Upgrade UniFi AP via command line

Sometimes when you upgrade firmware of access points (AP) through the UniFi controller interface, AP hung in Upgrading state (eg UniFi AP PRO).
When you restart AP, it does not change state and AP does not reach.
In this case, you need to upgrade AP firmware via command line.
It is assumed the server is installed on Linux

1. Determine controller version and firmware code:
   Version: execute command on the server

   ls -l /usr/lib/unifi/dl/firmware/BZ2/
   

   resulting directory is version number

   Firmware code determined by the table:
   

   AP Name	Code
   UniFi AP	BZ2
   UniFi AP-LR	BZ2
   UniFi AP-Outdoor	BZ2
   UniFi AP-Outdoor 5G	BZ2
   PicoStation M2	BZ2
   UniFi AP-Pro	U7P
   UniFi AP-AC	U7E
   UniFi AP-AC Outdoor	U7E
   UniFi AP-AC v2	U7E
   UniFi AP48-LR	U2S48
   UniFi AP48	U2S48
   UniFi AP-Outdoor+	U2S48

2. Enter to AP via ssh:

   ssh ubnt@ap.ip
   

   Login: ubnt
   Password: ubnt

3. Execute command on AP:

   syswrapper.sh upgrade http://controller.ip:8080/dl/firmware/[firmware_code]/[controller_version]/firmware.bin
   

   E.g, for UniFi AP-Pro and controller version 3.1.10.2519, command must be:

   syswrapper.sh upgrade http://controller.ip:8080/dl/firmware/U7P/3.1.10.2519/firmware.bin
   

   After the AP’s firmware will be updated, it will be rebooted and after a while will be visible in the controller as a worked