merged changes for lakeshore and ccu4

cfg/ls340_cfg.py

@@ -4,33 +4,22 @@ Node('ls340test.psi.ch',
      )
 
 Mod('io',
-    'frappy_psi.lakeshore.Ls340IO',
+    'frappy_psi.lakeshore.IO340',
     'communication to ls340',
-    uri='tcp://ldmprep56-ts:3002'
+    uri='tcp://localhost:7777'
     )
 
+Mod('dev',
+    'frappy_psi.lakeshore.Device340',
+    'device for calcurve',
+    io='io',
+    curve_handling=True,
+    )
 Mod('T',
-    'frappy_psi.lakeshore.TemperatureLoop340',
-    'sample temperature',
-    output_module='Heater',
-    target=Param(max=470),
-    io='io',
-    channel='B'
-    )
-
-Mod('T_cold_finger',
     'frappy_psi.lakeshore.Sensor340',
-    'cold finger temperature',
+    'sample temperature',
-    io='io',
+    # output_module='Heater',
-    channel='A'
+    device='dev',
-    )
+    channel='A',
-
+    calcurve='x29746',
-Mod('Heater',
-    'frappy_psi.lakeshore.HeaterOutput',
-    'heater output',
-    channel='B',
-    io='io',
-    resistance=25,
-    max_power=50,
-    current=1
     )

cfg/main/ori7test_cfg.py

@@ -0,0 +1,17 @@
+from frappy_psi.ccracks import Rack
+
+Node('ori7test.psi.ch',
+     'ORI7 test',
+     'tcp://5000'
+     )
+
+rack = Rack(Mod)
+
+with rack.lakeshore() as ls:
+    ls.sensor('Ts', channel='C', calcurve='x186350')
+    ls.loop('T', channel='B', calcurve='x174786')
+    ls.heater('htr', '100W', 100)
+
+rack.ccu(he=True, n2=True)
+
+rack.hepump()

frappy/lib/units.py

@@ -0,0 +1,50 @@
+# *****************************************************************************
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#   Markus Zolliker <markus.zolliker@psi.ch>
+#
+# *****************************************************************************
+"""handling of prefixes of physical units"""
+
+import re
+import prefixed
+
+prefixed.SI_MAGNITUDE['u'] = 1e-6  # accept 'u' as replacement for 'µ'
+
+
+class NumberWithUnit:
+    def __init__(self, *units):
+        pfx = "|".join(prefixed.SI_MAGNITUDE)
+        unt = "|".join(units)
+        self.units = units
+        self.pattern = re.compile(rf'\s*([+-]?\d*\.?\d*(?:[eE][+-]?\d+)?\s*(?:{pfx})?)({unt})\s*$')
+
+    def parse(self, value):
+        """parse and return number and value"""
+        match = self.pattern.match(value)
+        if not match:
+            raise ValueError(f'{value!r} can not be interpreted as a number with unit {",".join(self.units)}')
+        number, unit = match.groups()
+        return prefixed.Float(number), unit
+
+    def getnum(self, value):
+        """parse and return value only"""
+        return self.parse(value)[0]
+
+
+def format_with_unit(value, unit='', digits=3):
+    return f'{prefixed.Float(value):.{digits}H}{unit}'

frappy_psi/calcurve.py

@@ -22,6 +22,7 @@
 
 import os
 import re
+from pathlib import Path
 from os.path import basename, dirname, exists, join
 
 import numpy as np
@@ -31,13 +32,22 @@ from scipy.interpolate import PchipInterpolator, CubicSpline, PPoly  # pylint: d
 from frappy.errors import ProgrammingError, RangeError
 from frappy.lib import clamp
 
