mqtt+ssl单向认证（sdk3.2.2/3.3.1）

[shenyong-iot01]

您好，使用sdk内ssl单向验证demo进行验证，显示证书验证失败（但此证书使用MQTTfx工具可以正常连接。android客户端也可以正常连接）代码如附件app_main.c,设备log如附件Failed to verify peer certificate.txt，请帮忙查看下原因。
和连接贵司服务器（使用sdk3.3.1内证书和域名，可正常连接）相比源码只更改证书，域名端口号。

component.mk
COMPONENT_EMBED_TXTFILES := iot_eclipse_org.pem cert.pem //方便编译切换证书

错误信息：
E (6641) esp-tls: mbedtls_ssl_handshake returned -0x2700
I (6651) esp-tls: Failed to verify peer certificate!
I (6651) esp-tls: verification info: ! The certificate Common Name (CN) does not match with the expected CN
! The certificate is not
E (6671) esp-tls: Failed to open new connection
E (6671) TRANS_SSL: Failed to open a new connection
E (6671) MQTT_CLIENT: Error transport connect
D (6681) MQTT_CLIENT: Reconnect after 10000 ms
I (6681) MQTTS_EXAMPLE: MQTT_EVENT_DISCONNECTED