Possibly, but I don't think so. The way I read the documents, a given instrument has a given buffer length. Yours seems to be 52 bytes, which is what the driver is expecting.
The trouble is there is a communications glitch. Then the number of bytes may be unknown. It would help if you could include the log for one of these glitches. Be sure to not only set debug=1 at the top of weewx.conf, but also set debug_serial in the [Ultimeter] section: debug = 1 ... [Ultimeter] port = XXX debug_serial = 1 At the risk of confusing things, here's another version of the driver. This one looks for the number of bytes in the serial port buffer, then reads exactly that many. So, it should work for 48, 50, or 52 byte buffers. But, it could still have a sync problem. -tk On Thu, Feb 21, 2019 at 5:39 AM Steve2Q <stev...@gmail.com> wrote: > A follow up: According to Peet Bros web site the Ultimeter 2100 (and > several other models) emit data in 48 byte chunks in Data Logger Mode, > while ultimeter.py (version .20) apparently expects 52 bytes. Could this be > the problem?. Here is a snip from their web site: > > > - *Data Logger Mode**: to manually select, press CLEAR + WIND SPEED > for 3 seconds. ** While in this mode, records are sent out > continuously at up to about 120 per minute. The total record size is 48 > hex digits + header, carriage return and line feed. (All models)* > - *Packet Mode**: to manually select, press CLEAR + WIND CHILL for 3 > seconds. While in this mode, one record is output every five minutes (at 5 > min past the hour, 10 min past, 15 min past, etc.). The total record length > is 52 hex digits + header, carriage return and line feed. (All models)* > > and this: > > *DATA LOGGER MODE - RECORD STRUCTURE* > > - *Header = !! (or || if in Multiple Output Mode) * > - *Data Fields * > - *1. Wind Speed (0.1 kph) * > - *2. Wind Direction (0-255) * > - *3. Outdoor Temp (0.1 deg F) * > - *4. Rain* Long Term Total (0.01 inches) * > - *5. Barometer (0.1 mbar) * > - *6. Indoor Temp (0.1 deg F) * > - *7. Outdoor Humidity (0.1%) * > - *8. Indoor Humidity (0.1%) * > - *9. Date (day of year) * > - *10. Time (minute of day) * > - *11. Today's Rain Total (0.01 inches)* * > - *12. 1 Minute Wind Speed Average (0.1kph)* * > - *Carriage Return & Line Feed * > > > **Some instruments may not include field 12, some may not include 11 or > 12. Please contact Peet Bros. if this presents any problem. Total size: 40, > 44 or 48 characters (hex digits) + header, carriage return and line feed. * > > *PACKET MODE - RECORD STRUCTURE* > > - *Header = $ULTW * > - *Data Fields * > - *1. Wind Speed Peak over last 5 min. (0.1 kph) * > - *2. Wind Direction of Wind Speed Peak (0-255) * > - *3. Current Outdoor Temp (0.1 deg F) * > - *4. Rain Long Term Total (0.01 in.) * > - *5. Current Barometer (0.1 mbar) * > - *6. Barometer Delta Value(0.1 mbar) * > - *7. Barometer Corr. Factor(LSW) * > - *8. Barometer Corr. Factor(MSW) * > - *9. Current Outdoor Humidity (0.1%) * > - *10. Date (day of year) * > - *11. Time (minute of day) * > - *12. Today's Rain Total (0.01 inches)** > - *13. 5 Minute Wind Speed Average (0.1kph)* * > - *Carriage Return & Line Feed* > > > > **Some instruments may not include field 13, some may not include 12 or > 13. Please contact Peet Bros. if this presents any problem. * > > *Packet Mode records are output every five minutes: first, upon selection > of Packet Mode; then, at every 5 minutes past the hour (12:00, 12:05, > 12:10, etc.), continuosly.* > > *Total size: 44, 48 or 52 characters (hex digits) + header, carriage > return and line feed. * > > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