+
+def identity(x):
+    return x
+
+
+def exp10(x):
+    return 10 ** np.array(x)
+
+
 to_scale = {
-    'lin': lambda x: x,
+    'lin': identity,
-    'log': lambda x: np.log10(x),
+    'log': np.log10,
 }
 from_scale = {
-    'lin': lambda x: x,
+    'lin': identity,
-    'log': lambda x: 10 ** np.array(x),
+    'log': exp10,
 }
 TYPES = [  # lakeshore type, inp-type, loglog
     ('DT', 'si', False),  # Si diode
@@ -55,7 +65,7 @@ TYPES = [  # lakeshore type, inp-type, loglog
 
 OPTION_TYPE = {
     'loglog': 0,  # boolean
-    'extrange': 2,  # tuple(min T, max T for extrapolation
+    'extrange': 2,  # tuple(min T, max T) for extrapolation
     'calibrange': 2,  # tuple(min T, max T)
 }
 
@@ -222,14 +232,6 @@ PARSERS = {
 }
 
 
-def check(x, y, islog):
-    # check interpolation error
-    yi = y[:-2] + (x[1:-1] - x[:-2]) * (y[2:] - y[:-2]) / (x[2:] - x[:-2])
-    if islog:
-        return sum((yi - y[1:-1]) ** 2)
-    return sum((np.log10(yi) - np.log10(y[1:-1])) ** 2)
-
-
 def get_curve(newscale, curves):
     """get curve from curve cache (converts not existing ones)
 
@@ -247,6 +249,7 @@ def get_curve(newscale, curves):
 class CalCurve(HasOptions):
     EXTRAPOLATION_AMOUNT = 0.1
     MAX_EXTRAPOLATION_FACTOR = 2
+    filename = None  # calibration file
 
     def __init__(self, calibspec=None, *, x=None, y=None, cubic_spline=True, **options):
         """calibration curve
@@ -257,7 +260,7 @@ class CalCurve(HasOptions):
             [<full path> | <name>][,<key>=<value> ...]
             for <key>/<value> as in parser arguments
         :param x, y:  x and y arrays (given instead of calibspec)
-        :param cubic_split: set to False for always using Pchip interpolation
+        :param cubic_spline: set to False for always using Pchip interpolation
         :param options: options for parsers
         """
         self.options = options
@@ -265,26 +268,31 @@ class CalCurve(HasOptions):
             parser = StdParser()
             parser.xdata = x
             parser.ydata = y
+            self.calibname = 'custom'
         else:
             if x or y:
                 raise ProgrammingError('can not give both calibspec and x,y ')
             sensopt = calibspec.split(',')
             calibname = sensopt.pop(0)
-            _, dot, ext = basename(calibname).rpartition('.')
+            self.calibname = basename(calibname)
+            head, dot, ext = self.calibname.rpartition('.')
+            if dot:
+                self.calibname = head
             kind = None
-            pathlist = os.environ.get('FRAPPY_CALIB_PATH', '').split(':')
+            pathlist = [Path(p.strip()) for p in os.environ.get('FRAPPY_CALIB_PATH', '').split(':')]
-            pathlist.append(join(dirname(__file__), 'calcurves'))
+            pathlist.append(Path(dirname(__file__)) / 'calcurves')
             for path in pathlist:
                 # first try without adding kind
-                filename = join(path.strip(), calibname)
+                filename = path / calibname
-                if exists(filename):
+                if filename.exists():
                     kind = ext if dot else None
                     break
                 # then try adding all kinds as extension
                 for nam in calibname, calibname.upper(), calibname.lower():
                     for kind in PARSERS:
-                        filename = join(path.strip(), '%s.%s' % (nam, kind))
+                        filename = path / f'{nam}.{kind}'
                         if exists(filename):
+                            self.filename = filename
                             break
                     else:
                         continue
@@ -328,6 +336,7 @@ class CalCurve(HasOptions):
         not_incr_idx = np.argwhere(x[1:] <= x[:-1])
         if len(not_incr_idx):
             raise RangeError('x not monotonic at x=%.4g' % x[not_incr_idx[0]])
+        self.ptc = y[-1] > y[0]
 
