flowsas project as of 2025-04-14

cfg/flowsas_cfg.py

@@ -1,6 +1,6 @@
 Node('flowsas.psi.ch',
      'flowsas test motors',
-     'tcp://5000',
+     'tcp://3000',
 )
 
 #Mod('mot_io',
@@ -14,7 +14,7 @@ Node('flowsas.psi.ch',
 #    'horizontal axis',
 #    axis = 'X',
 #    io = 'mot_io',
-#    encoder_mode= 'NO',
+#    encoder_mode = 'NO',
 #   )
 
 #Mod('vmot',
@@ -28,7 +28,7 @@ Node('flowsas.psi.ch',
 Mod('syr_io',
    'frappy_psi.cetoni_pump.LabCannBus',
    'Module for bus',
-    deviceconfig = "/home/l_samenv/frappy/cetoniSDK/CETONI_SDK_Raspi_64bit_v20220627/config/dual_pumps",
+    deviceconfig = "/home/l_samenv/frappy/cetoniSDK/CETONI_SDK_Raspi_64bit_v20220627/config/conti_flow",
   )
 
 Mod('syr1',
@@ -37,7 +37,7 @@ Mod('syr1',
     io='syr_io',
     pump_name = "Nemesys_S_1_Pump",
     valve_name = "Nemesys_S_1_Valve",
-    inner_diameter_set = 10,
+    inner_diameter_set = 14.5673,
     piston_stroke_set = 60,
   )
 
@@ -47,6 +47,14 @@ Mod('syr2',
     io='syr_io',
     pump_name = "Nemesys_S_2_Pump",
     valve_name = "Nemesys_S_2_Valve",
-    inner_diameter_set = 1,
+    inner_diameter_set = 14.5673,
     piston_stroke_set = 60,
   )
+
+Mod('contiflow',
+   'frappy_psi.cetoni_pump.ContiFlowPump',
+   'Continuous flow pump',
+    io='syr_io',
+    inner_diameter_set = 14.5673,
+    piston_stroke_set = 60,
+  )

cfg/peristaltic_pump_cfg.py

@@ -0,0 +1,12 @@
+Node('flowsas.psi.ch',
+     'peristaltic pump',
+     'tcp://3000',
+)
+
+Mod('peripump',
+    'frappy_psi.gilsonpump.PeristalticPump',
+    'Peristaltic pump',
+    addr_AO = 'ao1',
+    addr_dir_relay = 'o1',
+    addr_run_relay = 'o2',
+)

cfg/pressureTest_cfg.py

@@ -0,0 +1,13 @@
+Node('vf.psi.ch',
+     'small vacuum furnace',
+     'tcp://5000',
+)
+
+Mod('p',
+    'frappy_psi.ionopimax.VoltageInput',
+    'Vacuum pressure',
+    addr = 'av2',
+    rawrange = (0, 10),
+    valuerange = (0, 10),
+    value = Param(unit='V'),
+   )

cfg/rheotrigger_cfg.py

@@ -0,0 +1,11 @@
+Node('flowsas.psi.ch',
+     'rheometer triggering',
+     'tcp://3000',
+)
+
+Mod('rheo',
+   'frappy_psi.rheo_trigger.RheoTrigger',
+   'Trigger for the rheometer',
+    addr='dt1',
+    doBeep = False,
+  )

frappy_psi/cetoni_pump.py

@@ -4,13 +4,15 @@ if libpath not in sys.path:
     sys.path.append(libpath)
 
 from frappy.core import Drivable, Readable, StringIO, HasIO, FloatRange, IntRange, StringType, BoolType, EnumType, \
-    Parameter, Property, PersistentParam, Command, IDLE, BUSY, ERROR, Attached
+    Parameter, Property, PersistentParam, Command, IDLE, BUSY, ERROR, WARN, Attached, Module
 from qmixsdk import qmixbus
 from qmixsdk import qmixpump
 from qmixsdk import qmixvalve
+from qmixsdk.qmixpump import ContiFlowProperty, ContiFlowSwitchingMode
 from qmixsdk.qmixbus import UnitPrefix, TimeUnit
+import time
 
-class LabCannBus(Readable):
+class LabCannBus(Module):
     deviceconfig = Property('config files', StringType(),default="/home/l_samenv/frappy/cetoniSDK/CETONI_SDK_Raspi_64bit_v20220627/config/dual_pumps")
 
     def earlyInit(self):
@@ -22,11 +24,15 @@ class LabCannBus(Readable):
         super().initModule()
         self.bus.start()
 
