How to Create an HID mouse application using nRF52DK board and few extra buttons?

[hari911]

Hi,

I have gone through the "ble_app_hids_mouse" example program. So far the program seems to work great, but how do we take control of the buttons since the function used only translates button press to mouse x-y translations. Please hep. Later i would try using a joystick to control the mouse movements and two buttons to control mouse left and right button functionality.

But before that i need to get through the basics first. Please help me get this stuff working.

[Sigurd]

Hi,

This post here shows you how to add this functionality. 

The function updated to SDK 15 looks like this:

static void mouse_click_send(uint8_t x, uint8_t y, uint8_t z) 
{ 
    uint32_t err_code; uint8_t buffer[3]; 
    if (m_in_boot_mode) return; 

    buffer[0] = x; // Left button (bit 0) pressed
    buffer[1] = y; // Scroll value (-127, 128)
    buffer[2] = z; // Sideways scroll value (-127, 128)

    err_code = ble_hids_inp_rep_send(&m_hids,INPUT_REP_BUTTONS_INDEX, INPUT_REP_BUTTONS_LEN, buffer,m_conn_handle);
    if ((err_code != NRF_SUCCESS) &&
        (err_code != NRF_ERROR_INVALID_STATE) &&
        (err_code != NRF_ERROR_RESOURCES) &&
        (err_code != NRF_ERROR_BUSY) &&
        (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
       )
    {
                    APP_ERROR_CHECK(err_code);
    }
}

Here is the list of values:

0x00 - No buttons pressed

0x01 - Left button pressed

0x02 - Right button pressed

0x03 - Both left and right button pressed

To make a left click you call mouse_click_send(1,0,0); don't forget to release the key press by calling: mouse_click_send(0,0,0);

You can test this on with button 4 (BSP_KEY_3) in bsp_event_handler() function like this:

case BSP_EVENT_KEY_3:
if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
{
//mouse_movement_send(0, MOVEMENT_SPEED);
mouse_click_send(1,0,0); //Click
mouse_click_send(0,0,0); //Release
}