NOTE: this is not a general solution and might not work on every phone or future version of the DKs, but it is still a great way for any prototyping purposes

Unfortunately the SDK currently only supports a small set of the Bluetooth stack. As we wanted to integrate some of our hardware gadgets (over SPP/RFCOMM) with our Dev Phone 1, we needed to digg a little deeper. So here is what you want to do to get it working.

1) Follow the great article by Stephan, to get all the necessary libraries in place. His Bluescan app also provides a good starting point both for SDK and NDK integration.

2) Adapt the NDK specific code to talk to your device.

First allocate a socket

s = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);

Next you need to set who to connect to

struct sockaddr_rc addr1 = { 0 };
char dest[18] = "00:06:66:02:9D:39"; //Device ID of your Bluetooth device
addr1.rc_family = AF_BLUETOOTH;
addr1.rc_channel = (uint8_t) 1;
str2ba( dest, &addr1.rc_bdaddr );

Now you can connect to the device

status = connect(s, (struct sockaddr *)&addr1, sizeof(addr1));

Thats pretty much it, you can start sending and receiving stuff with

if( status >= 0 ) {
  __android_log_write(ANDROID_LOG_INFO,"SPP_COMM","Successfully connected");
 
  status = write(s, "L1\r\n", 4);
 
  sleep(1);
 
  len1 = recv(s,buf,sizeof(buf),0);
  if(len1 > 0) 
    __android_log_write(ANDROID_LOG_INFO,"SPP_COMM",buf);
  else
    __android_log_write(ANDROID_LOG_ERROR,"SPP_COMM","Nothing was received from the device");
}

HTH
Enjoy
J.

1. Include log.h in your source files

#include <android/log.h>

2. Be sure to add llog to your LOCAL_LDLIBS in the Android.mk file of your NDK code

LOCAL_LDLIBS := -llog

Now you are ready to log to logcat from you NDK code, simply via

__android_log_write(ANDROID_LOG_ERROR,"Tag","Message");

Further loglevels are

typedef enum android_LogPriority {
    ANDROID_LOG_UNKNOWN = 0,
    ANDROID_LOG_DEFAULT,    /* only for SetMinPriority() */
    ANDROID_LOG_VERBOSE,
    ANDROID_LOG_DEBUG,
    ANDROID_LOG_INFO,
    ANDROID_LOG_WARN,
    ANDROID_LOG_ERROR,
    ANDROID_LOG_FATAL,
    ANDROID_LOG_SILENT,     /* only for SetMinPriority(); must be last */
} android_LogPriority;

all the other stuff you can look up under

 build/platforms/android-1.5/common/include/android/log.h

HTH

Enjoy
J.

After unboxing I started the upgrade process, and as there of course were some minor complications I will outline the detailed steps here.

1. Go to the HTC Page and download the newest Radio and Recovery Image, place them wherever you want just be sure they stay the zip they are meant to be.

2. Connect your Android Phone to your Mac and do not mount the SD Card.

3. Check if your device is connected by using

adb devices

4. Copy the Radio image to the SD Card by using

adb push <radioimagename>.zip /sdcard/update.zip

5. Be sure it is copied by using

adb shell sync

after this is returned everything is done.

The next step is to turn your Phone of by holding down the power button. After its turned of hold down the home button and turn it on again. Some moments after the android sign a ! accompanied by a triangle should appear now your are in recovery mode. Slide out the keyboard and press ALT + L, you now should see the recovery console. Now press ALT + S and you should see some command verifying the package etc… and a progress bar. After that press the Home and Back button (just press do not hold) to reboot the device, note only if you do exactly so the new radio image will be installed. It will display another Image (arrow and a chip) and reboot the system to normal mode after it is done.

Now you are half way through just repeat the steps above with the Recovery Image and you are done