         self.x = {parser.xscale: x}
         self.y = {parser.yscale: y}
@@ -344,8 +353,7 @@ class CalCurve(HasOptions):
         self.convert_x = to_scale[newscale]
         self.convert_y = from_scale[newscale]
         self.calibrange = self.options.get('calibrange')
-        dirty = set()
+        self.extra_points = (0, 0)
-        self.extra_points = False
         self.cutted = False
         if self.calibrange:
             self.calibrange = sorted(self.calibrange)
@@ -371,7 +379,6 @@ class CalCurve(HasOptions):
                 self.y = {newscale: y}
                 ibeg = 0
                 iend = len(x)
-                dirty.add('xy')
             else:
                 self.extra_points = ibeg, len(x) - iend
         else:
@@ -493,13 +500,48 @@ class CalCurve(HasOptions):
         except IndexError:
             return defaultx
 
-    def export(self, logformat=False, nmax=199, yrange=None, extrapolate=True, xlimits=None):
+    def interpolation_error(self, x0, x1, y0, y1, funx, funy, relerror, return_tuple=False):
+        """calcualte interpoaltion error
+
+        :param x0: start of interval
+        :param x1: end of interval
+        :param y0: y at start of interval
+        :param y1: y at end of interval
+        :param funx: function to convert x from exported scale to internal scale
+        :param funy: function to convert y from internal scale to exported scale
+        :param relerror: True when the exported y scale is linear
+        :param return_tuple: True: return interpolation error as a tuple with two values
+           (without and with 3 additional points)
+           False: return one value without additional points
+        :return: relative deviation
+        """
+        xspace = np.linspace(x0, x1, 9)
+        x = funx(xspace)
+        yr = self.spline(x)
+        yspline = funy(yr)
+        yinterp = y0 + np.linspace(0.0, y1 - y0, 9)
+        # difference between spline (at m points) and liner interpolation
+        diff = np.abs(yspline - yinterp)
+        # estimate of interpolation error with 4 sections:
+        # difference between spline (at m points) and linear interpolation between neighboring points
+
+        if relerror:
+            fact = 2 / (np.abs(y0) + np.abs(y1))   # division by zero can not happen, as y0 and y1 can not both be zero
+        else:
+            fact = 2.3  # difference is in log10 -> multiply by 1 / log10(e)
+        result = np.max(diff, axis=0) * fact
+        if return_tuple:
+            diff2 = np.abs(0.5 * (yspline[:-2:2] + yspline[2::2]) - funy(yr[1:-1:2]))
+            return result, np.max(diff2, axis=0) * fact
+        return result
+
+    def export(self, logformat=False, nmax=199, yrange=None, extrapolate=True, xlimits=None, nmin=199):
         """export curve for downloading to hardware
 
         :param nmax: max number of points. if the number of given points is bigger,
                      the points with the lowest interpolation error are omitted
-        :param logformat: a list with two elements of None, True or False
+        :param logformat: a list with two elements of None, True or False for x and y
-                          True: use log, False: use line, None: use log if self.loglog
+                          True: use log, False: use lin, None: use log if self.loglog
                           values None are replaced with the effectively used format
                           False / True are replaced by [False, False] / [True, True]
                           default is False
@@ -507,25 +549,26 @@ class CalCurve(HasOptions):
         :param extrapolate: a flag indicating whether the curves should be extrapolated
                             to the preset extrapolation range
         :param xlimits: max x range
+        :param nmin: minimum number of points
         :return: numpy array with 2 dimensions returning the curve
         """
 
         if logformat in (True, False):
-            logformat = [logformat, logformat]
+            logformat = (logformat, logformat)
+        self.logformat = list(logformat)
         try:
             scales = []
             for idx, logfmt in enumerate(logformat):
                 if logfmt and self.lin_forced[idx]:
                     raise ValueError('%s must contain positive values only' % 'xy'[idx])
-                logformat[idx] = linlog = self.loglog if logfmt is None else logfmt
+                self.logformat[idx] = linlog = self.loglog if logfmt is None else logfmt
                 scales.append('log' if linlog else 'lin')
             xscale, yscale = scales
         except (TypeError, AssertionError):
-            raise ValueError('logformat must be a 2 element list or a boolean')
+            raise ValueError('logformat must be a 2 element sequence or a boolean')
 
