Formatted and added bmi task

plot.py

@@ -30,36 +30,6 @@ TEXT = (230, 235, 240)
 ERROR = (255, 110, 110)
 LINE_RE = re.compile(r"\[<([^>]+)>\]:\s*(.*)")
 
-DEFAULT_CONFIG = {
-    "title": "IMU stream",
-    "history_seconds": 10.0,
-    "graphs": [
-        {
-            "title": "Accelerometer",
-            "streams": [
-                {"key": "acc_x", "label": "ACC X", "color": [90, 170, 255]},
-                {"key": "acc_y", "label": "ACC Y", "color": [80, 220, 140]},
-                {"key": "acc_z", "label": "ACC Z", "color": [255, 200, 60]},
-            ],
-        },
-        {
-            "title": "Gyroscope",
-            "streams": [
-                {"key": "gyr_x", "label": "GYR X", "color": [240, 80, 80]},
-                {"key": "gyr_y", "label": "GYR Y", "color": [220, 80, 220]},
-                {"key": "gyr_z", "label": "GYR Z", "color": [240, 240, 240]},
-            ],
-        },
-    ],
-    "sources": [
-        {
-            "tag": "IMU",
-            "fields": ["acc_x", "acc_y", "acc_z", "gyr_x", "gyr_y", "gyr_z"],
-        }
-    ],
-}
-
-
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
         description="Read tagged serial values and draw them live from a JSON config."
@@ -77,7 +47,7 @@ def parse_args() -> argparse.Namespace:
         "--config",
         type=Path,
         default=None,
-        help="Path to JSON plot config (default: built-in IMU config)",
+        help="Path to JSON plot config (default: ./plot_config.json)",
     )
     parser.add_argument(
         "--history-seconds",
@@ -108,7 +78,10 @@ def parse_args() -> argparse.Namespace:
 
 def load_config(config_path: Path | None) -> dict:
     if config_path is None:
-        return DEFAULT_CONFIG
+        config_path = Path("plot_config.json")
+
+    if not config_path.exists():
+        raise SystemExit(f"Config file not found: {config_path}")
 
     with config_path.open("r", encoding="utf-8") as handle:
         return json.load(handle)