+        with open('/sys/class/ionopimax/buzzer/beep', 'w') as f :
+            f.write('200 50 3')
+
     def shutdownModule(self):
-        """Not so gracefully close the connection"""
+        """Close the connection"""
         self.bus.stop()
         self.bus.close()
 
+
 class SyringePump(Drivable):
     io = Attached()
     pump_name = Property('name of pump', StringType(),default="Nemesys_S_1_Pump")
@@ -35,18 +41,26 @@ class SyringePump(Drivable):
     inner_diameter_set = Property('inner diameter', FloatRange(), default=1)
     piston_stroke_set = Property('piston stroke', FloatRange(), default=60)
     
-    value = PersistentParam('volume', FloatRange(unit='mL'))
+    value = Parameter('volume', FloatRange(unit='uL'))
-    status = PersistentParam()
+    status = Parameter()
+
+    max_flow_rate = Parameter('max flow rate', FloatRange(0,100000, unit='uL/s',), readonly=True)
+    max_volume = Parameter('max volume', FloatRange(0,100000, unit='uL',), readonly=True)
     
-    max_flow_rate = Parameter('max flow rate', FloatRange(0,100000, unit='mL/min',), readonly=True)
+    target_flow_rate = Parameter('target flow rate', FloatRange(unit='uL/s'), readonly=False)
-    max_volume = Parameter('max volume', FloatRange(0,100000, unit='mL',), readonly=True)
+    real_flow_rate = Parameter('actual flow rate', FloatRange(unit='uL/s'), readonly=True)
-    target_flow_rate = Parameter('target flow rate', FloatRange(unit='mL/min'), readonly=False)
+    
-    real_flow_rate = Parameter('actual flow rate', FloatRange(unit='mL/min'), readonly=True)
+    target = Parameter('target volume', FloatRange(unit='uL'), readonly=False)
-    target = Parameter('target volume', FloatRange(unit='mL'), readonly=False)
 
     no_of_valve_pos = Property('number of valve positions', IntRange(0,10), default=1)
     valve_pos = Parameter('valve position', EnumType('valve', CLOSED=0, APP=1, RES=2, OPEN=3), readonly=False)
 
+    force = Parameter('syringe force', FloatRange(unit='kN'), readonly=True)
+    max_force = Parameter('max device force', FloatRange(unit='kN'), readonly=True)
+    force_limit = Parameter('user force limit', FloatRange(unit='kN'), readonly=False)
+
+    _resolving_force_overload = False
+
     def initModule(self):
         super().initModule()
 
@@ -66,32 +80,41 @@ class SyringePump(Drivable):
         
         self.pump.set_syringe_param(self.inner_diameter_set, self.piston_stroke_set)
 
-        self.pump.set_volume_unit(qmixpump.UnitPrefix.milli, qmixpump.VolumeUnit.litres)
+        self.pump.set_volume_unit(qmixpump.UnitPrefix.micro, qmixpump.VolumeUnit.litres)
 
-        self.pump.set_flow_unit(qmixpump.UnitPrefix.milli, qmixpump.VolumeUnit.litres, qmixpump.TimeUnit.per_minute)
+        self.pump.set_flow_unit(qmixpump.UnitPrefix.micro, qmixpump.VolumeUnit.litres, qmixpump.TimeUnit.per_second)
         
-        self.max_flow_rate = self.pump.get_flow_rate_max()
+        self.max_flow_rate = round(self.pump.get_flow_rate_max(),2)
-        self.max_volume = self.pump.get_volume_max()
+        self.max_volume = round(self.pump.get_volume_max(),2)
-        self.no_of_valve_pos = self.valve.number_of_valve_positions()
         self.valve_pos = self.valve.actual_valve_position()
 
