ESP32 Forum

Hi, I'm trying to send a POST request to a server using my ESP32-S3. The HTTPs connection was working fine until I added some of the mqtt broker connection bits. I'm using the esp_crt_bundle to verify the server. As you can see from the logs, it shows certificate verified, but the connection is failed. Can you please advice on this issue?

Please refer to the more detailed logs below:
I (733475) MQTT: ########## ########### ###########
I (733515) mbedtls: ssl_tls.c:3919 => handshake

I (733515) mbedtls: ssl_msg.c:2358 => flush output

I (733515) mbedtls: ssl_msg.c:2367 <= flush output

I (733525) mbedtls: ssl_tls.c:3838 client state: MBEDTLS_SSL_HELLO_REQUEST

I (733525) mbedtls: ssl_msg.c:2358 => flush output

I (733535) mbedtls: ssl_msg.c:2367 <= flush output

I (733535) mbedtls: ssl_tls.c:3838 client state: MBEDTLS_SSL_CLIENT_HELLO

I (733545) mbedtls: ssl_client.c:924 => write client hello

I (733555) mbedtls: ssl_msg.c:2788 => write handshake message

I (733565) mbedtls: ssl_msg.c:2948 => write record

I (733565) mbedtls: ssl_msg.c:3085 <= write record

I (733575) mbedtls: ssl_msg.c:2909 <= write handshake message

I (733575) mbedtls: ssl_client.c:1012 <= write client hello

I (733585) mbedtls: ssl_msg.c:2358 => flush output

I (733585) mbedtls: ssl_msg.c:2372 message length: 141, out_left: 141

I (733595) mbedtls: ssl_msg.c:2379 ssl->f_send() returned 141 (-0xffffff73)

I (733605) mbedtls: ssl_msg.c:2406 <= flush output

I (733615) mbedtls: ssl_tls.c:3838 client state: MBEDTLS_SSL_SERVER_HELLO

I (733615) mbedtls: ssl_tls12_client.c:1193 => parse server hello

I (733625) mbedtls: ssl_msg.c:4122 => read record

I (733635) mbedtls: ssl_msg.c:2160 => fetch input

I (733635) mbedtls: ssl_msg.c:2300 in_left: 0, nb_want: 5

I (733645) mbedtls: ssl_msg.c:2320 in_left: 0, nb_want: 5

I (733645) mbedtls: ssl_msg.c:2323 ssl->f_recv(_timeout)() returned 5 (-0xfffffffb)

I (733655) mbedtls: ssl_msg.c:2345 <= fetch input

I (733665) mbedtls: ssl_msg.c:2160 => fetch input

I (733665) mbedtls: ssl_msg.c:2300 in_left: 5, nb_want: 7

I (733675) mbedtls: ssl_msg.c:2320 in_left: 5, nb_want: 7

I (733685) mbedtls: ssl_msg.c:2323 ssl->f_recv(_timeout)() returned 2 (-0xfffffffe)

I (733685) mbedtls: ssl_msg.c:2345 <= fetch input

I (733695) mbedtls: ssl_msg.c:5027 got an alert message, type: [2:40]

W (733705) mbedtls: ssl_msg.c:5034 is a fatal alert message (msg 40)

W (733705) mbedtls: ssl_msg.c:4177 mbedtls_ssl_handle_message_type() returned -30592 (-0x7780)

W (733715) mbedtls: ssl_tls12_client.c:1197 mbedtls_ssl_read_record() returned -30592 (-0x7780)

I (733725) mbedtls: ssl_tls.c:3930 <= handshake

E (733735) esp-tls-mbedtls: mbedtls_ssl_handshake returned -0x7780
I (733745) esp-tls-mbedtls: Certificate verified.
E (733745) esp-tls: Failed to open new connection
E (733755) transport_base: Failed to open a new connection
E (733765) HTTP_CLIENT: Connection failed, sock < 0
I (733765) MQTT: HTTP_EVENT_ERROR
E (733765) MQTT: HTTP POST request failed: ESP_ERR_HTTP_CONNECT
I (733775) MQTT: Last esp error code: 0x801a
I (733775) MQTT: Last mbedtls failure: 0x7780
No response from server after POST request!

It is most likely shortage of internal RAM.
Also check this in config, i had issue recently when set to true with TLS