CC2640R2F: Can't change advertised named in Project 0

Michael Bender

Part Number: CC2640R2F

I was playing around with the project 0 for the CC2640R2F launchpad. I modifed all the device info strings in devinfoservice.c and saw those take effect.

I tried editing the name from Project Zero R2 to My Project and then Project Zero R3 and neither took. I saw it was defined in project_zero.c and project_zero_soln.c. I changed it in both locations. I also cleared all cache and data for bluetooth and bluetooth scanner (on android / google pixel). I don't know why there is both a project_zero and project_zero_soln or what one is for vs. the other. But I'm confused as to why a simple string update would not take and want to get that resolved before I keep hacking away trying to get what I need to work.

over 8 years ago

0 JXS over 8 years ago

TI__Guru** 105180 points

Hello Michael,

Specifically, which string did you modify? Some handsets look at the GAP Device Name and only update the name in the "found devices" list after they form a connection. After a connection has been formed, they ignore the name in the Scan Response, even if you clear the BT cache.

One trick is to set a 2nd BDADDR using SmartRF Flash Programmer 2. This will "trick" the phone into thinking it's a new device that it has never seen before.

Best wishes

0 Michael Bender over 8 years ago in reply to JXS

Prodigy 20 points

Thanks for the response. I set this line.

```
/ GAP GATT Attributes
static uint8_t attDeviceName[GAP_DEVICE_NAME_LEN] = "Project Zero R3";
```

I'll look into the SmartRF Flash Programmer 2 option. I don't know what that is.

0 Katie Pier over 8 years ago in reply to Michael Bender

TI__Guru* 82311 points

Hi Michael,

When I just tried this on my Project Zero, I actually changed the string in a different location and it seemed to work well. What I changed was in the project_zero.c where there is declared static uint8_t advertData[]. I changed the string and, if necessary, also changed the length, for example:

// GAP - Advertisement data (max size = 31 bytes, though this is
// best kept short to conserve power while advertisting)
static uint8_t advertData[] =
{
  // Flags; this sets the device to use limited discoverable
  // mode (advertises for 30 seconds at a time) or general
  // discoverable mode (advertises indefinitely), depending
  // on the DEFAULT_DISCOVERY_MODE define.
  0x02,   // length of this data
  GAP_ADTYPE_FLAGS,
  DEFAULT_DISCOVERABLE_MODE | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,

  // complete name
  14,   //changed from 16
  GAP_ADTYPE_LOCAL_NAME_COMPLETE,
  'K', 'a', 't', 'i', 'e', ' ', 'Z', 'e', 'r', 'o', ' ','R','2', // my new advert name

};

Looking at the code, I believe that later on in your code this value actually overwrites the array that you changed (there's a memcopy), and so if this was still at the default value I think this is why your change wasn't sticking.

Hope this helps!

Regards,

Katie

Bluetooth®︎

Bluetooth forum

CC2640R2F: Can't change advertised named in Project 0