fix chart config parameters

- add SEA dil pressures
- read config each time when it is used

influxgraph.py

@@ -58,14 +58,11 @@ class InfluxGraph(HandlerBase):
         self.server = server
         self.db = server.db
         # self.influx_data_getter = influx_data_getter
-        self.chart_configs = [ChartConfig("./config/generic.ini")]
+        self.chart_configs = ["./config/generic.ini"]
         self.instrument = instrument
         self.device_name = device_name
         if instrument:  # TODO: should it not be better to have inifiles per device?
-            try:
-                self.chart_configs.append(ChartConfig(f"./config/{instrument}.ini"))
-            except KeyError:
-                pass
+            self.chart_configs.append(f"./config/{instrument}.ini")
         self.livemode = self.HISTORICAL
         self.last_values = {}  # dict <variable> of last known point (<time>, <value>)
         self.last_time = {}  # dict <stream> of last received time
@@ -204,12 +201,11 @@ class InfluxGraph(HandlerBase):
         config = {}
         if chart_configs:
             for chart_config in chart_configs:
-                for key, cfg in chart_config.variables.items():
+                for key, cfg in ChartConfig(chart_config).variables.items():
                     config.setdefault(key, {}).update(cfg)
         if user_config:
             for key, cfg in user_config.items():
                 config.setdefault(key, {}).update(cfg)
-
         groups = {}
 
         def add_to_groups(name, cat=None, unit='1', color='', label=None):