-        self.target_flow_rate = self.max_flow_rate * 0.5
+        self.target_flow_rate = round(self.max_flow_rate * 0.5,2)
-        self.target = self.pump.get_fill_level()
+        self.target = max(0, round(self.pump.get_fill_level(),2))
+
+        self.pump.enable_force_monitoring(True)
+        self.max_force = self.pump.get_max_device_force()
+        self.force_limit = self.max_force
     
     def read_value(self):
-        return self.pump.get_fill_level()
+        return round(self.pump.get_fill_level(),2)
 
     def write_target(self, target):
-        self.pump.set_fill_level(target, self.target_flow_rate)
+        if self.read_valve_pos() == 0 :
-        self.status = BUSY, 'Target changed'
+            self.status = ERROR, 'Cannot pump if valve is closed'
-        return target
+            self.log.warn('Cannot pump if valve is closed')
+            return target
+        else:
+            self.pump.set_fill_level(target, self.target_flow_rate)
+            self.status = BUSY, 'Target changed'
+            self.log.info(f'Started pumping at {self.target_flow_rate} ul/s')
+            return target
 
     def write_target_flow_rate(self, rate):
-        self.pump.target_flow_rate = rate
+        self.target_flow_rate = rate
         return rate
 
     def read_real_flow_rate(self):
-        return self.pump.get_flow_is()
+        return round(self.pump.get_flow_is(),2)
 
     def read_valve_pos(self):
         return self.valve.actual_valve_position()
@@ -100,11 +123,165 @@ class SyringePump(Drivable):
         self.valve.switch_valve_to_position(target_pos)
         return target_pos
 
