esp32 ota example error

[icy_gau]

hi, i was referring to advanced ota example. im getting below error:
I (5624) advanced_https_ota_example: Starting Advanced OTA example
E (5904) esp-tls-mbedtls: mbedtls_ssl_handshake returned -0x2700
I (5904) esp-tls-mbedtls: Failed to verify peer certificate!
I (5914) esp-tls-mbedtls: verification info: ! The certificate is not correctly signed by the trusted CA

E (5924) esp-tls: Failed to open new connection
E (5924) TRANS_SSL: Failed to open a new connection
E (5934) HTTP_CLIENT: Connection failed, sock < 0
E (5934) esp_https_ota: Failed to open HTTP connection: ESP_ERR_HTTP_CONNECT
E (5944) esp_https_ota: Failed to establish HTTP connection
E (5954) advanced_https_ota_example: ESP HTTPS OTA Begin failed
W (6544) wifi:<ba-del>idx
W (9604) wifi:<ba-add>idx:0 (ifx:0, e8:48:b8:61:bb:81), tid:0, ssn:21, winSize:64
W (10564) wifi:<ba-del>idx
W (13594) wifi:<ba-add>idx:0 (ifx:0, e8:48:b8:61:bb:81), tid:0, ssn:22, winSize:64
W (14594) wifi:<ba-del>idx

please suggest how to resolve. what to steps to generate certificate and where to include in project.

[ESP_Mahavir]

Please check documentation at https://github.com/espressif/esp-idf/bl ... /README.md

Some of the similar issues that you may find useful in this context:
https://github.com/espressif/esp-idf/issues/6833
https://github.com/espressif/esp-idf/issues/4657

[icy_gau]

hi.. thanks for info... i was using aws s3 to upload binary.. please can i know how to generate certificates

[ESP_Mahavir]

i was using aws s3 to upload binary.. please can i know how to generate certificates

https://github.com/espressif/esp-idf/is ... -460917118

[icy_gau]

thanks for quick response ... but with command
openssl s_client -showcerts -connect s3.amazonaws.com:443 < /dev/null
i get : "The system cannot find the path specified." error.
please guide how to resolve

[ESP_Shubham]

Hi, I am attaching certificate required for connecting to S3 server. Please try using the same.

ca_cert.pem.zip

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