diff --git a/cfg/fi_cfg.py b/cfg/fi_cfg.py
index 557bad5..b3db650 100644
--- a/cfg/fi_cfg.py
+++ b/cfg/fi_cfg.py
@@ -3,30 +3,10 @@ Node('fi.psi.ch',
      'tcp://5000',
      )
 
-Mod('htr_io',
-    'frappy_psi.tdkpower.IO',
-    'powersupply communicator',
-    uri='serial:///dev/ttyUSB0?baudrate=9600',
-    )
-
-Mod('htr_power',
-    'frappy_psi.tdkpower.Power',
-    'heater power',
-    io='htr_io',
-    )
-
-Mod('htr',
-    'frappy_psi.furnace.TdkOutput',
-    'heater output',
-    io='htr_io',
-    maxvolt=8,
-    maxcurrent=200,
-    )
-
 Mod('T_main',
     'frappy_psi.ionopimax.CurrentInput',
     'sample temperature',
-    addr='ai4',
+    addr='ai1',
     valuerange=(0, 1372),
     value=Param(unit='degC'),
     )
@@ -34,7 +14,7 @@ Mod('T_main',
 Mod('T_extra',
     'frappy_psi.ionopimax.CurrentInput',
     'extra temperature',
-    addr='ai3',
+    addr='ai2',
     valuerange=(0, 1372),
     value=Param(unit='degC'),
     )
@@ -58,6 +38,33 @@ Mod('T',
     i=0.01,
     )
 
+Mod('htr_io',
+    'frappy_psi.tdkpower.IO',
+    'powersupply communicator',
+    uri='serial:///dev/ttyUSB0?baudrate=9600',
+    )
+
+Mod('htr_power',
+    'frappy_psi.tdkpower.Power',
+    'heater power',
+    io='htr_io',
+    )
+
+Mod('htr',
+    'frappy_psi.furnace.TdkOutput',
+    'heater output',
+    io='htr_io',
+    maxvolt=8,
+    maxcurrent=200,
+    )
+
+Mod('flowswitch',
+    'frappy_psi.ionopimax.DigitalInput',
+    'flow switch',
+    addr='dt2',
+    true_level='low',
+    )
+
 # Mod('interlocks',
 #     'frappy_psi.furnace.Interlocks',
 #     'interlock parameters',
@@ -69,24 +76,18 @@ Mod('T',
 #     vacuum_limit=0.1,
 #     )
 
-# Mod('p',
-#     'frappy_psi.ionopimax.VoltageInput',
-#     'pressure',
-#     addr='av?',
-#     rawrange=(0, 1.5),
-#     valuerange=(0, 150),
-#     value=Param(unit='degC'),
-#     )
+Mod('p',
+    'frappy_psi.ionopimax.LogVoltageInput',
+    'pressure reading',
+    addr = 'av1',
+    rawrange = (1.82, 8.6),
+    valuerange = (5e-9, 1000),
+    value = Param(unit='mbar'),
+   )
 
-
-# Mod('p_io',
-#     'frappy_psi.pfeiffer.IO',
-#     'pressure io',
-#     uri='serial:///dev/ttyUSBlower',
-#     )
-#
-# Mod('p',
-#     'frappy_psi.pfeiffer.Pressure',
-#     'pressure reading',
-#     io='p_io',
-#     )
+Mod('vso',
+    'frappy_psi.ionopimax.VoltagePower',
+    'voltage power output',
+    target = 24,
+    export = False,
+   )
diff --git a/frappy_psi/ionopimax.py b/frappy_psi/ionopimax.py
index 7bcf443..221c848 100644
--- a/frappy_psi/ionopimax.py
+++ b/frappy_psi/ionopimax.py
@@ -21,7 +21,7 @@
 import os
 from glob import glob
 from frappy.core import Readable, Writable, Parameter, BoolType, StringType,\
-    FloatRange, Property, TupleOf, ERROR, IDLE
+    EnumType, FloatRange, Property, TupleOf, ERROR, IDLE
 from frappy.errors import ConfigError, OutOfRangeError
 from math import log
 
@@ -41,7 +41,7 @@ class Base:
         for basepath in basepaths:
             for devclass in ([self.devclass] if isinstance(self.devclass, str) else self.devclass):
                 devpath = f'{basepath}/{devclass}'
-                if os.path.exists(devpath):
+                if os.path.exists(f'{devpath}/{self.addr}'):
                     self._devpath = devpath
                     return
                 else:
@@ -64,10 +64,17 @@ class Base:
 
 class DigitalInput(Base, Readable):
     value = Parameter('input state', BoolType())
-    devclass = 'digital_in'
+    true_level = Property('level representig True', EnumType(low=0, high=1), default=1)
+    devclass = 'digital_in', 'digital_io'
+
+    def initModule(self):
+        super().initModule()
+        self.log.info('devpath %r', self._devpath)
+        if self.addr.startswith('dt'):
+            self.write(f'{self.addr}_mode','inp')
 
     def read_value(self):
-        return self.read(self.addr, 1)
+        return self.read(self.addr, 1) == self.true_level
 
 
 class DigitalOutput(DigitalInput, Writable):
@@ -75,7 +82,7 @@ class DigitalOutput(DigitalInput, Writable):
     devclass = 'digital_out', 'relay'
 
     def write_target(self, value):
-        self.write(self.addr, value, 1)
+        self.write(self.addr, value == self.true_level, 1)
 
 
 class AnalogInput(Base, Readable):