This app, BreezeView BT 1.5 shows wind speed from an Etesian Technologies wireless Bluetooth LE cup anemometer. Our users demand and need "instant on" presentation of wind speed for their often critical safety measurements. The design of this app kept this in mind at all stages of its development.
All functionality of the app is on a single screen. The user enters the sensor ID to select the proper sensor. This is required in the event that more than one Etesian Bluetooth LE sensor is located within range of the iPhone.
This ID number only need be entered once. It is saved so that on subsequent running of the app, the app remembers the sensor ID. But, if the user has more than one sensor, they can at any time change the ID number to select the preferred sensor.
An option for the user is to choose their preferred units of measurement: miles per hour (mph), meters per second (m/s), knots, or kilometers per hour (kph).
The wind speed is shown both in a text box and graphically. A single bar that has a white background fills with blue in real time according to the wind speed received from the sensor. Along the top of the bar are three colors: green, amber, red, which correspond roughly with the level of concern the user might have in regards to potentially damaging winds. In mph the breaks are at 25 and 50 mph. If the combined wind speed / wind direction sensor was purchased, the app will additionally display the wind direction.
There is a virtual flashing green "LED" to indicate that a Bluetooth packet has been successfully received, decoded and displayed. The sensor advertises once every 3 seconds. The data is packaged in the Bluetooth advertisement. Using this method more than one iPhone can view data from a single sensor.
If no signal is present for about 7 seconds, the bar will display the text "No Signal", and the data replaced with"NA".
Every sensor has an auxiliary temperature sensor. The ambient temperature and the signal strength are indicated in text boxes in the bottom half of the display, just above the company logo and tag line.