-        x = self.spline.x[1:-1]  # raw units, excluding extrapolated points
+        xr = self.spline.x[1:-1]  # raw units, excluding extrapolated points
-        x1, x2 = xmin, xmax = x[0], x[-1]
+        x1, x2 = xmin, xmax = xr[0], xr[-1]
-        y1, y2 = sorted(self.spline([x1, x2]))
 
         if extrapolate and not yrange:
             yrange = self.exty
@@ -535,42 +578,100 @@ class CalCurve(HasOptions):
             lim = to_scale[self.scale](xlimits)
             xmin = clamp(xmin, *lim)
             xmax = clamp(xmax, *lim)
+        # start and end index of calibrated range
+        ibeg, iend = self.extra_points[0], len(xr) - self.extra_points[1]
         if xmin != x1 or xmax != x2:
-            ibeg, iend = np.searchsorted(x, (xmin, xmax))
+            i, j = np.searchsorted(xr, (xmin, xmax))
-            if abs(x[ibeg] - xmin) < 0.1 * (x[ibeg + 1] - x[ibeg]):
+            if abs(xr[i] - xmin) < 0.1 * (xr[i + 1] - xr[i]):
                 # remove first point, if close
-                ibeg += 1
+                i += 1
-            if abs(x[iend - 1] - xmax) < 0.1 * (x[iend - 1] - x[iend - 2]):
+            if abs(xr[j - 1] - xmax) < 0.1 * (xr[j - 1] - xr[j - 2]):
                 # remove last point, if close
-                iend -= 1
+                j -= 1
-            x = np.concatenate(([xmin], x[ibeg:iend], [xmax]))
+            offset = i - 1
-        y = self.spline(x)
+            xr = np.concatenate(([xmin], xr[i:j], [xmax]))
+            ibeg = max(0, ibeg - offset)
+            iend = min(len(xr), iend - offset)
+
+        yr = self.spline(xr)
 
         # convert to exported scale
-        if xscale != self.scale:
+        if xscale == self.scale:
-            x = to_scale[xscale](from_scale[self.scale](x))
+            xbwd = identity
-        if yscale != self.scale:
+            x = xr
-            y = to_scale[yscale](from_scale[self.scale](y))
+        else:
+            if self.scale == 'log':
+                xfwd, xbwd = from_scale[self.scale], to_scale[self.scale]
+            else:
+                xfwd, xbwd = to_scale[xscale], from_scale[xscale]
+            x = xfwd(xr)
+        if yscale == self.scale:
+            yfwd = identity
+            y = yr
+        else:
+            if self.scale == 'log':
+                yfwd = from_scale[self.scale]
+            else:
+                yfwd = to_scale[yscale]
+            y = yfwd(yr)
 
