diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 10fac5c..a5e4c9d 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -416,7 +416,7 @@ void _fsm_loop()
     /* -------------------------------------------------------------------------------- */
     case FSM_STATE_5:
       //debug("read sensor data check");
-      if ((update_sensor_cnt + (UPDATE_SENSOR_INTERVAL_S * 1000)) <= millis())
+      if ((update_sensor_cnt + (UPDATE_SENSOR_INTERVAL_S * 1000)) <= millis() or validData == false)
       {
         debug("read sensor data " + String(sensor_cnt));