Dynon Avionics D2 Wi-Fi Troubleshooting Guide - Manual

D2 Wi-Fi Troubleshooting Guide Revised September 7, 2013 Page 1
Dynon D2 Wi-Fi troubleshooting
There are three components involved in a complete D2 Wi-Fi communications solution. All three must
correctly play their part for a working solution.
1. The D2 itself which behaves as a Wi-Fi access point.
2. The Apple iPad, Android or other tablet computer which acts as a Wi-Fi client.
3. The AHRS-aware application running on the tablet computer.
Assumptions
While the D2 supports any Wi-Fi device that is able to process AHRS data over a Wi-Fi connection, for
purposes of this document, we will assume that an Apple iPad Wi-Fi device is being used.
Instructions applicable to all Applications
When connecting to any AHRS device including the D2, the Apple iPad will be unable to connect to the
internet unless Wi-Fi is connected to your internet access point. It is therefore important to be certain
your application databases (weather, airport, fuel, charts, etc.) are up to date from the internet. By
connecting first to the internet access point, downloading your data and then connecting to the D2
access point, you will be certain to be working with current, most up-to-date information in your iPad
application.
In addition, many iPad applications require an internet connection in order to be able to complete
fundamental tasks such as creating a flight plan. If the internet connection is via Wi-Fi, the user will
need connect to the internet access point to complete these tasks before connecting to D2 for the flight.
The implication also is that in-flight it may be impossible to create or change a flight plan or obtain
current weather information due to lack of an available internet connection. As is stated in the
documentation of all applications reviewed, the pilot in command must not use these applications as
a primary flight display and only as supplemental information.
If the application allows the iPad tablet device to sleep, it is possible that when it awakes it will connect
to another access point and AHRS information display will be suspended until the D2 is reconnected to
the tablet as described below.
If the D2 is allowed to sleep through inactivity timeout or power loss from external sources, the iPad
device will try to connect to some other access point and will need be reconnected once the D2 is
powered back up unless the D2 is the only access point available.
The D2 supports both UDP protocol and TCP protocol as required by AHRS-enabled applications. The
benefit of applications that use UDP protocol is that multiple tablet devices (up to 5) can connect
simultaneously to the D2 and obtain the D2 AHRS data stream. If any application connects with TCP, the
data stream will be taken over by that application until it disconnects or is terminated at which time
UDP applications be able to receive the data stream automatically.