-        # reduce number of points, if needed
+        self.deviation = None
+        nmin = min(nmin, nmax)
         n = len(x)
+        relerror = yscale == 'lin'
+        if len(x) > nmax:
+            # reduce number of points, if needed
             i, j = 1, n - 1  # index range for calculating interpolation deviation
             deviation = np.zeros(n)
             while True:
+                deviation[i:j] = self.interpolation_error(
+                    x[i-1:j-1], x[i+1:j+1], y[i-1:j-1], y[i+1:j+1],
+                    xbwd, yfwd, relerror)
                 # calculate interpolation error when a single point is omitted
-            ym = y[i-1:j-1] + (x[i:j] - x[i-1:j-1]) * (y[i+1:j+1] - y[i-1:j-1]) / (x[i+1:j+1] - x[i-1:j-1])
-            if yscale == 'log':
-                deviation[i:j] = np.abs(ym - y[i:j])
-            else:
-                deviation[i:j] = np.abs(ym - y[i:j]) / (np.abs(ym + y[i:j]) + 1e-10)
                 if n <= nmax:
                     break
                 idx = np.argmin(deviation[1:-1]) + 1  # find index of the smallest error
                 y = np.delete(y, idx)
                 x = np.delete(x, idx)
                 deviation = np.delete(deviation, idx)
-            n -= 1
+                n = len(x)
                 # index range to recalculate
                 i, j = max(1, idx - 1), min(n - 1, idx + 1)
             self.deviation = deviation  # for debugging purposes
+        elif n < nmin:
+            if ibeg + 1 < iend:
+                diff1, diff4 = self.interpolation_error(
+                    x[ibeg:iend - 1], x[ibeg + 1:iend], y[ibeg:iend - 1], y[ibeg + 1:iend],
+                    xbwd, yfwd, relerror, return_tuple=True)
+                dif_target = 1e-4
+                sq4 = np.sqrt(diff4) * 4
+                sq1 = np.sqrt(diff1)
+                offset = 0.49
+                n_mid = nmax - len(x) + iend - ibeg - 1
+                # iteration to find a dif target resulting in no more than nmax points
+                while True:
+                    scale = 1 / np.sqrt(dif_target)
+                    # estimate number of intermediate points (float!) needed to reach dif_target
+                    # number of points estimated from the result of the interpolation error with 4 sections
+                    n4 = np.maximum(1, sq4 * scale)
+                    # number of points estimated from the result of the interpolation error with 1 section
+                    n1 = np.maximum(1, sq1 * scale)
+                    # use n4 where n4 > 4, n1, where n1 < 1 and a weighted average in between
+                    nn = np.select([n4 > 4, n1 > 1],
+                                   [n4, (n4 * (n1 - 1) + n1 * (4 - n4)) / (3 + n1 - n4)], n1)
+                    n_tot = np.sum(np.rint(nn + offset))
+                    extra = n_tot - n_mid
+                    if extra <= 0:
+                        break
+                    dif_target *= (n_tot / n_mid) ** 2
+
+                xnew = [x[:ibeg]]
+                for x0, x1, ni in zip(x[ibeg:iend-1], x[ibeg+1:iend], np.rint(nn + offset)):
+                    xnew.append(np.linspace(x0, x1, int(ni) + 1)[:-1])
+                xnew.append(x[iend-1:])
+                x = np.concatenate(xnew)
+                y = yfwd(self.spline(xbwd(x)))
+                # for debugging purposes:
+                self.deviation = self.interpolation_error(x[:-1], x[1:], y[:-1], y[1:], xbwd, yfwd, relerror)
+
         return np.stack([x, y], axis=1)