#!/usr/bin/env python # # Copyright 2014 Matthew Wall # Copyright 2014 Nate Bargmann <n...@n0nb.us> # See the file LICENSE.txt for your rights. # # Credit to and contributions from: # Jay Nugent (WB8TKL) and KRK6 for weather-2.kr6k-V2.1 # http://server1.nuge.com/~weather/ # Steve (sesykes71) for testing the first implementations of this driver # Garret Power for improved decoding and proper handling of negative values # Chris Thompstone for testing the fast-read implementation # # Thanks to PeetBros for publishing the communication protocols and details # about each model they manufacture. """Driver for Peet Bros Ultimeter weather stations except the Ultimeter II This driver assumes the Ultimeter is emitting data in Peet Bros Data Logger mode format. This driver will set the mode automatically on stations manufactured after 2004. Stations manufactured before 2004 must be set to data logger mode using the buttons on the console. Resources for the Ultimeter stations Ultimeter Models 2100, 2000, 800, & 100 serial specifications: http://www.peetbros.com/shop/custom.aspx?recid=29 Ultimeter 2000 Pinouts and Parsers: http://www.webaugur.com/ham-radio/52-ultimeter-2000-pinouts-and-parsers.html Ultimeter II not supported by this driver All models communicate over an RS-232 compatible serial port using three wires--RXD, TXD, and Ground (except Ultimeter II which omits TXD). Port parameters are 2400, 8N1, with no flow control. The Ultimeter hardware supports several "modes" for providing station data to the serial port. This driver utilizes the "modem mode" to set the date and time of the Ultimeter upon initialization and then sets it into Data Logger mode for continuous updates. Modem Mode commands used by the driver >Addddmmmm Set Date and Time (decimal digits dddd = day of year, mmmm = minute of day; Jan 1 = 0000, Midnight = 0000) >I Set output mode to Data Logger Mode (continuous output) See http://www.peetbros.com/shop/custom.aspx?recid=29 CHANGE HISTORY -------------------------------- 0.20 02/13/2019 Changed from using serial.readline() to serial.read(). Ported to Python 3 -tk 0.21 02/21/2019 Now uses serial.inWaiting() to get the number of bytes to be read, instead of using a fixed number. """ from __future__ import with_statement from __future__ import print_function import serial import syslog import time import weewx.drivers import weewx.wxformulas from weewx.units import INHG_PER_MBAR, MILE_PER_KM from weeutil.weeutil import timestamp_to_string DRIVER_NAME = 'Ultimeter' DRIVER_VERSION = '0.21' def loader(config_dict, _): return UltimeterDriver(**config_dict[DRIVER_NAME]) def confeditor_loader(): return UltimeterConfEditor() def logmsg(level, msg): syslog.syslog(level, 'ultimeter: %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) def _fmt(x): return ' '.join([b"%0.2X" % ord(c) for c in x]) class UltimeterDriver(weewx.drivers.AbstractDevice): """weewx driver that communicates with a Peet Bros Ultimeter station model: station model, e.g., 'Ultimeter 2000' or 'Ultimeter 100' [Optional. Default is 'Ultimeter'] port - serial port [Required. Default is /dev/ttyUSB0] max_tries - how often to retry serial communication before giving up [Optional. Default is 5] """ def __init__(self, **stn_dict): self.model = stn_dict.get('model', 'Ultimeter') self.port = stn_dict.get('port', Station.DEFAULT_PORT) self.max_tries = int(stn_dict.get('max_tries', 5)) self.retry_wait = int(stn_dict.get('retry_wait', 3)) debug_serial = int(stn_dict.get('debug_serial', 0)) self.last_rain = None loginf('driver version is %s' % DRIVER_VERSION) loginf('using serial port %s' % self.port) self.station = Station(self.port, debug_serial=debug_serial) self.station.open() def closePort(self): if self.station is not None: self.station.close() self.station = None @property def hardware_name(self): return self.model def DISABLED_getTime(self): return self.station.get_time() def DISABLED_setTime(self): self.station.set_time(int(time.time())) def genLoopPackets(self): self.station.set_logger_mode() while