+    def read_force(self):
+        return round(self.pump.read_force_sensor(),3)
+
+    def read_force_limit(self):
+        return self.pump.get_force_limit()
+
+    def write_force_limit(self, limit):
+        self.pump.write_force_limit(limit)
+        return limit
+
     def read_status(self):
         fault_state = self.pump.is_in_fault_state()
         pumping = self.pump.is_pumping()
+        pump_enabled = self.pump.is_enabled()
+        safety_stop_active = self.pump.is_force_safety_stop_active()
+        
         if fault_state == True:
             return ERROR, 'Pump in fault state'
+        elif self._resolving_force_overload :
+            return BUSY, 'Resolving force overload'
+        elif safety_stop_active:
+            return ERROR, 'Pressure safety stop'
+        elif not pump_enabled:
+            return ERROR, 'Pump not enabled'
+        elif pumping == True:
+            return BUSY, f'Pumping {self.real_flow_rate} ul/s'
+        elif self.read_valve_pos() == 0:
+            return IDLE, 'Valve closed'
+        else:
+            return IDLE, ''
+
+    @Command
+    def stop(self):
+        self.pump.stop_pumping()
+        self.target = self.pump.get_fill_level()
+        self.status = BUSY, 'Stopping'
+
+    @Command
+    def clear_errors(self):
+        """Clear fault state and enable pump"""
+        if self.pump.is_in_fault_state():
+            self.pump.clear_fault()
+            self.log.info('Cleared faults')
+        
+        if not self.pump.is_enabled():
+            self.pump.enable(True)
+            self.log.info('Pump was disabled, re-enabling')
+        
+        self.target = max(0,round(self.value,2))
+        self.status = IDLE, ''
+
+    @Command
+    def resolve_force_overload(self):
+        """Resolve a force overload situation"""
+        if not self.pump.is_force_safety_stop_active():
+            self.status = ERROR, 'No force overload detected'
+            self.log.warn('No force overload to be resolved')
+            return
+        
+        self._resolving_force_overload = True
+        self.status = BUSY, 'Resolving force overload'
+        self.pump.enable_force_monitoring(False)
+
+        flow = 0  - self.pump.get_flow_rate_max() / 100
+        self.pump.generate_flow(flow)
+
+        safety_stop_active = False
+        while not safety_stop_active:
+            time.sleep(0.1)
+            safety_stop_active = self.pump.is_force_safety_stop_active()
+        self.pump.stop_pumping()
+        self.pump.enable_force_monitoring(True)
+
+        time.sleep(0.3)
+        self._resolving_force_overload = False
+        self.status = self.read_status()
+
+class ContiFlowPump(Drivable):
+    io = Attached()
+
+    inner_diameter_set = Property('inner diameter', FloatRange(), default=1)
+    piston_stroke_set = Property('piston stroke', FloatRange(), default=60)
+
+    crossflow_seconds = Property('crossflow duration', FloatRange(unit='s'),default=2)
+    
+    value = PersistentParam('flow rate', FloatRange(unit='uL/s'))
+    status = PersistentParam()
+
+    max_refill_flow = Parameter('max refill flow', FloatRange(unit='uL/s'), readonly=True)
+    refill_flow = Parameter('refill flow', FloatRange(unit='uL/s'), readonly=False)
+
+    max_flow_rate = Parameter('max flow rate', FloatRange(0,100000, unit='uL/s',), readonly=True)
+    target = Parameter('target flow rate', FloatRange(unit='uL/s'), readonly=False)
+
+    def initModule(self):
+        super().initModule()
+
+        self.pump = qmixpump.ContiFlowPump()
+        self.pump.lookup_by_name("ContiFlowPump_1")
+
+    def initialReads(self):
+        if self.pump.is_in_fault_state():
+            self.pump.clear_fault()
+        
+        if not self.pump.is_enabled():
+            self.pump.enable(True)
+
+        self.syringe_pump1 = self.pump.get_syringe_pump(0)
+        self.syringe_pump1.set_syringe_param(self.inner_diameter_set, self.piston_stroke_set)
+        self.syringe_pump2 = self.pump.get_syringe_pump(1)
+        self.syringe_pump2.set_syringe_param(self.inner_diameter_set, self.piston_stroke_set)
+        self.pump.set_volume_unit(qmixpump.UnitPrefix.micro, qmixpump.VolumeUnit.litres)
+        self.pump.set_flow_unit(qmixpump.UnitPrefix.micro, qmixpump.VolumeUnit.litres, qmixpump.TimeUnit.per_second)
+
+        self.pump.set_device_property(ContiFlowProperty.SWITCHING_MODE, ContiFlowSwitchingMode.CROSS_FLOW)
+        self.max_refill_flow = self.pump.get_device_property(ContiFlowProperty.MAX_REFILL_FLOW)
+        self.pump.set_device_property(ContiFlowProperty.REFILL_FLOW, self.max_refill_flow / 2.0)
+        self.pump.set_device_property(ContiFlowProperty.CROSSFLOW_DURATION_S, self.crossflow_seconds)
+        self.pump.set_device_property(ContiFlowProperty.OVERLAP_DURATION_S, 0)
+        
+        self.max_flow_rate = self.pump.get_flow_rate_max()
+        self.target = 0
+
+    def read_value(self):
+        return round(self.pump.get_flow_is(),3)
+
+    def write_target(self, target):
+        if target <= 0:
+            self.pump.stop_pumping()
+            self.status = self.read_status()
+            return 0
+        else:
+            self.pump.generate_flow(target)
+            self.status = BUSY, 'Target changed'
+            return target
+
+    def read_refill_flow(self):
+        return round(self.pump.get_device_property(ContiFlowProperty.REFILL_FLOW),3)
+
+    def write_refill_flow(self, refill_flow):
+        self.pump.set_device_property(ContiFlowProperty.REFILL_FLOW, refill_flow)
+        self.max_flow_rate = self.pump.get_flow_rate_max()
+        return refill_flow
+
+    def read_status(self):
+        fault_state = self.pump.is_in_fault_state()
+        pumping = self.pump.is_pumping()
+        pump_enabled = self.pump.is_enabled()
+        pump_initialised = self.pump.is_initialized()
+        pump_initialising = self.pump.is_initializing()
+        
+        if fault_state == True:
+            return ERROR, 'Pump in fault state'
+        elif not pump_enabled:
+            return ERROR, 'Pump not enabled'
+        elif not pump_initialised:
+            return WARN, 'Pump not initialised'
+        elif pump_initialising:
+            return BUSY, 'Pump initialising'
         elif pumping == True:
             return BUSY, 'Pumping'
         else:
@@ -113,4 +290,24 @@ class SyringePump(Drivable):
     @Command
     def stop(self):
         self.pump.stop_pumping()
-        self.target = self.pump.get_fill_level()
+        self.target = 0
+        self.status = BUSY, 'Stopping'
+
+    @Command
+    def clear_errors(self):
+        """Clear fault state and enable pump"""
+        if self.pump.is_in_fault_state():
+            self.pump.clear_fault()
+            self.log.info('Cleared faults')
+        
+        if not self.pump.is_enabled():
+            self.pump.enable(True)
+            self.log.info('Pump was disabled, re-enabling')
+        
+        self.target = 0
+        self.status = IDLE, ''
+
+    @Command
+    def initialise(self):
+        """Initialise the ConfiFlow pump"""
+        self.pump.initialize()

