Sending Hexadecimal Values to my BLE device

Question

i used this function to send data to my ble device ble_nus_string_send.this function sends ASCII values. and when i pass this function hex values it converts them into ascii and then sends. But it terminates data when i pass 0x00 and for some other hex values this function doesn't work and just skip values. So how can i send hexadecimal values to my ble device through bluetooth.
i am using nrf51422 pca10028 kit with softdevice s110.

Anders Strand · Accepted Answer

Hi Nomi! 
 I am assuming that you are using the ble_app_uart example.
The conversion to ASCII does not happen inside the ble_nus_string_send(ble_nus_t * p_nus, uint8_t * p_string, uint16_t length) function.
It simply treats the p_string variable as a byte array, and does not care what it contains (value wise). 
 The issue is probably that your receiver device treats this byte array as a ASCII string, and for example terminates on a 0x00 value. 
 
 What is the receiver device? 
 Are you writing the receiving software yourself, or using a premade application?