最近在使用CC3220SF测试 MQTT_server这个例程，根据以下网站提供的教程配置好app和板子：
https://dev.ti.com/tirex/explore/node?node=AHJ8YEDDQKAGTuUKvUm0ig__fc2e6sr__LATEST
但在运行的时候终端上总是显示他无法连接
SL Disconnect...
Device came up in Station mode
============================================
MQTT client Example Ver: 2.0.0
============================================
CHIP: 0x30000019
MAC: 2.0.0.0
PHY: 2.2.0.4
NWP: 3.3.0.0
ROM: 0
HOST: 3.0.1.65
MAC address: f0:c7:7f:16:c5:b3
============================================
Device could not connect to SPN24
Please enter the AP(open) SSID name #
请问会是在哪出现问题了呢？我已经按照指示一步步的操作了。如果有人能回复我我将感激不尽！
