Hello @Sayajirao Waydande,
based on the exception 'SSL routines:tls_process_server_certificate:certificate verify failed' it seems your device is not capable of accessing the (Digicert (latest)/Baltimore (almost deprecated)) TLS certificate needed to secure the communication with the IoT Hub.
It probably works on your laptop because that application can access the certificate store on your laptop.
Please be sure your application also uploads the TLS certificate to your device.
Check out the SDK samples and quickstarts.
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