diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b6e4761
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,129 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
diff --git a/eval.py b/eval.py
new file mode 100644
index 0000000..2e9eb10
--- /dev/null
+++ b/eval.py
@@ -0,0 +1,78 @@
+import ast
+import operator
+
+from utils import typename
+
+
+BIN_OPS = {
+    ast.Add:  operator.add,
+    ast.Sub:  operator.sub,
+    ast.Mult: operator.mul,
+    ast.Div:  operator.truediv,
+    ast.Mod:  operator.mod
+}
+
+UNARY_OPS = {
+    ast.UAdd: operator.pos,
+    ast.USub: operator.neg
+}
+
+
+def forgiving_eval(value):
+    try:
+        return arithmetic_eval(value)
+    except:
+        return value
+
+
+def arithmetic_eval(s):
+    node = ast.parse(s, mode="eval")
+    return ast_node_eval(node.body)
+
+
+def ast_node_eval(node):
+    if isinstance(node, ast.Expression):
+        return ast_node_eval(node.body)
+    elif isinstance(node, ast.Str):
+        return node.s
+    elif isinstance(node, ast.Num):
+        return node.n
+    elif isinstance(node, ast.BinOp):
+        op = get_operator(node, BIN_OPS)
+        left  = ast_node_eval(node.left)
+        right = ast_node_eval(node.right)
+        return op(left, right)
+    elif isinstance(node, ast.UnaryOp):
+        op = get_operator(node, UNARY_OPS)
+        operand = ast_node_eval(node.operand)
+        return op(operand)
+    else:
+        tn = typename(node)
+        raise ArithmeticEvalError(f"Unsupported node type {tn}")
+
+
+def get_operator(node, ops):
+    op_type = type(node.op)
+    try:
+        op = ops[op_type]
+    except KeyError as e:
+        nn = typename(node)
+        on = typename(node.op)
+        raise ArithmeticEvalError(f"Unsupported {nn} {on}") from e
+    else:
+        return op
+
+
+class ArithmeticEvalError(Exception):
+    pass
+
+
+
+#TODO:
+#print like SyntaxError:
+#    "something with an error here"
+#                             ^
+#this needs full string and offset of current node within full string stored
+
+
+
diff --git a/fake.py b/fake.py
new file mode 100644
index 0000000..bfa1991
--- /dev/null
+++ b/fake.py
@@ -0,0 +1,41 @@
+
+data = {
+    "TEST0_psen_db": {
+        "x": None,
+        "aaa": "aaa",
+        "bbbbbb": 2,
+        "c": "cccccc"
+    },
+
+    "TEST1_psen_db1": {
+        "x": None,
+        "bbbbbb": 2,
+        "c": "cccccc"
+    },
+
+    "TEST2TEST2_psen_db": {
+        "x": None,
+        "y": [1,2,3],
+        "aaa": "aaa",
+        "c": "cccccc"
+    },
+
+    "ignored": {}
+}
+
+
+server_info = {
+    "active_instances": list(data.keys())
+}
+
+
+class PipelineClient:
+    def __init__(*args, **kwargs):
+        pass
+    def get_server_info(self):
+        return server_info
+    def get_instance_config(self, name):
+        return data[name]
+
+
+
diff --git a/listentry.py b/listentry.py
new file mode 100644
index 0000000..0254299
--- /dev/null
+++ b/listentry.py
@@ -0,0 +1,34 @@
+import wx
+from mathentry import MathEntry
+
+
+class ListEntry(wx.BoxSizer):
+
+    def __init__(self, parent, id=wx.ID_ANY, value=(), style=wx.TE_RIGHT):
+        super().__init__(wx.HORIZONTAL)
+        self.parent = parent
+        self.style = style
+        self.entries = []
+        self.SetValue(value)
+
+
+    def SetValue(self, value):
+        self.entries.clear()
+        self.Clear(True)
+        for v in value:
+            new = MathEntry(self.parent, value=v, style=self.style)
+            self.entries.append(new)
+            self.Add(new, flag=wx.EXPAND)
+
+
+    def GetValue(self):
+        return [e.GetValue() for e in self.entries]
+
+    def Disable(self):
+        return [e.Disable() for e in self.entries]
+
+    def Enable(self):
+        return [e.Enable() for e in self.entries]
+
+
+
diff --git a/mathentry.py b/mathentry.py
