parser.add_option('--action', dest='action', default='current',
help='actions include: info, info-all, current, test-decode-info, test-decode-current, test-decode-history, dump')
(options, args) = parser.parse_args()
if options.version:
print "driver version %s" % DRIVER_VERSION
exit(1)
if options.debug:
syslog.setlogmask(syslog.LOG_UPTO(syslog.LOG_DEBUG))
if options.action == 'info':
with WH23xxStation() as s:
print_info(s.get_station_info(), CORE_PARAMETERS)
elif options.action == 'info-all':
with WH23xxStation() as s:
print_info(s.get_station_info())
elif options.action == 'current':
with WH23xxStation() as s:
while True:
raw = s.get_current()
if options.debug:
print _fmt(raw)
print WH23xxStation.decode_weather_data(raw)
time.sleep(5)
elif options.action == 'sync-time':
with WH23xxStation() as s:
s.sync_time()
elif options.action == 'clear-history':
with WH23xxStation() as s:
s.clear_history()
elif options.action == 'test-decode-info':
for row in INFO_DATA:
raw = [int(x, 16) for x in row.split()]
print _fmt(raw)
print WH23xxStation.decode_station_info(raw)
elif options.action == 'test-decode-current':
for row in CURRENT_DATA:
raw = [int(x, 16) for x in row.split()]
print _fmt(raw)
print WH23xxStation.decode_weather_data(raw)
elif options.action == 'test-decode-history':
for row in HISTORY_DATA:
raw = [int(x, 16) for x in row.split()]
print _fmt(raw)
print WH23xxStation.decode_history_record(raw)
elif options.action == 'eeprom-time':
with WH23xxStation() as s:
raw = s._read_eeprom(0x02c8, 8)
print _fmt(raw[0:8])
print "%04d.%02d.%02d %02d:%02d %ss" % (
2000 + raw[0], raw[1], raw[2], raw[3], raw[4],
raw[5] + raw[6] * 256)
elif options.action == 'dump':
with WH23xxStation() as s:
size = 0x20
for i in range(0x0000, 0xffff, size):
for n in range(0, 3):
try:
raw = s._read_eeprom(i, 0x20)
print "%04x" % i, _fmt(raw[:size])
break
except Exception, e:
print "failed read %d of 3 for 0x%04x: %s" % (n+1, i, e)
print "waiting 3 seconds before retry"
time.sleep(3)
else:
raise Exception("retries failed")
