BlueNRG-2 cannot add new characteristics and services

[J.C]

I use the sample program to copy a program, but it doesn't work, the error code is 0x47

How do achieve new characteristics and services?

[amankumbhani]

Hi,

Have you tried increasing the MIN_NUM_LINK_CONF, NUM_APP_GATT_SERVICES_CONF and NUM_APP_GATT_CHAR_ATTRIBUTES_CONF macros under SerialPort_config.h?

It had solved the issue for me.

[J.C]

Thank you for your prompt reply,

I use the ST supply version 3.2.2 of the "BLE_SerialPort_Master_Slave" project. I try modify gatt_db.c add new characteristics UUID,

but did not succeed, system appears error code is "0x47", 

After I reference the "PM0257" document and found I do not modify several parameters in SerialPort_config.h, such as 

"NUM_APP_GATT_SERVICES",

"NUM_APP_GATT_ATTRIBUTES",

"ATT_VALUE_ARRAY_SIZE", 

other the "gatt_db.c" service API "aci_gatt_add_service" fourth parameter must write the right value can create UUID and work on.

Final attached my result:

[amankumbhani]

Hi @元�? 鄭​,

Here is an example of how you can add services. In the below example, I am adding a battery service & a serial port service (this is the service that is already provided in the example code), under gatt_db.c.

/* Serial port TX (notification), RX(write without response) characteristics definition */
 
static const ble_gatt_chr_def_t serial_port_chars[] = {
 {
  .properties = BLE_GATT_SRV_CHAR_PROP_NOTIFY,
  .permissions = BLE_GATT_SRV_PERM_NONE,
  .min_key_size = BLE_GATT_SRV_MAX_ENCRY_KEY_SIZE,
  .uuid = BLE_UUID_INIT_128(TX_CHR_UUID),
  .descrs = {
   .descrs_p = &BLE_GATT_SRV_CCCD_DEF_NAME(tx),
   .descr_count = 1U,
  },
 },
 {
  .properties = BLE_GATT_SRV_CHAR_PROP_WRITE | BLE_GATT_SRV_CHAR_PROP_WRITE_NO_RESP,
  .permissions = BLE_GATT_SRV_PERM_NONE,
  .min_key_size = BLE_GATT_SRV_MAX_ENCRY_KEY_SIZE,
  .uuid = BLE_UUID_INIT_128(RX_CHR_UUID),
 },
};
 
/* Serial port Service definition */
static const ble_gatt_srv_def_t serial_port_service = {
  .type = BLE_GATT_SRV_PRIMARY_SRV_TYPE,
  .uuid = BLE_UUID_INIT_128(SRVC_UUID),
  .chrs = {
    .chrs_p = (ble_gatt_chr_def_t *)serial_port_chars,
    .chr_count = 2U,
  },
};
 
uint8_t battery_level_value = 20;
ble_gatt_val_buffer_def_t battery_level_val_buff = {
 .buffer_len = 1,
 .buffer_p = &battery_level_value,
};
 
ble_gatt_chr_def_t batt_level_chr = {
 .properties = BLE_GATT_SRV_CHAR_PROP_READ,
 .permissions = BLE_GATT_SRV_PERM_NONE,
 .uuid = BLE_UUID_INIT_16(0x2A19),
 .val_buffer_p = &battery_level_val_buff,
};
 
ble_gatt_srv_def_t battery_level_srvc = {
 .type = BLE_GATT_SRV_PRIMARY_SRV_TYPE,
 .uuid = BLE_UUID_INIT_16(0x180F),
 .chrs = {
  .chrs_p = &batt_level_chr,
  .chr_count = 1,
 },
};
 

And here are the macros that are changed under SerialPort_config.h:

/* Default number of link */
#define MIN_NUM_LINK_CONF                10
 
/* Number of services */
#define NUM_APP_GATT_SERVICES_CONF  (10)       /* attributes for serial port service */
 
/* Number of characteristics attributes requests */
#define NUM_APP_GATT_CHAR_ATTRIBUTES_CONF (10) /* attributes for serial port service characteristics */

You can try to copy paste this and check if there are two new services added.

Let me know if it helps.

Thanks.