I know I can send a packet with data length 1~20 using sd_ble_gatts_hvx(), then how to send an empty notification packet(data length 0)?

Question

Hi,
I am using nrf51822 (128k).
Softdevice 6.0 (s110), SDK 5.2.
How can I send an empty notification packet (data length 0) to master device?
If I send a packet with data length 0, nrf51822 reset... 
 Thank you.

Pål Håland · Accepted Answer

Hi 
 If you would like to send an empty notification, the hvx_params have to be something like this: 
 unit8_t buffer[20], len=0;

hvx_params.p_data = &buffer[0];
hvx_params.p_len = &len;
hvx_params.offset = 0;
hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
hvx_params.handle = 0x000F

sd_ble_gatts_hvx(gs_conn_handle, &hvx_params);

I know I can send a packet with data length 1~20 using sd_ble_gatts_hvx(), then how to send an empty notification packet(data length 0)?

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