you can use at framework to send/recv data in socket API
example: see examples\tcp_through_module_based_at_socket
project: see board\TencentOS_tiny_EVB_MX_Plus\KEIL\tcp_through_module_based_at_socket
1. use TencentOS-tiny\board\TencentOS_tiny_EVB_MX_plus\KEIL\qcloud_iot_explorer_sdk_data_template instead of TencentOS-tiny\board\TencentOS_tiny_EVB_MX\KEIL\ tencent_cloud_sdk_data_template