Firmware Receiver v11

Receiver firmware v11

Released	2026-05
Status	Superseded by v12
Pairs with dongle	v8+
Predecessor	v10

Downloads

File	Purpose	Download
os4_receiver_v11.bin	App partition.	Download
os4_receiver_v11.bootloader.bin	Chip bootloader.	Download
os4_receiver_v11.partitions.bin	Partition table.	Download
os4_receiver_v11.boot_app0.bin	OTA "next-app" pointer.	Download

Release notes

Adaptive disconnect detection + ACK-payload freshness.

• Disconnect threshold now scales with the observed inter-poll gap (median of the last 8 successful contacts, ×5, floored at 5 s and capped at 60 s). The dongle's clockSyncIntervalMs * numReceivers can range from ~50 ms to many seconds; the old fixed 10 s timeout false-fired the moment the operator slowed polling for a large fleet. Now a fleet polled every 8 s tolerates a missed ACK without declaring "disconnect" until ~40 s of true silence.
• refreshAckPayload() now flushes the ACK TX FIFO before writing so the dongle never receives a stale (>250 ms) status piggyback when commands come in faster than the periodic refresh.

Upgrade notes

• Critical follow-up: pair with v12 or newer if at all possible. v11's adaptive detection introduces the clock-domain bug that v12 fixes.

How to flash

• Wired only. Flashing a receiver.