diff --git a/firmware/co2_sensor/co2_sensor.ino b/firmware/co2_sensor/co2_sensor.ino
index 5189017..5db4337 100644
--- a/firmware/co2_sensor/co2_sensor.ino
+++ b/firmware/co2_sensor/co2_sensor.ino
@@ -61,6 +61,7 @@ void setup() {
     display.clearDisplay();
     display.setCursor(0, 0);
     display.println(F("SCD40 Ready!"));
+    display.println(F("Wait for sensor measurement..."));
     display.display();
     delay(5000);
   }