Preparing Axio Builder and ESP8266(Wi-Fi).

  • ESP-01(ESP8266) connect as below.

Preparing the mbedtls server.

  • Download mbedtls and compile.
  • Run the ‘programs/ssl/ssl_server2’.
  • ‘ssl_server2’ print message as below. 
    mbedtls.git/programs/ssl$ ./ssl_server2
. Seeding the random number generator... ok
. Loading the CA root certificate ... ok (0 skipped)
. Loading the server cert. and key... ok
. Bind on tcp://*:4433/ ... ok
. Setting up the SSL/TLS structure... ok
. Waiting for a remote connection ...

Preparing the mbedtls client.

  • Download ESP8266_for_Axio and Mbedtls_ESP8266_for_Axio as zip file.
  • In the arduino IDE, use the following procedure to add downloaded zip file.
    • menu > Sketch > Include Library > Add .zip Library… > select ‘ESP8266_for_Axio.zip’ and click ‘OK’ button.
    • Do the same thing for the ‘Mbedtls_ESP8266_for_Axio.zip’.
  • Open Mbedtls example as following procedure.
    • menu > File > Examples > Mbedtls_ESP8266_for_Axio-master > Examples > Mbedtls_ESP8266_Client

Run the mbedtls client.

  • Modify the following values in the example code to suit your development environment.
    • ssid and password of your router to mySSID/myPSK.
    • IP Address of your mbedtls server to destServer.
  • Verify/Compile and Upload to Axio-Builder.
  • Open ‘Serial Monitor’ and check the result. 
      BESP8266 Shield Present
  Mode set to station
  Connecting to SecurityPlatform
  Connected to: SecurityPlatform
  My IP: 192.168.122.14

  Press any key to connect client.

  Start Mbedtls client
  try to connect to server...
  connect success!
  SSL connect success!
  Write to SSL server..
  Read from SSL Server...
  ================== received begin =========
  HTTP/1.0 200 OK
  Content-Type: text/html

  <h2>mbed TLS Test Server</h2>
  <p>Successful connection using: TLS-ECDHE-ECDSA-WITH-AES-256-CBC-SHA</p>

  ================== received done =========
  disconnect SSL connection