frappy_psi/gilsonpump.py

@@ -0,0 +1,104 @@
+# Author: Wouter Gruenewald<wouter.gruenewald@psi.ch>
+
+from frappy.core import StringType, BoolType, EnumType, FloatRange, Parameter, Property, PersistentParam, Command, IDLE, ERROR, WARN, BUSY, Drivable
+
+
+class PeristalticPump(Drivable):
+    value = Parameter('Pump speed', FloatRange(0,100,unit="%"), default=0)
+    target = Parameter('Target pump speed', FloatRange(0,100,unit="%"), default=0)
+    status = Parameter()
+
+    addr_AO = Property('Address of the analog out', StringType())
+    addr_dir_relay = Property('Address of the direction relay', StringType())
+    addr_run_relay = Property('Address of the running relay', StringType())
+
+    direction = Parameter('pump direction', EnumType('direction', CLOCKWISE=0, ANTICLOCKWISE=1), default=0, readonly=False)
+    active = Parameter('pump running', BoolType(), default=False, readonly=False)
+
+    def initModule(self):
+        super().initModule()
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO+'_enabled', 'w') as f :
+            f.write('0')
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO+'_mode', 'w') as f :
+            f.write('V')
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO, 'w') as f :
+            f.write('0')
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO+'_enabled', 'w') as f :
+            f.write('1')
+
+    def shutdownModule(self):
+        '''Disable analog output'''
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO, 'w') as f :
+            f.write('0')
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO+'_enabled', 'w') as f :
+            f.write('0')
+
+    def read_value(self):
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO, 'r') as f :
+            raw_value = f.read().strip('\n')
+        value = (int(raw_value) / 5000) * 100
+        return value
+
+    def write_target(self, target):
+        raw_value = (target / 100)*5000
+        with open('/sys/class/ionopimax/analog_out/'+self.addr_AO, 'w') as f :
+            f.write(str(int(raw_value)))
+        return target
+
+    def read_direction(self):
+        with open('/sys/class/ionopimax/digital_out/'+self.addr_dir_relay, 'r') as f :
+            raw_direction = f.read().strip('\n')
+        if raw_direction == '0' or raw_direction == 'F':
+            return 0
+        if raw_direction == '1' or raw_direction == 'S':
+            return 1
+        else:
+            return None
+
+    def write_direction(self, direction):
+        if direction == 0:
+            raw_direction = '0'
+        elif direction == 1:
+            raw_direction = '1'
+        with open('/sys/class/ionopimax/digital_out/'+self.addr_dir_relay, 'w') as f :
+            f.write(raw_direction)
+        return direction
+
+    def read_active(self):
+        with open('/sys/class/ionopimax/digital_out/'+self.addr_run_relay, 'r') as f :
+            raw_active = f.read().strip('\n')
+        if raw_active == '0' or raw_active == 'F':
+            return False
+        elif raw_active == '1' or raw_active == 'S':
+            return True
+        else:
+            return None
+
+    def write_active(self, active):
+        if active == False:
+            raw_active = '0'
+        elif active == True:
+            raw_active = '1'
+        with open('/sys/class/ionopimax/digital_out/'+self.addr_run_relay, 'w') as f :
+            f.write(raw_active)
+        return active
+
+
+    def read_status(self):
+        with open('/sys/class/ionopimax/digital_out/'+self.addr_dir_relay, 'r') as f :
+            raw_direction = f.read().strip('\n')
+        with open('/sys/class/ionopimax/digital_out/'+self.addr_run_relay, 'r') as f :
+            raw_active = f.read().strip('\n')
+
+        if raw_direction == 'F' or raw_direction == 'S':
+            return ERROR, 'Fault on direction relay'
+        elif raw_active == 'F' or raw_active == 'S':
+            return ERROR, 'Fault on pump activation relay'
+        elif self.active == True:
+            return BUSY, 'Pump running'
+        else:
+            return IDLE, ''
+
+    @Command
+    def stop(self):
+        self.write_active(False)

frappy_psi/phytron.py

@@ -62,7 +62,7 @@ class Motor(HasOffset, HasStates, PersistentMixin, HasIO, Drivable):
 
     encoder_mode = Parameter('how to treat the encoder', EnumType('encoder', NO=0, READ=1, CHECK=2),
                              default=1, readonly=False)
-    check_limit_switches = Parameter('whethter limit switches are checked',BoolType(),
+    check_limit_switches = Parameter('whether limit switches are checked',BoolType(),
                                      default=0, readonly=False)
     value = PersistentParam('angle', FloatRange(unit='deg'))
     status = PersistentParam()
@@ -90,6 +90,8 @@ class Motor(HasOffset, HasStates, PersistentMixin, HasIO, Drivable):
     status_bits = ['power stage error', 'undervoltage', 'overtemperature', 'active',
                    'lower switch active', 'upper switch active', 'step failure', 'encoder error']
 
