通过demo,内的mqtt_demo(1);无法连接服务器。
-----------conn_type 1 ctx 0x20025744 mqtt_demo_socket_id 0x20025748
----------------sta ip: 192.168.2.170
----------------step1: init mqtt lib.
----------------step2: establishing TCP connection.
. Seeding the random number generator... ok
. Connecting to tcp... ok
. Setting up the SSL/TLS structure... ok
. Performing the SSL/TLS handshake... ok
----------------step3: establishing mqtt connection.
tls recv -30848 closed
----------------Error(-30848) on read packet!