Firmware Receiver v13

Receiver firmware v13

Released	2026-05
Status	Superseded by v14
Pairs with dongle	v8+
Predecessor	v12

Downloads

File	Purpose	Download
os4_receiver_v13.bin	App partition.	Download
os4_receiver_v13.bootloader.bin	Chip bootloader.	Download
os4_receiver_v13.partitions.bin	Partition table.	Download
os4_receiver_v13.boot_app0.bin	OTA "next-app" pointer.	Download

Release notes

Relax receiver disconnect tolerance.

• Minimum disconnect threshold increased from 5 s → 8 s.
• Adaptive threshold increased from 5× → 6× observed poll gap.
• Maximum threshold increased from 60 s → 90 s.

This is a tuning-only change on top of v12's adaptive disconnect detection — large fleets being polled slowly now tolerate more single-poll misses before the receiver flags itself disconnected.

Upgrade notes

• No wire-protocol changes. Drop-in.

How to flash

• OTA available if v15+ is already on the board (it isn't on v13). Wired only via Flashing a receiver.