Have been following the nordic tutorial to update characteristic value using hvx_params. Currently the structure for hvx_params is as follows:
/**@brief GATT HVx parameters. */
typedef struct
{
uint16_t handle; /**< Characteristic Value Handle. */
uint8_t type; /**< Indication or Notification, see @ref BLE_GATT_HVX_TYPES. */
uint16_t offset; /**< Offset within the attribute value. */
uint16_t *p_len; /**< Length in bytes to be written, length in bytes written after successful return. */
uint8_t *p_data; /**< Actual data content, use NULL to use the current attribute value. */
} ble_gatts_hvx_params_t;
And in the tutorial, the data to be updated is done by
hvx_params.p_data = (uint8_t*)new_value;
where p_data is in int. However, I want to pass string as the characteristic value to notify an android app using BLE.
My question is, is it possible to do so by changing the structure to:
char *p_data;
and also change to
new_value = "Hello there!";
hvx_params.p_data = new_value;
where new_value is in char* (a string).
If this is the wrong method, what should I do to pass string via BLE to the android app using notifications?
Thank you.
