diff --git a/dumb-inverter.py b/dumb-inverter.py
deleted file mode 100644
index a26d200..0000000
--- a/dumb-inverter.py
+++ /dev/null
@@ -1,97 +0,0 @@
-import json
-import os
-import panel
-from datetime import datetime
-from typing import Any
-
-from pydantic import BaseModel
-
-from watt42_viewlib import attach_w42_state
-
-panel.extension('echarts', 'ace', 'jsoneditor')
-
-SYSTEM_ID = os.environ.get("WATT42_SYSTEM_ID", "invalid-system-id")
-API_TOKEN = os.environ.get("WATT42_API_TOKEN", "invalid-api-token")
-
-w42_state = panel.rx(None)
-
-attach_w42_state(rx_var=w42_state, system_id=SYSTEM_ID, token=API_TOKEN)
-
-class PvForecast(BaseModel):
-    at: datetime = datetime.now()
-    slots: list[float] = []
-
-class LoadForecast(BaseModel):
-    at: datetime = datetime.now()
-    slots: list[float] = []
-
-
-class InverterForecast(BaseModel):
-    levels: list[float] = []
-    
-class SystemState(BaseModel):
-    pv_forecast: PvForecast = PvForecast()
-    load_forecast: LoadForecast = LoadForecast()
-    value: int = 42
-    inverter: InverterForecast = InverterForecast()
-
-def state_to_text(state: dict[str, Any]) -> str:
-    return f"Watt42 State:\n\n```\n{json.dumps(state, indent=2)}\n```\n\nReplace this with some awesome visuals"
-
-state_as_text = panel.bind(state_to_text, w42_state)
-
-state_pane = panel.pane.Markdown(state_as_text, sizing_mode='stretch_width')
-
-def chart1(state: SystemState) -> dict:
-    """ Return an ECharts option dict visualizing some aspect of the state."""
-
-    now = state.load_forecast.at
-    pv_slots = state.pv_forecast.slots
-    load_slots = state.load_forecast.slots
-    hours = list(range(len(pv_slots)))
-    option = {
-        "title": {"text": f"PV and Load Forecast at {now.strftime('%Y-%m-%d %H:%M')}"},
-        "tooltip": {"trigger": "axis"},
-        "legend": {"data": ["PV Forecast", "Load Forecast", "Inverter Level"]},
-        "xAxis": {"type": "category", "data": hours, "name": "Hours"},
-        "yAxis": {"type": "value", "name": "Power (kW)"},
-        "series": [
-            {
-                "name": "PV Forecast",
-                "type": "line",
-                "data": pv_slots,
-            },
-            {
-                "name": "Load Forecast",
-                "type": "line",
-                "data": load_slots,
-            },
-            {
-                "name": "Inverter Level",
-                "type": "line",
-                "data": state.inverter.levels,
-            }
-        ],
-    }
-    return option
-
-chart1_rx = panel.rx(chart1)(panel.rx(lambda s: SystemState.model_validate(s) if s else SystemState())(w42_state))
-
-
-sidebar_content = """
-Demonstrates how to visualize the Watt42 "dumb inverter simulation" system state.
-
-Find instructions on [how to use this example
-here](https://source.c3.uber5.com/watt42-public/watt42_viewlib/src/branch/main/README.md#how-to-use).
-
-"""
-
-_ = panel.template.FastListTemplate(
-    title="Watt42: Dumb Inverter Visualization Example",
-    sidebar=[panel.pane.Markdown(sidebar_content, sizing_mode='stretch_width')],
-    main=[
-        panel.pane.ECharts(chart1_rx, sizing_mode='stretch_width', height=400, theme='light'),
-        state_pane,
-        w42_state,
-    ],
-).servable()
diff --git a/sample2.py b/sample2.py
index d6dfbf0..96b4463 100644
--- a/sample2.py
+++ b/sample2.py
@@ -1,5 +1,4 @@
 import json
-import os
 import panel
 from datetime import datetime, timedelta
 
@@ -9,8 +8,8 @@ from watt42_viewlib import attach_w42_state
 
 panel.extension('echarts', 'ace', 'jsoneditor')
 
-SYSTEM_ID = os.environ.get("WATT42_SYSTEM_ID", "invalid-system-id")
-API_TOKEN = os.environ.get("WATT42_API_TOKEN", "invalid-api-token")
+SYSTEM_ID = "79476e53-dea6-44fa-976c-eff6260baeb6"
+API_TOKEN = "d0vA6CsrY69N3JAOGtuZMEb9QpbJWPcoxhxRyBXZn8SIisB3weLKjMZwQRo8c2k9BRDtK0qHYnsvUMnqeO7Xog"
 
 w42_state = panel.rx(None)
 
diff --git a/watt42_viewlib/__init__.py b/watt42_viewlib/__init__.py
index ca8dd0d..7f733d0 100644
--- a/watt42_viewlib/__init__.py
+++ b/watt42_viewlib/__init__.py
@@ -1,7 +1,6 @@
 import asyncio
 import json
 import logging
-import os
 import panel
 
 from websockets import ConnectionClosed
@@ -9,11 +8,9 @@ from websockets.asyncio.client import connect
 
 logger = logging.getLogger(__name__)
 
-default_ws_url = "wss://service.watt42.com/ws/systems"
-
 def attach_w42_state(rx_var: panel.rx, system_id: str, token: str):
 
-    WS_URL = os.environ.get("WATT42_WS_URL", default_ws_url)
+    WS_URL = "ws://localhost:8000/ws/systems" # TODO: make configurable
 
     must_reconnect = True