True: packet = {'dateTime': int(time.time() + 0.5), 'usUnits': weewx.US} readings = self.station.get_readings_with_retry(self.max_tries, self.retry_wait) data = Station.parse_readings(readings) packet.update(data) self._augment_packet(packet) yield packet def _augment_packet(self, packet): packet['rain'] = weewx.wxformulas.calculate_rain( packet['rain_total'], self.last_rain) self.last_rain = packet['rain_total'] class Station(object): DEFAULT_PORT = '/dev/ttyUSB0' def __init__(self, port, debug_serial=0): self._debug_serial = debug_serial self.port = port self.baudrate = 2400 self.timeout = 3 # seconds self.serial_port = None # setting the year works only for models 2004 and later self.can_set_year = True # modem mode is available only on models 2004 and later # not available on pre-2004 models 50/100/500/700/800 self.has_modem_mode = True def __enter__(self): self.open() return self def __exit__(self, _, value, traceback): self.close() def open(self): logdbg("open serial port %s" % self.port) self.serial_port = serial.Serial(self.port, self.baudrate, timeout=self.timeout) def close(self): if self.serial_port is not None: logdbg("close serial port %s" % self.port) self.serial_port.close() self.serial_port = None def get_time(self): try: self.set_logger_mode() buf = self.get_readings_with_retry() data = Station.parse_readings(buf) d = data['day_of_year'] # seems to start at 0 m = data['minute_of_day'] # 0 is midnight before start of day tt = time.localtime() y = tt.tm_year s = tt.tm_sec ts = time.mktime((y, 1, 1, 0, 0, s, 0, 0, -1)) + d * 86400 + m * 60 logdbg("station time: day:%s min:%s (%s)" % (d, m, timestamp_to_string(ts))) return ts except (serial.serialutil.SerialException, weewx.WeeWxIOError) as e: logerr("get_time failed: %s" % e) return int(time.time()) def set_time(self, ts): # go to modem mode so we do not get logger chatter self.set_modem_mode() # set time should work on all models tt = time.localtime(ts) cmd = b">A%04d%04d" % (tt.tm_yday - 1, tt.tm_min + tt.tm_hour * 60) logdbg("set station time to %s (%s)" % (timestamp_to_string(ts), cmd)) self.serial_port.write(b"%s\r" % cmd) # year works only for models 2004 and later if self.can_set_year: cmd = b">U%s" % tt.tm_year logdbg("set station year to %s (%s)" % (tt.tm_year, cmd)) self.serial_port.write(b"%s\r" % cmd) def set_logger_mode(self): # in logger mode, station sends logger mode records continuously if self._debug_serial: logdbg("set station to logger mode") self.serial_port.write(b">I\r") def set_modem_mode(self): # setting to modem mode should stop data logger output if self.has_modem_mode: if self._debug_serial: logdbg("set station to modem mode") self.serial_port.write(b">\r") def get_readings(self): N = self.serial_port.inWaiting() buf = self.serial_port.read(N) if self._debug_serial: logdbg("station said: %s" % _fmt(buf)) return buf def validate_buffer(self, buf): if len(buf) not in [48, 50, 52]: raise weewx.WeeWxIOError("Unexpected buffer length %d" % len(buf)) if buf[0:2] != b'!!': raise weewx.WeeWxIOError("Unexpected header bytes '%s'" % buf[0:2]) return buf def get_readings_with_retry(self, max_tries=5, retry_wait=3): for ntries in range(0, max_tries): try: buf = self.get_readings() self.validate_buffer(buf) return buf except (serial.serialutil.SerialException, weewx.WeeWxIOError) as e: loginf("Failed attempt %d of %d to get readings: %s" % (ntries + 1, max_tries, e)) time.sleep(retry_wait) else: msg = "Max retries (%d) exceeded for readings" % max_tries logerr(msg) raise weewx.RetriesExceeded(msg) @staticmethod def parse_readings(raw): """Ultimeter stations emit data in PeetBros format. Each line has 52 characters - 2 header bytes, 48 data bytes, and a carriage return and line feed (new line): !!000000BE02EB000027700000023A023A0025005800000000\r\n SSSSXXDDTTTTLLLLPPPPttttHHHHhhhhddddmmmmRRRRWWWW