new file mode 100644
index 0000000..8119ac3
--- /dev/null
+++ b/mathentry.py
@@ -0,0 +1,87 @@
+import wx
+from eval import arithmetic_eval
+from utils import typename
+
+
+class MathEntry(wx.TextCtrl):
+
+    def __init__(self, *args, value="", **kwargs):
+        if "style" in kwargs:
+            kwargs["style"] |= wx.TE_PROCESS_ENTER
+        else:
+            kwargs["style"] = wx.TE_PROCESS_ENTER
+
+        self.value_type = type(value)
+        value = str(value)
+        wx.TextCtrl.__init__(self, *args, value=value, **kwargs)
+
+        self._alarm = False
+        self._last_good_value = self.GetValue()
+
+        self.Bind(wx.EVT_TEXT_ENTER, self.on_enter)
+        self.Bind(wx.EVT_KEY_UP, self.on_escape)
+
+
+    def GetValue(self):
+        val = super().GetValue()
+        try:
+            val = self.value_type(val)
+        except ValueError:
+            pass
+        return val
+
+
+    def SetValue(self, val):
+        val = str(val)
+        super().SetValue(val)
+
+
+    def on_enter(self, event):
+        val = super().GetValue()
+
+        self._unset_alarm()
+
+        try:
+            val = arithmetic_eval(val)
+            self.value_type = type(val)
+        except SyntaxError as e:
+            en = typename(e)
+            msg = e.args[0]
+            msg = f"{en}: {msg}"
+            self._set_alarm(msg)
+            self.SetInsertionPoint(e.offset)
+        except Exception as e:
+            en = typename(e)
+            msg = f"{en}: {e}"
+            self._set_alarm(msg)
+            self.SetInsertionPointEnd()
+        else:
+            self.SetValue(val)
+            self._last_good_value = val
+
+        event.Skip()
+
+
+    def on_escape(self, event):
+        code = event.GetKeyCode()
+        if code != wx.WXK_ESCAPE:
+            event.Skip()
+            return
+
+        if self._alarm:
+            self.SetValue(self._last_good_value)
+            self._unset_alarm()
+
+
+    def _set_alarm(self, msg):
+        self._alarm = True
+        self.SetToolTip(msg)
+        self.SetForegroundColour(wx.RED)
+
+    def _unset_alarm(self):
+        self._alarm = False
+        self.SetToolTip(None)
+        self.SetForegroundColour(wx.NullColour)
+
+
+
diff --git a/scam.py b/scam.py
new file mode 100755
index 0000000..0156f18
--- /dev/null
+++ b/scam.py
@@ -0,0 +1,150 @@
+#!/usr/bin/env python3
+import wx
+
+#from cam_server_client import PipelineClient
+from fake import PipelineClient
+
+from tools import EXPANDING, STRETCH, make_filled_vbox, make_filled_hbox
+from mathentry import MathEntry
+from listentry import ListEntry
+
+
+
+pc = PipelineClient("http://sf-daqsync-01:8889")
+si = pc.get_server_info()
+ai = si["active_instances"]
+pls = (i for i in ai if "psen_db" in i)
+pls = sorted(pls)
+
+
+
+class MainFrame(wx.Frame):
+
+    def __init__(self, parent=None, title="test"):
+        super().__init__(parent, title=title)
+
+        panel_main = MainPanel(self)
+
+        self.sizer = sizer = make_filled_vbox([panel_main])
+        self.SetSizerAndFit(sizer)
+
+
+
+class MainPanel(wx.Panel):
+
+    def __init__(self, parent):
+        super().__init__(parent)
+
+        self.cb_pls = cb_pls = wx.ComboBox(self, choices=pls)
+        self.entries = entries = SettingsList(self)
+        self.btn_print = btn_print = wx.Button(self, label="Print")
+
+        cb_pls.Bind(wx.EVT_COMBOBOX, self.on_select)
+        btn_print.Bind(wx.EVT_BUTTON, self.on_print)
+
+        widgets = [cb_pls, entries, btn_print]
+        sizer = make_filled_vbox(widgets)
+        self.SetSizer(sizer)
+
+
+    def on_select(self, event):
+        instance = self.cb_pls.GetValue()
+        cfg = pc.get_instance_config(instance)
+        self.entries.update(cfg)
+        self._adjust_size()
+
+
+    def _adjust_size(self):
+        parent = self.GetParent()
