ESP32 Forum

I am not sure, but ever since I downloaded and upgraded the firmware on 11/26/17 and have not been able to run the WiFi AP example that I ran before.
I downloaded the newer API because of the issue I was having with fat.h header file being recognized but now I am having problems with setting up WiFi in AP mode.
I also reloaded the tool chain and ran git upgrade recursive.

The error happens when calling esp_wifi_init(&wifi_init_config)
The application compiles and runs but keeps resetting.

Below is a listing showing a backtrace before restarting:

D (241) tcpip_adapter: call api in lwip: ret=0x0, give sem
D (241) tcpip_adapter: check: remote, if=1 fn=0x401180bc
0x401180bc: tcpip_adapter_set_ip_info_api at C:/msys32/home/johnk/esp/esp-idf/components/tcpip_adapter/tcpip_adapter_lwip.c:1065


D (251) tcpip_adapter: check: local, if=1 fn=0x40117db4
0x40117db4: tcpip_adapter_dhcps_start_api at C:/msys32/home/johnk/esp/esp-idf/components/tcpip_adapter/tcpip_adapter_lwip.c:1065


D (251) tcpip_adapter: dhcp server re init
D (261) tcpip_adapter: call api in lwip: ret=0x0, give sem
D (261) tcpip_adapter: check: remote, if=1 fn=0x40117db4
0x40117db4: tcpip_adapter_dhcps_start_api at C:/msys32/home/johnk/esp/esp-idf/components/tcpip_adapter/tcpip_adapter_lwip.c:1065


ESP_ERROR_CHECK failed: esp_err_t 0x1101 at 0x40106c32
0x40106c32: app_main at C:/msys32/home/johnk/blink/main/wifi_ap.c:163 (discriminator 1)

file: "C:/msys32/home/johnk/blink/main/wifi_ap.c" line 163
func: app_main
expression: esp_wifi_init(&wifi_init_config)

Backtrace: 0x4008798c:0x3ffbabc0 0x40087cf9:0x3ffbabe0 0x40106c32:0x3ffbac00 0x400d0e96:0x3ffbad00
0x4008798c: invoke_abort at C:/msys32/home/johnk/esp/esp-idf/components/esp32/panic.c:572

0x40087cf9: _esp_error_check_failed at C:/msys32/home/johnk/esp/esp-idf/components/esp32/panic.c:584

0x40106c32: app_main at C:/msys32/home/johnk/blink/main/wifi_ap.c:163 (discriminator 1)

0x400d0e96: main_task at C:/msys32/home/johnk/esp/esp-idf/components/esp32/cpu_start.c:456


Rebooting...

What is the statement at line 163?

C:/msys32/home/johnk/blink/main/wifi_ap.c:163

159 ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
160
161 // initialize the wifi stack in AccessPoint mode with config in RAM
162 wifi_init_config_t wifi_init_config = WIFI_INIT_CONFIG_DEFAULT();
163 ESP_ERROR_CHECK(esp_wifi_init(&wifi_init_config));
164 ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
165 ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));

@Kolban
This code is from http://www.lucadentella.it/2017/05/20/e ... ess-point/ tutorial
https://github.com/lucadentella/esp32-t ... .projbuild
I had downloaded it in the past and it ran with no problems. After reloading the API and toolchain, I was planning on using it as a base to build a web server but found it would no longer run.

The macro ESP_ERROR_CHECK calls an ESP32 function and if the result is **not** ESP_OK, it throws an exception. Unfortunately, it doesn't log what the exception is. Personally, because of this, I have stopped using ESP_ERROR_CHECK and instead code as:
That way I can see the underlying error code.

If you wish to paste bin the full application (assuming it is relatively simple), I for one would compile it on my environment and see if I can recreate.

Two common fixes are add nvs_flash_init at beginning of program and erase flash to get rid of old calibration data

Update:
I opened another archived WiFi_AP applications that used to run and it also fails at the same place:
line 30 - wifi_init_config_t wifi_init_config = WIFI_INIT_CONFIG_DEFAULT();
line 31 - ESP_ERROR_CHECK(esp_wifi_init(&wifi_init_config));
I am using API Ver 3.0 because of issues with 2.1. but it looks like I traded one set of problems for another.
I don't know if the API is broken or if there is a document somewhere explaining what I need to change.

Did you read my post?

@kolban
"re: did you read my post."
No, sorry. Too busy writing not not enough reading
Thank you for the suggestion. My post before this talked about my second application also failing at the same point. It was not wrapped in the ESP_ERROR_CHECK you wrote about.

I did change my code per your suggestion and got the following:
********
E (271) err: Error with esp_wifi_init: 4353
abort() was called at PC 0x40106c46 on core 0
0x40106c46: app_main at C:/msys32/home/johnk/blink/main/wifi_ap.c:166 (discriminator 1)
*******
Not smart enough to know what it means, hopefully someone else does.

Per your request of the sample code:
It can be found Lucadentella's Github site at:
https://github.com/lucadentella/esp32-t ... ccesspoint
This if from his tutorial at:
http://www.lucadentella.it/en/2017/05/2 ... ess-point/
His code did work before I upgraded the API to:
I (34) boot: ESP-IDF v3.0-dev-1327-g02304ad8-dirty 2nd stage bootloader
Should I also be posting this as a pull request on esp-idf Github also to get the attention of Rudi or others?
Do the people at Rudi's level read this forum much or is it mainly a community forum?
I don't know proper protocol for if, when and how to do such things.
Thanks,

Thanks

Based on the error code returned (4353) and also based on Mr WiFive suggestion (his posts are short but don't underestimate his insight) see the following:

https://github.com/espressif/esp-idf/issues/1328

As Mr WiFive says, and as the other issue alludes to, it appears that the solution is to initialize NVS ... see:

nvs_flash_init();

If that indeed does work, you might want to raise an issue here https://github.com/lucadentella/esp32-tutorial/issues to have the author examine his source and see if a change is needed to help future users.