SSSS - wind speed (0.1 kph) XX - wind direction calibration DD - wind direction (0-255) TTTT - outdoor temperature (0.1 F) LLLL - long term rain (0.01 in) PPPP - pressure (0.1 mbar) tttt - indoor temperature (0.1 F) HHHH - outdoor humidity (0.1 %) hhhh - indoor humidity (0.1 %) dddd - date (day of year) mmmm - time (minute of day) RRRR - daily rain (0.01 in) WWWW - one minute wind average (0.1 kph) "pressure" reported by the Ultimeter 2000 is correlated to the local official barometer reading as part of the setup of the station console so this value is assigned to the 'barometer' key and the pressure and altimeter values are calculated from it. Some stations may omit daily_rain or wind_average, so check for those. """ buf = raw[2:] data = dict() data['windSpeed'] = Station._decode(buf[0:4], 0.1 * MILE_PER_KM) # mph data['windDir'] = Station._decode(buf[6:8], 1.411764) # compass deg data['outTemp'] = Station._decode(buf[8:12], 0.1, neg=True) # degree_F data['rain_total'] = Station._decode(buf[12:16], 0.01) # inch data['barometer'] = Station._decode(buf[16:20], 0.1 * INHG_PER_MBAR) # inHg data['inTemp'] = Station._decode(buf[20:24], 0.1, neg=True) # degree_F data['outHumidity'] = Station._decode(buf[24:28], 0.1) # percent data['inHumidity'] = Station._decode(buf[28:32], 0.1) # percent data['day_of_year'] = Station._decode(buf[32:36]) data['minute_of_day'] = Station._decode(buf[36:40]) if len(buf) > 40: data['daily_rain'] = Station._decode(buf[40:44], 0.01) # inch if len(buf) > 44: data['wind_average'] = Station._decode(buf[44:48], 0.1 * MILE_PER_KM) # mph return data @staticmethod def _decode(s, multiplier=None, neg=False): """Ultimeter puts hyphens in the string when a sensor is not installed. When we get a hyphen or any other non-hex character, return None. Negative values are represented in twos complement format. Only do the check for negative values if requested, since some parameters use the full set of bits (e.g., wind direction) and some do not (e.g., temperature). """ v = None try: v = int(s, 16) if neg: bits = 4 * len(s) if v & (1 << (bits - 1)) != 0: v -= (1 << bits) if multiplier is not None: v *= multiplier except ValueError as e: if s != b'----': logdbg("decode failed for '%s': %s" % (s, e)) return v class UltimeterConfEditor(weewx.drivers.AbstractConfEditor): @property def default_stanza(self): return """ [Ultimeter] # This section is for the PeetBros Ultimeter series of weather stations. # Serial port such as /dev/ttyS0, /dev/ttyUSB0, or /dev/cua0 port = %s # The station model, e.g., Ultimeter 2000, Ultimeter 100 model = Ultimeter # The driver to use: driver = weewx.drivers.ultimeter """ % Station.DEFAULT_PORT def prompt_for_settings(self): print("Specify the serial port on which the station is connected, for") print("example: /dev/ttyUSB0 or /dev/ttyS0 or /dev/cua0.") port = self._prompt('port', Station.DEFAULT_PORT) return {'port': port} # define a main entry point for basic testing of the station without weewx # engine and service overhead. invoke this as follows from the weewx root dir: # # PYTHONPATH=bin python bin/weewx/drivers/ultimeter.py if __name__ == '__main__': import optparse usage = """%prog [options] [--help]""" syslog.openlog('ultimeter', syslog.LOG_PID | syslog.LOG_CONS) syslog.setlogmask(syslog.LOG_UPTO(syslog.LOG_DEBUG)) 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='provide additional debug output in log') parser.add_option('--port', dest='port', metavar='PORT', help='serial port to which the station is connected', default=Station.DEFAULT_PORT) (options, args) = parser.parse_args() if options.version: print("ultimeter driver version %s" % DRIVER_VERSION) exit(0) with Station(options.port, debug_serial=options.debug) as station: station.set_logger_mode() while True: print(time.time(), _fmt(station.get_readings()))
