The best way to tell is to press the small button on your sensor once. You should see a green light flash slowly.
If you have a diskus (circle-shaped) or respimat (tube-shaped) sensor, you should hear a beep when you've pressed the button hard enough and then you'll see the green light. If you have a sensor for MDI (L-shaped) inhalers, you won't hear a beep, but the sensor will still flash green.
If you see an orange/red light flash slowly, try waiting a minute and then press the small button again. You should see a green light flash slowly.
If your sensor does not light up, consistently lights up orange/red, or doesn't communicate with your app anymore, simply call our office on 877 251 5451 or email us at firstname.lastname@example.org. We can send you a new sensor.