+    _doing_reference = False
+
     def get(self, cmd):
         return self.communicate(f'{self.address:x}{self.axis}{cmd}')
 
@@ -178,10 +180,14 @@ class Motor(HasOffset, HasStates, PersistentMixin, HasIO, Drivable):
 
     def doPoll(self):
         super().doPoll()
-        if self._running and not self.isBusy():
+        if self._running and not self.isBusy() and not self._doing_reference:
             if time.time() > self._stopped_at + 5:
                 self.log.warning('stop motor not started by us')
                 self.hw_stop()
+        if self._doing_reference and self.get('=H') == 'E' :
+            self.status = IDLE, ''
+            self.target = 0
+            self._doing_reference = False
 
     def read_status(self):
         hexstatus = 0x100
@@ -207,6 +213,9 @@ class Motor(HasOffset, HasStates, PersistentMixin, HasIO, Drivable):
         if status[0] == ERROR:
             self._blocking_error = status[1]
             return status
+        if self._doing_reference and self.get('=H') == 'N':
+            status = BUSY, 'Doing reference run'
+            return status
         return super().read_status()  # status from state machine
 
     def check_moving(self):
@@ -346,3 +355,10 @@ class Motor(HasOffset, HasStates, PersistentMixin, HasIO, Drivable):
             self.status = 'IDLE', 'after error reset'
             self._blocking_error = None
             self.target = self.value  # clear error in target
+
+    @Command
+    def make_ref_run(self):
+        '''Do reference run'''
+        self._doing_reference = True
+        self.status = BUSY, 'Doing reference run'
+        self.communicate(f'{self.address:x}{self.axis}0-')

frappy_psi/rheo_trigger.py

@@ -0,0 +1,70 @@
+from frappy.core import StringType, BoolType, Parameter, Property, PersistentParam, Command, IDLE, ERROR, WARN, Writable
+import time
+
+class RheoTrigger(Writable):
+    addr = Property('Port address', StringType())
+    value = Parameter('Output state', BoolType(), default=0)
+    target = Parameter('target', BoolType(), default=0, readonly=False)
+    status = Parameter()
+    doBeep = Property('Make noise', BoolType(), default=0)
+
+    _status = 0
+
+    def initModule(self):
+        super().initModule()
+        with open('/sys/class/ionopimax/digital_io/'+self.addr+'_mode', 'w') as f :
+            f.write('out')
+
+        if self.doBeep:
+            with open('/sys/class/ionopimax/buzzer/beep', 'w') as f :
+                f.write('200 50 3')
+
+    def read_value(self):
+        with open('/sys/class/ionopimax/digital_io/'+self.addr, 'r') as f :
+            file_value = f.read()
+        if file_value == '0\n':
+            value = False
+            self._status = 0
+        elif file_value == '1\n':
+            value = True
+            self._status = 1
+        else:
+            self._status = -1
+            value = False
+        return value
+
+    
+    def write_target(self,target):
+        if target == self.value:
+            return target
+        else: 
+            with open('/sys/class/ionopimax/digital_io/'+self.addr, 'w') as f :
+                if target == True:
+                    f.write('1')
+                elif target == False:
+                    f.write('0')
+            time.sleep(0.05)
+            if self.doBeep:
+                with open('/sys/class/ionopimax/buzzer/beep', 'w') as f :
+                    f.write('200')
+            self.status = self.read_status()
+            return target
+
+    def read_status(self):
+        self.value = self.read_value()
+        if self._status == 0:
+            return IDLE, 'Signal low'
+        elif self._status == 1:
+            return IDLE, 'Signal high'
+        else:
+            return ERROR, 'Cannot read status'
+    
+    
+    @Command
+    def toggle(self):
+        """Toggle output"""
+        value = self.read_value()
+        if value == True:
+            self.write_target(False)
+        else:
+            self.write_target(True)