[SOLVED] Random errors when starting BLE GATT server

[mforcen]

EDIT: in esp_ble_gatts_add_char, variable of type esp_attr_value_t must have an attr_len larger than 0.

Hi to all.
I made an example following the walkthrough example on gatt server which is found on Github.
Although it works properly (I mean, I can find my device on a BLE GATT scanner and read a value), some errors appeared through serial monitor. These errors are:

Code: Select all

CREATE_SERVICE_EVT, status 0, service_handle40
add char
E (784) BT: osi_mem_dbg_record invalid !!

E (784) BT: btc_gatts_arg_deep_copy 8 no mem

Service created successfully
E (794) BT: osi_mem_dbg_record invalid !!

ADD_CHAR_EVT, status 0, attr_handle 42, service_handle 40
E (794) BT: gatts_get_attribute_vaule failt:the value length is 0

These errors are produced within this code:

Code: Select all

case ESP_GATTS_ADD_CHAR_EVT:{
		uint16_t length = 0;
		const uint8_t *prf_char;
		printf("ADD_CHAR_EVT, status %d, attr_handle %d, service_handle %d\n",
				param->add_char.status, param->add_char.attr_handle, param->add_char.service_handle);
		nevera_profile.char_handler = param->add_char.attr_handle;
		nevera_profile.descr_uuid.len = ESP_UUID_LEN_16;
		nevera_profile.descr_uuid.uuid.uuid16 = ESP_GATT_UUID_CHAR_CLIENT_CONFIG;
		esp_err_t get_attr_ret = esp_ble_gatts_get_attr_value(param->add_char.attr_handle, &length, &prf_char);
		if(get_attr_ret == ESP_FAIL) printf("ILLEGAL HANDLE\n");
		printf("the nevera char length =%x\n", length);
		for(int i = 0; i < length; ++i)
			printf("prf_char[%x] = %x\n", i, prf_char[i]);
		esp_err_t add_descr_ret = esp_ble_gatts_add_char_descr(nevera_profile.service_handle, &nevera_profile.descr_uuid,
																ESP_GATT_PERM_READ, NULL, NULL);
		if(add_descr_ret)
			printf("add char descr failed, error code: %x\n", add_descr_ret);
		break;
	}

Any ideas?
Thanks in advance.