alex-tomin

How to Debug TLS/SSL session for ESP8266 (WiFiClientSecure) with Wireshark

Check this link for ESP32

Modify WiFiClientSecureBearSSL.h to write secrets

if you develop via PlatformIO you cna find the file C:\Users\<user>\.platformio\packages\framework-arduinoespressif8266\libraries\ESP8266WiFi\src\WiFiClientSecureBearSSL.h If you are using VSCode - it can navigate to sources nicely.

1. Move *_eng declaration to public section for WiFiClientSecureCtx class

alex-tomin

#include <WiFiClientSecure.h>

int export_keys(void *p_expkey, const unsigned char *p_master, const unsigned char *kb,
                    size_t maclen, size_t keylen, size_t ivlen,
                    const unsigned char client_random[32], const unsigned char p_server_random[32], mbedtls_tls_prf_types tls_prf_type)
{
    
    Serial.println("   ------SSLKEYLOGFILE Format------------  ");
    Serial.print("CLIENT_RANDOM ");
    for (size_t i = 0; i < 32; i++)

alex-tomin

ESPHome: Connecting to Secure MQTT Server from esp 8266 / esp32

In this example I tried to Connect to Azure Event Grid. Which worked in MQTTX (you can download the tool here), but ESP Home does not support it out of the box. See esphome/feature-requests#1019

This example receives a json message in the following format and converts values to few sensors.

{
  "IncidentId": "1234456",
  "Team":"HardWorkers",
 "Title":"Power Loss",