execute : wireless-controller upload‑wtp‑image
 
wireless-controller upload‑wtp‑image
Use this command to upload a FortiWiFi firmware image to the FortiGate unit. Wireless APs controlled by this wireless controller can download the image as needed. Use the execute wireless-controller reset‑wtp command to trigger FortiAP units to update their firmware.
Syntax
FTP:
execute wireless-controller upload-wtp-image ftp <filename_str> <server_ipv4[:port_int]> [<username_str> <password_str>]
TFTP:
execute wireless-controller upload-wtp-image tftp <filename_str> <server_ipv4>