Issue: Connection issue to portal.mbedcloud.com from STM32F769I-DISC1 board with Pelion example.

I am trying to bring up the Pelion example on a STM32F769I-DISC1 board.

I have tried pelion-example-common(https://os.mbed.com/teams/ST/code/pelion-example-common/) and pelion-ready-example (https://os.mbed.com/teams/mbed-os-examples/code/pelion-ready-example/ ) Both of the programs fails to register with portal.mbedcloud.com.

I have followed the the steps correctly from this site. https://os.mbed.com/guides/connect-device-to-pelion/1/?board=ST-Discovery-F769NI *********** << serial log >> [BOOT] Mbed Bootloader [BOOT] ARM: 00000000000000000000 [BOOT] OEM: 00000000000000000000 [BOOT] Layout: 0 8009328 [BOOT] Active firmware integrity check: [BOOT] SHA256: 87C10F94E43F5F3BBC6E1CF10E76468103D61A01D65C0482F501F15A69062E2B [BOOT] Version: 1560524045 [BOOT] Slot 0 is empty [BOOT] Active firmware up-to-date [BOOT] Application's start address: 0x8010400 [BOOT] Application's jump address: 0x80110A9 [BOOT] Application's stack address: 0x20080000 [BOOT] Forwarding to application... p@@ Starting Simple Pelion Device Management Client example You can hold the user button during boot to format the storage and change the device identity. Connecting to the network using the default network interface... Connected to the network successfully. IP address: 10.122.16.108 Initializing Pelion Device Management Client... Initialized Pelion Device Management Client. Registering... Press the user button to increment the LwM2M resource value... ADC temp: 23.2234 C, vref: 0.3665 % Button clicked 1 times Button clicked 2 times [SMCC] Error occurred : MbedCloudClient::ConnectNetworkError [SMCC] Error code : 6 [SMCC] Error details : Client in reconnection mode NetworkError *********** << above error happens every 30 seconds and no device listed here. https://portal.mbedcloud.com/devices/list What could be the root cause ? My connection credentials as below from the mbed_cloud_dev_credentials.c file .

const char MBED_CLOUD_DEV_BOOTSTRAP_ENDPOINT_NAME[] = "016b5222ff847a6af473872f03c00000"; const char MBED_CLOUD_DEV_ACCOUNT_ID[] = "016b2914a5fc762d28a836d200000000"; const char MBED_CLOUD_DEV_BOOTSTRAP_SERVER_URI[] = "coaps:bootstrap.us-east-1.mbedcloud.com:5684?aid=016b2914a5fc762d28a836d200000000";

I am on corporate network and I able to ping the target. This proves that network stack is alive. vgeorge@CI0700000000653:$ ping 10.122.16.108 PING 10.122.16.108 (10.122.16.108) 56(84) bytes of data. 64 bytes from 10.122.16.108: icmp_seq=1 ttl=254 time=0.318 ms 64 bytes from 10.122.16.108: icmp_seq=2 ttl=254 time=0.384 ms

Is it possible my corporate policy blocking the port 5684 ?

Any small help to debug this issue is greatly appreciated.

Varughese George