About this app

Codan XTEND allows you to operate a Codan HF SDR radio via your smartphone or tablet. This provides you with additional mobility, and an easy-to-use interface.

It allows you to perform the following for pre-defined contacts that are programmed into your radio:
- Make and receive Selective and Emergency HF voice calls
- Send and receive HF messages (including in-link messages)
- Send your position to another radio, or request the position of another radio, and view these positions in Google Maps (using cached maps if internet access is not available)
- Manually test an HF channel (Selcall only)
- Make and receive phone calls over an HF network via a 3033 Telephone Interconnect (https://www.codancomms.com/products/3033-telephone-interconnect/)
- Send and receive SMSes over an HF network via a SprintNet gateway (https://www.codancomms.com/products/sprintnet/)
- Send and receive SMSes and Web Messages over a cellular or satellite link via Codan Convoy

It allows you to use any voice encryption method supported by your radio, including Digital Voice at 2400, 1200, 600, 480 and 300 bps.

Your device, running the Codan XTEND app, can connect to your radio via a Codan Envoy SmartLink (https://www.codancomms.com/products/smartlink/) or via another Wi-Fi router. Access to the radio can be controlled by use of a user PIN, in addition to the standard Wi-Fi security mechanisms.

In combination with the Sonim XP7700 smartphone, the app allows you to use the familiar physical PTT button as per the Envoy or Sentry handset.

Up to a total of four smartphone devices, or standard control points (e.g. Envoy handsets/consoles or Sentry handsets) may be connected to your radio at once, although responsiveness and audio quality may be reduced if multiple smartphone devices are connected to your radio via Wi-Fi in an environment where there are a number of other active Wi-Fi hotspots.

Your radio must have the "15-10622 Opt Standard App" Sales Option enabled to allow use with Codan XTEND. Other features mentioned above may also be dependent on the Sales Options that are enabled in your radio.

New features

Support for Android 13
Support for DES-56 encryption
General fixes to support current Android version

Some devices may experience radio disconnection while the screen is locked. To avoid (example below for Samsung):
o Disable adaptive battery
o Disable put unused app to sleep
o Enable unrestricted usage of battery

Some devices may not show call notifications when the app is opened from background. To avoid (example below for Samsung):
o Enable window overlay permissions

App Permissions

Allows an application to record audio.
Allows an application to modify global audio settings.
Allows applications to open network sockets.
Allows applications to access information about networks.
Allows applications to access information about Wi-Fi networks.
Allows applications to change Wi-Fi connectivity state.
Allows an application to collect battery statistics
Allows an application to write to external storage.
Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
Allows an application to read from external storage.
Permission an application must hold in order to use ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS.
Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.
Allows access to the vibrator.
Allows an app to create windows using the type TYPE_APPLICATION_OVERLAY, shown on top of all other apps.