frappy_psi/ccracks.py

@@ -0,0 +1,125 @@
+import os
+from configparser import ConfigParser
+
+
+class Lsc:
+    def __init__(self, modfactory, ls_uri, ls_ioname='lsio', ls_devname='ls', ls_model='336', **kwds):
+        self.modfactory = Mod = modfactory
+        self.model = ls_model
+        self.ioname = ls_ioname
+        self.devname = ls_devname
+        self.io = Mod(self.ioname, cls=f'frappy_psi.lakeshore.IO{self.model}',
+                      description='comm. to lakeshore in cc rack',
+                      uri=ls_uri)
+        self.dev = Mod(self.devname, cls=f'frappy_psi.lakeshore.Device{self.model}',
+                       description='lakeshore in cc rack', io=self.ioname, curve_handling=True)
+        self.loops = {}
+        self.outputs = {}
+
+    def sensor(self, name, channel, calcurve, **kwds):
+        Mod = self.modfactory
+        kwds.setdefault('cls', f'frappy_psi.lakeshore.Sensor{self.model}')
+        kwds.setdefault('description', f'T sensor {name}')
+        return Mod(name, channel=channel, calcurve=calcurve,
+                   io=self.ioname, device=self.devname, **kwds)
+
+    def loop(self, name, channel, calcurve, **kwds):
+        Mod = self.modfactory
+        kwds.setdefault('cls', f'frappy_psi.lakeshore.Loop{self.model}')
+        kwds.setdefault('description', f'T loop {name}')
+        mod = Mod(name, channel=channel, calcurve=calcurve,
+                  io=self.ioname, device=self.devname, **kwds)
+        self.loops[name] = mod
+        return mod
+
+    def heater(self, name, max_heater, resistance, output_no=1, **kwds):
+        Mod = self.modfactory
+        if output_no == 1:
+            kwds.setdefault('cls', f'frappy_psi.lakeshore.MainOutput{self.model}')
+        elif output_no == 2:
+            kwds.setdefault('cls', f'frappy_psi.lakeshore.SecondaryOutput{self.model}')
+        else:
+            return
+        kwds.setdefault('description', '')
+        mod = Mod(name, max_heater=max_heater, resistance=resistance,
+                  io=self.ioname, device=self.devname, **kwds)
+        self.outputs[name] = mod
+        return mod
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        outmodules = dict(self.outputs)
+        for name, loop in self.loops.items():
+            outname = loop.get('output_module')
+            if outname:
+                out = outmodules.pop(outname, None)
+                if not out:
+                    raise KeyError(f'{outname} is not a output module in this lakeshore')
+            else:
+                if not outmodules:
+                    raise KeyError(f'{name} needs an output module on this lakeshore')
+                outname = list(outmodules)[0]
+                out = outmodules.pop(outname)
+                loop['output_module'] = outname
+                if not out['description']:
+                    out['description'] = f'heater for {outname}'
+
+
+class CCU:
+    def __init__(self, Mod, ccu_uri, ccu_ioname='ccuio', ccu_devname='ccu', he=None, n2=None, **kwds):
+        self.ioname = ccu_ioname
+        self.devname = ccu_devname
+        Mod(self.ioname, 'frappy_psi.ccu4.CCU4IO',
+            'comm. to CCU4', uri=ccu_uri)
+        if he:
+            if not isinstance(he, str):  # e.g. True
+                he = 'He_lev'
+            Mod(he, cls='frappy_psi.ccu4.HeLevel',
+                description='the He Level', io=self.ioname)
+        if n2:
+            if isinstance(n2, str):
+                n2 = n2.split(',')
+            else:  # e.g. True
+                n2 = []
+            n2, valve, upper, lower = n2 + ['N2_lev', 'N2_valve', 'N2_upper', 'N2_lower'][len(n2):]
+            print(n2, valve, upper, lower)
+            Mod(n2, cls='frappy_psi.ccu4.N2Level',
+                description='the N2 Level', io=self.ioname,
+                valve=valve, upper=upper, lower=lower)
+            Mod(valve, cls='frappy_psi.ccu4.N2FillValve',
+                description='LN2 fill valve', io=self.ioname)
+            Mod(upper, cls='frappy_psi.ccu4.N2TempSensor',
+                description='upper LN2 sensor')
+            Mod(lower, cls='frappy_psi.ccu4.N2TempSensor',
+                description='lower LN2 sensor')
+
+
+class HePump:
+    def __init__(self, Mod, hepump_uri, hepump_io='hepump_io', hemotname='hepump_mot', **kwds):
+        Mod(hepump_io, 'frappy_psi.trinamic.BytesIO', 'He pump connection', uri=hepump_uri)
+        Mod(hemotname, 'frappy_psi.trinamic.Motor', 'He pump valve motor', io=hepump_io)
+
+
+class Rack:
+    rackfile = '/home/l_samenv/.config/racks.ini'
+
+    def __init__(self, modfactory, **kwds):
+        self.modfactory = modfactory
+        parser = ConfigParser()
+        parser.optionxform = str
+        parser.read([self.rackfile])
+        kwds.update(parser.items(os.environ['Instrument']))
+        self.kwds = kwds
+
+    def lakeshore(self):
+        return Lsc(self.modfactory, **self.kwds)
+
+    def ccu(self, **kwds):
+        kwds.update(self.kwds)
+        return CCU(self.modfactory, **kwds)
+
+    def hepump(self):
+        return HePump(self.modfactory, **self.kwds)
+

