diff --git a/raspberry_pi4_sht30/config.py b/raspberry_pi4_sht30/config.py
index d02a779..47d357f 100644
--- a/raspberry_pi4_sht30/config.py
+++ b/raspberry_pi4_sht30/config.py
@@ -99,9 +99,17 @@ try:
     from config_local import SENSOR_NAME  # noqa: F811 — per-device display name override
 except ImportError:
     pass
+try:
+    # Per-device report cadence. Leak-node co-sensor (id 1/3) reports every 600s (10 min)
+    # to match the leak node's cadence; the standalone Pi-B (sensor2) keeps the 3600s (1 h) default.
+    from config_local import REPORT_INTERVAL  # noqa: F811 — per-device report interval override
+except ImportError:
+    pass
 
 # Validate (fail closed) — a typo must not silently start with a wrong/plausible id.
 if not (isinstance(SENSOR_ID, int) and 1 <= SENSOR_ID <= 255):
     raise RuntimeError(f"SENSOR_ID must be int 1..255 (check config_local.py): {SENSOR_ID!r}")
 if not (isinstance(SENSOR_NAME, str) and SENSOR_NAME):
     raise RuntimeError("SENSOR_NAME must be a non-empty string (check config_local.py).")
+if not (isinstance(REPORT_INTERVAL, int) and REPORT_INTERVAL > 0):
+    raise RuntimeError(f"REPORT_INTERVAL must be a positive int (seconds) (check config_local.py): {REPORT_INTERVAL!r}")