Thank you WiFive for your response. I looked at the link you mentioned and decided not to use loop-back but send information to my gateway. My gateway is returning the data back again then. Please find below my program. I don't receive anything at my gateway and nothing is returned. Any clues what c...

Hello, I have the below program. Function recvfrom(...) in receive_UDP(...) returns -1 with error-code 11. I believe this is caused by a time-out but I should receive the "Hello world!"-text instead ? Is there someone who could help me finding what is wrong ? Best regards, Wamor /* HTTP GET Example ...

Hello kolban, Thank you for you explanation. I use the following code: char *data = "Hello world"; r = send(socketnumber, data, strlen(data), 0); ESP_LOGI(TAG, "... done sending to socket. Last read return=%d errno=%d", r, errno); My socketnumber is obtanined like this and seems to be 0: socketnumbe...

Hello,

I am using the following line in my code: r = send(socket, data, strlen(data), 0);
r is -1 and the errno is: 22.
is there a list of errornumbers with their explanation?

Thank you and regards,

Wamor

Hello kolban,

Thank you for your response.
I will get me some good books about TCPIP and sockets.

Regards,

Wamor

Hello Angus,

What I basically want to do is receiving UDP-packages from a remote computer and send them out as analog values through the DAC of the ESP32. I hope this make sense to you.

Regards,

Wamor

Hello, I wrote a small program which once connected to wifi should receive TCPIP packages. My program is listed below: nvs_flash_init(); tcpip_adapter_init(); ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) ); ESP_ERROR_CHECK( esp_wifi_init(&cfg) ); ESP_ERROR_CHECK( esp_wifi_get_mac(WIFI_I...

Ok,

Solved my problem.
esp_wifi_reg_rxcb was renamed to esp_wifi_internal_reg_rxcb and was moved to esp_wifi_internal.h.
esp_wifi.rst was not updated for this.

Regards,

Wamor

Hello, I'm busy writing an application which read TCPIP-data over Wifi. I learned that this should be done with a callback-function called: esp_wifi_reg_rxcb but this function is missing in esp_wifi.h. It is described in esp_wifi.rst. Should this still be added or do I need to download the latest li...