frappy_psi/ccu4.py

@@ -28,7 +28,6 @@ from frappy.core import HasIO, Parameter, Command, Readable, Writable, Drivable,
     Property, StringIO, BUSY, IDLE, WARN, ERROR, DISABLED, Attached
 from frappy.datatypes import BoolType, EnumType, FloatRange, StructOf, \
     StatusType, IntRange, StringType, TupleOf
-from frappy.dynamic import Pinata
 from frappy.errors import CommunicationFailedError
 from frappy.states import HasStates, status_code, Retry
 
@@ -42,7 +41,7 @@ class CCU4IO(StringIO):
     # for completeness: (not needed, as it is the default)
     end_of_line = '\n'
     # on connect, we send 'cid' and expect a reply starting with 'CCU4'
-    identification = [('cid', r'CCU4.*')]
+    identification = [('cid', r'cid=CCU4.*')]
 
 
 class CCU4Base(HasIO):
@@ -144,7 +143,7 @@ class Valve(CCU4Base, Writable):
             self.command(**self._close_command)
 
     def read_status(self):
-        state = self.command(self._query_state)
+        state = int(self.command(**self._query_state))
         self.value, status = self.STATE_MAP[state]
         return status
 
@@ -174,14 +173,14 @@ class N2TempSensor(Readable):
     value = Parameter('LN2 T sensor', FloatRange(unit='K'), default=0)
 
 
-class N2Level(CCU4Base, Pinata, Readable):
+class N2Level(CCU4Base, Readable):
     valve = Attached(Writable, mandatory=False)
     lower = Attached(Readable, mandatory=False)
     upper = Attached(Readable, mandatory=False)
 
     value = Parameter('vessel state', EnumType(empty=0, ok=1, full=2))
-    status = Parameter(datatype=StatusType(Readable, 'BUSY'))
+    status = Parameter(datatype=StatusType(Readable, 'DISABLED', 'BUSY'))
-    mode = Parameter('auto mode', EnumType(A), readonly=False)
+    mode = Parameter('auto mode', EnumType(A), readonly=False, default=A.manual)
 
     threshold = Parameter('threshold triggering start/stop filling',
                           FloatRange(unit='K'), readonly=False)
@@ -206,15 +205,6 @@ class N2Level(CCU4Base, Pinata, Readable):
         5: (WARN, 'empty'),
     }
 
-    def scanModules(self):
-        for modname, name in self.names.items():
-            if name:
-                sensor_name = name.replace('$', self.name)
-                self.setProperty(modname, sensor_name)
-                yield sensor_name, {
-                    'cls': N2FillValve if modname == 'valve' else N2TempSensor,
-                    'description': f'LN2 {modname} T sensor'}
-
     def initialReads(self):
         self.command(nav=1)  # tell CCU4 to activate LN2 sensor readings
         super().initialReads()
@@ -280,17 +270,19 @@ class N2Level(CCU4Base, Pinata, Readable):
 
     @Command()
     def fill(self):
+        """start filling"""
         self.mode = A.auto
-        self.io.write(nc=1)
+        self.command(nc=1)
 
     @Command()
     def stop(self):
+        """stop filling"""
         if self.mode == A.auto:
             # set to watching
             self.command(nc=3)
         else:
             # set to off
-            self.io.write(nc=0)
+            self.command(nc=0)
 
 
 class FlowPressure(CCU4Base, Readable):