Af-5x Firmware - Ubiquiti

She had one option: recover via the bootloader over the air.

She groaned, pulling up the dashboard. SNR had flatlined. No RF. No Ethernet. Just a heartbeat from the management IP, stubbornly blinking like a dying star.

The link came up at full capacity. 748 Mbps. The AF-5X on v3.7.11 was singing again. She locked both radios to the stable release, disabled automatic updates permanently, and added a note in the wiki: “Never trust a beta firmware on a backhaul you can’t touch.” ubiquiti af-5x firmware

For 90 seconds, both radios went dark. The mine’s network dashboard showed nothing. Her phone buzzed with the first on-call manager asking for an update. She ignored it.

She never told them about the 90 seconds of dead air. But from that night on, every AF-5X she deployed carried a tiny label on its chassis, handwritten in silver Sharpie: “You are not bricked. You are waiting for a TFTP ghost.” Want a version with a different angle—like a sabotage plot or a multi-team rescue across two continents? She had one option: recover via the bootloader over the air

The problem wasn’t the distance. It was access. Denison East sat on a frozen ridge with no road in winter. The only way to reach it was a 6-hour snowmobile ride—at dawn. The mine’s autonomous haul trucks would lose their guidance feed in three hours. At 6 AM, production would halt. Loss: $200,000 per hour.

By dawn, the haul trucks were moving ore. The mine manager sent a one-line email: “Link stable?” The link came up at full capacity

The logs showed the culprit: an automatic firmware push. The NOC had tried to update both ends from v3.7.11 to v4.0.2-beta. The near side (Denison West) had taken it. The far side (Denison East) was now a brick.

Then the alert came at 2:47 AM.

Marta didn’t panic. She switched from UDP to TCP-tunneled TFTP through the West radio’s management plane, sacrificing speed for reliability. The upload resumed. Block 312. Checksum valid.

while true; do tftp -m binary 10.0.3.88 -c put AF5X-v3.7.11.bin -t 1 sleep 11.5 done On the tenth attempt, nothing. On the twenty-third, a single acknowledgment packet came back. The East radio had bitten. But the window was only 2.7 seconds. She watched the hex dump scroll—blocks 1 through 312 of the firmware uploading at 1 Mbps over the degraded control channel.