BlueNavtex2 Android app

Free app available on the Google Play Store:

What is Navtex?

Navtex is an international standard system for broadcasting maritime information using VHF TTY. Messages include weather forecasts and warnings, shipping hazards, and SAR information.

How does this App access the data?

Nasa Marine Ltd (nasamarine.com) manufacture a Navtex receiver engine which incorporates a bluetooth 4 (BTLE) interface, designated BT-3. The BlueNavtex2 app was developed to interface to Nasa Marine's device.

The Nasa device receives and stores all Navtex messages within range, typically a couple of day's-worth. It operates on 518 or 490KHz at any one time, dependant on manual selection or by the programmable timer function. You can retrieve an index to the stored messages and view/filter them using the app while connected to the device.

Mobile device requirements:

Smartphone or tablet with Adroid 4.3 upwards and bluetooth 4.  Note that having LOCATION switched on is an operating system (Android 6 upwards) requirement for using BTLE, although the app does not use it or incorporate any form of tracking system.

Customised parameters supported by the app:

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BlueBM Android app

Free app available on the Google Play Store:

Nasa Marine Ltd (nasamarine.com) manufacture a battery monitor intended primarily at the leisure marine market, though there are other possible applications such as motor homes. Data collected includes present voltage levels of the service and starter batteries, plus charge/discharge periods for the service battery estimated from the  amps currently flowing . The device uses a shunt inserted in the main service battery connection and is normally located in the boat's battery compartment

The bluetooth-enabled version of this device (designated BM-1) outputs data on request from the app via a bluetooth 4 (BTLE) wireless link.

Your Android device must be 4.3 or higher and support bluetooth 4.

Customised parameters required by the app:

Your boat name or other 8-char ID to identify and connect your BM -1 device

Service battery capacity and typical ambient temperature for calculations.

Data displayed by the app:

This is not a continuous use system. Although the BM device runs 24/7 the wireless link needs to be disconnected after use, so exit the app when done.

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