Ok changed the code.now the code is int
app_main(void)
{
char *a="";
/* Initialize NVS — it is used to store PHY calibration data */
esp_err_t ret = nvs_flash_init();
printf("one");
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
ESP_ERROR_CHECK(nvs_flash_erase ...

Hello there,
in my example i am doing wifi scan. after i get the result. i want to start wifi enterprise or bluetooth but during deinit the above error is coming.Codebox=text file=Untitled.txt]void task(void *pvParameter) {
while(1){
vTaskDelay(4000/portTICK_PERIOD_MS);
ESP_ERROR_CHECK(esp_wifi ...

I did some workaround. now problem is solved

is this the problem?

static int
gatt_svr_chr_access_sec_test(uint16_t conn_handle, uint16_t attr_handle,
struct ble_gatt_access_ctxt *ctxt,
void *arg)
{
const ble_uuid_t *uuid;
int rc=0;
// uint8_t dats[50]={0};
uuid = ctxt->chr->uuid;
assert (0);
if (ble_uuid_cmp(uuid, &gatt_svr_chr_sec_test_static_uuid.u ...

i saw it in build file. symbol _n couldnot resolved.

which code i should check for unrecognised variable?

I am using BLPPRPH example. I have modified the example as i wanted to send and recieve the data. Compilation goes ok. but when esp32 starts I (631) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
state=1I (2655) BTDM_INIT: BT controller compile version ...

I deleted the other thread.

Yes it is already initiallized