AoA using Android 4.2

Heide264 · February 16th, 2013, 04:52 PM

Has anybody had luck using this books implementation of AoA using Android 4.2?

I believe the newer AoA2.0 (libraries-v2 directory) libraries for arduino are required.

Using the steps followed in the book (and the library directory suggested by the author), I have replaced usb.powerOn() in the setup loop with usb.begin(). The sketch compiled and loaded okay on my ArduinoADK, but when connected to my phone nothing happened - either with USB debugging on or off.

I attempted to use the newer v2 libraries, but they are significantly more complicated at first glance.

Any thoughts? I was hoping this book would clear up these issues, as these were the issues I was having earlier when attempting to use AoA. I would be extremely disheartened if the AoA implementation used is not compatible with the latest android software considering the recent publishing date.

cmassicot · February 20th, 2013, 10:20 AM

I also tried the temperature sensor example with a Nexus 7 tablet running Android 4.2.1.

In the Arduino Application, I also replaced the usb.powerOn() line by usb.begin(), I can successfully build and upload the Arduino Application.

I rebuilt the t.apk function with Eclipse with API 17 (Android 4.2)

here is the log from Eclipse when the application is downloaded
[2013-02-20 08:55:55 - Temperature Sensor] ------------------------------
[2013-02-20 08:55:55 - Temperature Sensor] Android Launch!
[2013-02-20 08:55:55 - Temperature Sensor] adb is running normally.
[2013-02-20 08:55:55 - Temperature Sensor] No Launcher activity found!
[2013-02-20 08:55:55 - Temperature Sensor] The launch will only sync the application package on the device!
[2013-02-20 08:55:55 - Temperature Sensor] Performing sync
[2013-02-20 08:55:55 - Temperature Sensor] Uploading Temperature Sensor.apk onto device '015d25687a202015'
[2013-02-20 08:55:56 - Temperature Sensor] Installing Temperature Sensor.apk...
[2013-02-20 08:55:57 - Temperature Sensor] Success!
[2013-02-20 08:55:57 - Temperature Sensor] \Temperature Sensor\bin\Temperature Sensor.apk installed on device
[2013-02-20 08:55:57 - Temperature Sensor] Done!

Is there a way to start the temperature sensor application Manually?

Thanks

cmassicot

Heide264 · February 20th, 2013, 10:41 AM

Quote:

Originally Posted by cmassicot

I rebuilt the t.apk function with Eclipse with API 17 (Android 4.2)

[2013-02-20 08:55:57 - Temperature Sensor] \Temperature Sensor\bin\Temperature Sensor.apk installed on device
[2013-02-20 08:55:57 - Temperature Sensor] Done!

Is there a way to start the temperature sensor application Manually?

I did not think of the error being on the android application side. I had assumed it was due to the tablet not recognizing the older AoA libraries.

The developer for the temperature application must have chosen to leave the launcher action out, so you can't launch it as a normal application. I assume that it only launches when it detects an android accessory with the details the author has entered in the Arduino code (make/model/etc).

I will have to dig through the android code a bit when I have some time and verify it matches up with the information in the arduino code. Been pretty busy, but will see if I can dig through it.

cmassicot · February 21st, 2013, 10:44 AM

I just recompiled the Arduino application with the USBHost libraries provided by the author and the temperature sensor example worked immediately.

here is a link to the library.

https://github.com/cmassicot/P2PMQTT..._Libraries.git

cmassicot

Heide264 · February 21st, 2013, 10:54 AM

Quote:

Originally Posted by cmassicot

I just recompiled the Arduino application with the USBHost libraries provided by the author and the temperature sensor example worked immediately.

here is a link to the library.

https://github.com/cmassicot/P2PMQTT..._Libraries.git

cmassicot

Recompiled the Arduino side... not the android side, correct?

I'll take a look at the library when I have some time, I appreciate it.

cmassicot · February 21st, 2013, 11:00 AM

Actually I recompiled both Arduino and Android code.

I recompiled the Arduino with the latest libraries provided and recompiled the temperature sensor project Android code with API 17.

The only thing that I modified in the Arduino code was the line usb.begin Android code, it currently runs on Android 4.2.2

cmassicot

Heide264 · March 6th, 2013, 10:11 PM

I found my issue, regardless of if I recompiled the android code to a newer SDK version.

After adding a few serial.print commands in my arduino code, I found that the board was not accepting my protocol version of my nexus 7 tablet. Digging through the AndroidAccessory.cpp file, I made the following modification:

Code:

bool AndroidAccessory::switchDevice(byte addr)

{
int protocol = getProtocol(addr);

if (protocol == 1) {
     Serial.print(F("device supports protcol 1\n"));
     } 
else if (protocol == 2) {
     Serial.print(F("device supports protocol 2\n"));
     }
else {
     Serial.print(F("could not read device protocol version\n"));
     return false;
     }

Since the newer devices will return a "2" when they support AoA 2, it is required to allow the old libraries to accept a 2, as opposed to only a 1.