Ble data sending with nrf52 - c

Question

I am working with nrf52 and I made a custom service for 17 bytes data array and I want to send it but it gives fatal error while in data update (sending) function and resets the program.
Here's my custom service data update function:
uint32_t ble_cus_mydata_update(ble_cus_t * p_cus, uint8_array_t mydata, uint16_t conn_handle)
{
if (p_cus->conn_handle != BLE_CONN_HANDLE_INVALID)
{
ble_gatts_hvx_params_t params;
memset(&params, 0, sizeof(params));
params.type = BLE_GATT_HVX_NOTIFICATION;
params.handle = p_cus->mydata_char_handles.value_handle;
params.p_data = &mydata;
params.p_len = 17;
return sd_ble_gatts_hvx(conn_handle, &params);
}}
and i send data with timeout_handler
static void mydata_timeout_handler(void * p_context)
{
ret_code_t err_code;
UNUSED_PARAMETER(p_context);
bsp_board_led_on(2);
nrf_delay_ms(100);
bsp_board_led_off(2);
uint8_array_t mydata_value [17] = {0x55,0x10,0x01,0x23,0x99,0xFF,0xFF,0xCC,0xBB,0x00,0x00,0x00,0x00,0x00,0x24,0x24,0x20};
err_code = ble_cus_mydata_update(&m_cus, *mydata_value , 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_HANDLER(err_code);
}
}
And here is my service char add
uint8_array_t mydata_char_init_value [17] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
memset(&add_char_params, 0, sizeof(add_char_params));
add_char_params.uuid = MYDATA_CHAR_UUID;
add_char_params.uuid_type = p_cus->uuid_type;
add_char_params.init_len = 17;
add_char_params.max_len = 17;
add_char_params.p_init_value = mydata_char_init_value;
add_char_params.char_props.read = 1;
add_char_params.char_props.notify = 1;
add_char_params.read_access = SEC_OPEN;
add_char_params.cccd_write_access = SEC_OPEN;
err_code = characteristic_add(p_cus->service_handle,
&add_char_params,
&p_cus->mydata_char_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
I get an error:
nrf error_code= 0x2000310c
There is no info about this error message; it throws this fatal error and goes to nrf_breakpoint_cond after error handler and resets itself.
Please help me; I tried everything I know and I can't move forward. Thanks in advance to whomever tries to help me.

Answer 1

i solved it and wanted to help others who might need it its a little different this code is for sending 4 bytes of data you need to do a little changes for 17 bytes but its not that much the other codes are same you just need to change update function to something like this
uint32_t ble_cus_pres_level_update(ble_cus_t * p_cus, uint32_t presvalue)
{
// NRF_LOG_INFO("In ble_cus_presvalue_update. \r\n");
if (p_cus == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code = NRF_SUCCESS;
ble_gatts_value_t gatts_value;
// Initialize value struct.
memset(&gatts_value, 0, sizeof(gatts_value));
gatts_value.len = sizeof(uint32_t);
gatts_value.offset = 0;
gatts_value.p_value = &presvalue;
// Update database.
err_code = sd_ble_gatts_value_set(p_cus->conn_handle,
p_cus->bme280_presvalue_char_handles.value_handle,
&gatts_value);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Send value if connected and notifying.
if (p_cus->conn_handle != BLE_CONN_HANDLE_INVALID)
{
ble_gatts_hvx_params_t params;
memset(&params, 0, sizeof(params));
params.type = BLE_GATT_HVX_NOTIFICATION;
params.handle = p_cus->bme280_presvalue_char_handles.value_handle;
params.offset = gatts_value.offset;
params.p_data = gatts_value.p_value;
params.p_len = &gatts_value.len;
err_code = sd_ble_gatts_hvx(p_cus->conn_handle, &params);
// NRF_LOG_INFO("sd_ble_gatts_hvx result: %x. \r\n", err_code);
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
// NRF_LOG_INFO("sd_ble_gatts_hvx result: NRF_ERROR_INVALID_STATE. \r\n");
}
return err_code;
}

Answer 2

Shouldn't err_code = ble_cus_mydata_update(&m_cus, *mydata_value , m_conn_handle); be err_code = ble_cus_mydata_update(&m_cus, mydata_value , m_conn_handle);?