+        parent.sizer.Layout()
+        parent.Fit()
+
+
+    def on_print(self, event):
+        data = self.entries.get()
+        print(data)
+
+
+
+class SettingsList(wx.GridSizer):
+
+    def __init__(self, parent, hgap=5, vgap=5):
+        super().__init__(cols=2, hgap=hgap, vgap=vgap)
+        self.parent = parent
+        self.children = []
+
+    def update(self, cfg):
+        self.clear()
+        for k, v in sorted(cfg.items()):
+            self.add(k, v)
+
+    def clear(self):
+        self.Clear(True)
+
+    def add(self, *args):
+        new = Setting(self.parent, *args)
+        self.children.append(new)
+        self.Add(new.state)
+        self.Add(new.text, 0, wx.EXPAND|wx.ALL)
+
+    def get(self):
+        res = {}
+        for i in self.children:
+            name = i.get_name()
+            print(name)
+            if i.get_state():
+                value = i.get_value()
+            else:
+                value = None
+            res[name] = value
+        return res
+
+
+
+class Setting:
+
+    def __init__(self, parent, label, value):
+        self.state = state = wx.CheckBox(parent, label=label)
+
+        if isinstance(value, list):
+            self.text = text = ListEntry(parent, style=wx.TE_RIGHT)
+        else:
+            self.text = text = MathEntry(parent, style=wx.TE_RIGHT)
+
+        state.Bind(wx.EVT_CHECKBOX, self.on_state_change)
+
+        if value is None:
+            state.SetValue(False)
+            text.Disable()
+        else:
+            state.SetValue(True)
+            text.SetValue(value)
+
+
+    def get_name(self):
+        return self.state.GetLabel()
+
+    def get_state(self):
+        return self.state.GetValue()
+
+    def get_value(self):
+        return self.text.GetValue()
+
+
+    def on_state_change(self, event):
+        if self.get_state():
+            self.text.Enable()
+        else:
+            self.text.Disable()
+
+
+
+
+
+app = wx.App()
+frame = MainFrame()
+frame.Show()
+app.MainLoop()
+
+
+
diff --git a/tools.py b/tools.py
new file mode 100644
index 0000000..c9d8f8c
--- /dev/null
+++ b/tools.py
@@ -0,0 +1,59 @@
+import wx
+
+
+WX_DEFAULT_RESIZABLE_DIALOG_STYLE = wx.DEFAULT_DIALOG_STYLE|wx.RESIZE_BORDER|wx.MINIMIZE_BOX|wx.MAXIMIZE_BOX
+
+
+class EXPANDING: pass
+class STRETCH: pass
+
+
+
+def post_event(event, source):
+    evt = wx.PyCommandEvent(event.typeId, source.GetId())
+    wx.PostEvent(source, evt)
+
+
+def copy_to_clipboard(val):
+    clipdata = wx.TextDataObject()
+    clipdata.SetText(val)
+    wx.TheClipboard.Open()
+    wx.TheClipboard.SetData(clipdata)
+    wx.TheClipboard.Close()
+
+
+
+def make_filled_vbox(widgets, proportion=0, flag=wx.ALL|wx.EXPAND, border=0, box=None):
+    return make_filled_box(wx.VERTICAL, widgets, proportion, flag, border, box)
+
+def make_filled_hbox(widgets, proportion=1, flag=wx.ALL|wx.EXPAND, border=0, box=None):
+    return make_filled_box(wx.HORIZONTAL, widgets, proportion, flag, border, box)
+
+
+def make_filled_box(orient, widgets, proportion, flag, border, box):
+    if box is None:
+        box = wx.BoxSizer(orient)
+
+    OTHER_PROP = {
+        0: 1,
+        1: 0
+    }
+
+    expand = False
+
+    for i in widgets:
+        if i is STRETCH:
+            box.AddStretchSpacer()
+        elif i is EXPANDING:
+            expand = True # store for (and then apply to) next widget
+        else:
+            prop = proportion
+            if expand:
+                expand = False # apply only once
+                prop = OTHER_PROP[prop] # other proportion makes widget expanding
+            box.Add(i, proportion=prop, flag=flag, border=border)
+
+    return box
+
+
+
diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..c3d4936
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,5 @@
+
+def typename(obj):
+    return type(obj).__name__
+
+