is multi touch HID possible with nrf51822 chip?

[akash naidu]

Hi All,

       Currently i am working on nrf51822 for multi touch HID.For that i have chosen mouse HID example as a reference, in which i have changed HID descriptor(single touch) and some other things.So, that single touch has been working.

And, if i changed the HID descriptor for multi touch, touch devices(touch laptop) were showing "Bluetooth driver error".

is it possible multi touch HID over nrf51822 as a reference of mouse HID example?

if possible, what all changes are to be required to work for multi touch.

so, please guide me how to implement multi touch HID over nrf51822.

regards

akash.

[ovrebekk]

Hi Akash

Sorry about that, I should probably have shared the SDK version with you ;)

I used the latest one, SDK v15.2.0. 

Best regards
Torbjørn

[akash naidu]

Hi Ovrebekk

Thanks for sharing SDK version.

When i have downloaded and test it on nrf52DK, i am getting following logs...

<info> app: HID Mouse example started.
<info> app: m_whitelist_peer_cnt 1, MAX_PEERS_WLIST 8
<info> app: Fast advertising.
<info> app: Connected
<error> app: Fatal error
<warning> app: System reset

Once connection has been established with Android mobile, then i am pressing button 4 for sending report.

When i have pressed Button 4, was getting Fatal error.

I have edited mouse example.

could you please tell me what i have done wrongly?

Best Regards,

Akash 

[ovrebekk]

Hi Akash

What compiler are you using?

Which Android phone are you testing on?

Best regards
Torbjørn

[akash naidu]

Hi Ovrebekk

I am using IAR C/C++ Compiler for ARM

Redmi notepad 2.

[ovrebekk]

Hi Akash

I also get an error now when trying to send data. The error I get is 0x3401, which is the 'system attributes missing' error. 

This is interesting, as I can't remember seeing this issue before. 

I need some more time to investigate this, but one quick workaround that allows me to send packets is to disconnect the device from the phone and reconnect after you have paired it for the first time. (The easiest way to do this in Android is simply to disable Bluetooth after you first paired, and enable it again. Double check the log from the kit to make sure it disconnects and reconnects.)

After you have connected for the second time the system attributes should be properly set, and you should be able to send packets without the error occurring. 

Best regards
Torbjørn