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Android™ Controlled LED Driver using pfodApp™
A Tutorial Part 2 - pfodApp™ Android™ Mobile Phone application

by Matthew Ford 21st August 2012 (original 21st December 2010)
© Forward Computing and Control Pty. Ltd. Ltd. NSW Australia
All rights reserved.

Intoduction to pfodApp™ – the Mobile Phone Application

Part 1 of the tutorial introduced pfodDevices™ and the covered the specification of the operation discovery protocol. This part of the tutorial introduces pfodApp for Android. This application can be used to control any pfodDevice™ that has a bluetooth/serial connection. This is what makes this mobile phone application so useful. It is the pfodDevice™ that tells the phone what functionality is available. The phone then just displays the commands and lets you choose.

Part 1 – Introduction to pfodAppsTM/pfodDevices™
Part 2 -- Intoduction to pfodApp™ – the Mobile Phone Application
Part 3 – Led Controller pfodDevice™ Messages
Part 4 – Coding the Led Controller pfodDevice™

Part 2 – Introduction to pfodApp – the Mobile Phone Application

pfodApp™ for Android™

The pfodApp for Android is available from the Android App store. There is also a free Demo version, pfodAppDemo, which demonstrates a selection of screens the pfodDevice can send for the pfodApp to display.

pfodApp – Setting up the Connections

Before you can connect to a pfodDevice via bluetooth using the pfodApp, you need to first pair the device with your mobile. Once you have paired the device, you can then start the pfodApp and give that device a meaningful name that will appear on the Connections list. See pfodAppForAndroidGettingStarted.pdf for detailed instructions.

Connecting to a Terminal Session on your PC

It is convenient, when developing the user interface for your pfodDevice, to connect the pfodApp to a terminal session on your PC so that you can design and test the micro-pages the pfodDevive will send for the pfodApp to display.

How to Make and Remove serial connections from your Mobile Phone to your PC describes a number of methods of making this connection for various operating systems.

That page also covers installing TeraTerm, the terminal emulator for Windows. If you are using a Mac or Linux you will need to install similar terminal software to connect to the Serial port provided by the USB serial Bluetooth card.

Connecting pfodApp™ to TeraTerm

You should start TeraTerm before connecting from your mobile phone pfodApp, because the pfodApp™ sends the getMainMenu message, {.}, immediately after the connection is established. On my Windows 7 computer, and the Android mobile would not make a connection if TeraTerm was not running and listening on assigned COM port.

Start the pfodApp™ on your mobile and connect to your PC.

The TeraTerm window shows the {.} message from the pfodApp. If you don't see the {.} and the pfodApp shows “Waiting for Response...”, then check that your terminal software is set to the same baud rate as the bluetooth COM port assigned to the mobile.


The pfodApp™ expects the pfodDevice™ to reply with its main menu of functionality. Type in the Main Menu response. Actually it is easier to type up the command in a text editor and then cut and paste it to the TeraTerm window because TeraTerm sends every character you type, immediately, including your typos. For example if you type


The pfodApp™ will display

The next section of this tutorial will cover defining the functionality of the pfod Led Controller and coding it into micro-controller.


pfodDevice™ and pfodApp™ are trade marks of Forward Computing and Control Pty. Ltd.


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