How does a smart device access the TP interface on the PC within the same LAN?

The device and the computer are in the same network segment. There is an existing smart device that needs to access the thinkphp interface.
Normal access to this interface on a computer is:
http://localhost/demo/index.php/C/A
or:
http://127.0.0.1/demo/index.php/C/A
So how can smart devices access the interface?
Tried to access via IP, but the message appears: You don't have permission to access on this server.
Modified Apache's httpd.config file:

<code>< Directory / >
     Options FollowSymLinks
     AllowOverride None
     Order deny,allow
     Deny from all
< /Directory ></code>

Still no permissions. Is it related to the firewall?
Or if you use a computer to broadcast WiFi and allow the device to connect to WIFI, this situation will not occur?