In components/lwip/api/sockets.c, line 437:



#if LWIP_SOCKET_SET_ERRNO
#ifndef set_errno
#define set_errno(err) do { if (err) { errno = (err); } } while(0)
#endif
#else /* LWIP_SOCKET_SET_ERRNO */
#define set_errno(err)
#endif /* LWIP_SOCKET_SET_ERRNO */



When "err" is 0, “set_errno(err ...

The problem is solved with the commit c26baeb610d2bb764d5d9c4cb02c83e4a28f327c.
Thanks for updating.

It works fine.
Thanks for your answer, Angus.

This is a sample that has been modified from the "blink":


/* Blink Example

This example code is in the Public Domain (or CC0 licensed, at your option.)

Unless required by applicable law or agreed to in writing, this
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR ...

The test program:


#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_wifi.h"
#include "esp_system.h"
#include "esp_event.h"
#include "esp_event_loop.h"
#include "esp_spi_flash.h"
#include "nvs.h"
#include "nvs_flash.h"

esp_err_t event_handler(void *ctx ...

Thanks for reply.

Yes, I do it with the latest esp-idf.

When I use NVS instead of EEPROM in arduino-esp32, a similar error occurs randomly.

So after DEBUG, found to be caused by spi_flash_* app. Wrote a simple test
program with ESP-IDF, that produces the same error. If not used WiFi is normal,
I ...

Error when using core 1 to test spi_flash_read:

void testTask(void *arg)
{
const uint32_t cpuid = (uint32_t) arg;
assert(cpuid == xPortGetCoreID());

vTaskDelay(100 / portTICK_PERIOD_MS);
const uint32_t sector = cpuid + 6;
const uint32_t n = SPI_FLASH_SEC_SIZE;
ets_printf("t%d\n", cpuid ...

When you complete the transmission of data, immediately pullup CS Pin, then the data transmission is not complete.
For example:

{
......

const char *hello = "Hello, world!";

chip_cs_low(); // pulldown cs pin
SPI.transferBytes((uint8_t *) hello, 0, strlen(hello)); // write "hello world ...

<esp32-hal-i2c.c>

On "i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, bool addr_10bit, uint8_t * data, uint8_t len, bool sendStop)"

while(len) {
cmdIdx = (index)?0:2;
willRead = (len > 32)?32:(len-1);
if(cmdIdx){
i2cResetFiFo(i2c);
}

+ if (willRead) {
i2cSetCmd(i2c, cmdIdx++, I2C_CMD ...