6.1.4.2 Running the Application

  1. Mount the AVR128DB48 Curiosity Nano host board and the RNWF11 Add On Board on Curiosity Nano base board at respective headers. For more details about the boards placement in the Curiosity Nano base, refer to the Figure 6-1.
  2. Connect the debugger USB port on the AVR128DB48 Curiosity Nano board to computer using a micro USB cable.
  3. Change the configuration. There are two options to change the configuration:
    1. Option 1: Change the configuration manually in the code.
      1. Open the code in MPLAB IDE v6.00 or higher and add Home AP and device information in the application code.
        • In rnwf_app.h, add Wi-Fi configurations in HOME_AP_SSID, HOME_AP_PASSPHRASE, HOME_AP_SECURITY.
        • In rnwf_app.c, use the first parameter in the tls_cfg_1[] for changing the Root CA certificate. If the user prefers to change the SNI (Server name), change the fifth parameter in the tls_cfg_1[] variable.
          For example, to set the Root CA certificate to test.mosquitto.org, replace "AmazonRootCA1" with test.mosquitto.org. Similarly, make the changes for the “Server Name”.
          const char *tls_cfg_1[] = {"AmazonRootCA1", 0, 0, 0, "s3-us-west-2.amazonaws.com", 0};
    2. Option 2: Change the configuration via MCC Melody.
      • For more details about Wi-Fi configurations, refer Figure 3-5.
        1. The following fields can be configured via MCC Melody Wi-Fi settings:
          1. SSID
          2. Passphrase
          3. Security Type
      • For more details about TLS configurations, refer Figure 3-11.
        • The following fields can be configured via MCC Melody Net Sock settings - TLS;
          1. Root CA
          2. Server Name
      • Refer to the Appendix A.4 - Merging Manual Changes Into Regenerated Code to understand how to merge code upon regeneration.
  4. Save the changes, then build and program the code to the hardware using MPLAB X IDE.
    Figure 6-10. Programming the Board
  5. Open the Terminal application (for example, Tera Term or PuTTY) on the PC
  6. Connect to the “USB to UART” COM port and configure the serial settings as follows:
    1. Baud: 115200
    2. Data: 8 Bits
    3. Parity: None
    4. Stop: 1 Bit
    5. Flow Control: None
  7. As the board boots up, it will connect to Home-AP and prints the IP address obtained. The board will establish a connection with AWS S3. After establishing a successful TLS server-client connection, the application will try to access/read the document listed.
    Figure 6-11. TLS Client Serial Logs
  8. Once the device receives entire document, Receive Complete message is printed on serial console as illustrated in the following figure.
    Figure 6-12. TLS Client Serial Logs