The voltage thresholds were recalibrated. The icon now turns red at 3.3V rather than 3.6V, giving you accurate warning time before shutdown.
Despite the lack of updates, users frequently request fixes for:
None of these have been addressed via firmware because no update mechanism exists.
Assumption: You have built the cable, installed CP2102 drivers (via Zadig or official SiLabs), and have the .hex file ready. xhdata d-808 firmware update
Do not download random .bin files from forums. Email XHDATA directly at their official support address (found on their website or in your manual). Request the "Firmware fix for the encoder for the Blue Dot D-808." They usually reply within 48 hours with a link.
Old firmware muted audio for 300ms between each 1 kHz step. New firmware reduces this to ~100ms. It is not seamless (like a DSP radio), but it is far less jarring.
After extensive research across the following sources, no official firmware update file has ever been released: The voltage thresholds were recalibrated
Verdict: There is no way for an end user to update the firmware of a standard D-808.
If you need improved media compatibility or fixes and can obtain a verified firmware for your exact D-808 revision, the update is worthwhile; otherwise, weigh the risk of bricking and data loss. Follow the checklist and prefer official/verified community sources.
If you want, I can:
Report: XHDATA D-808 Firmware Update Analysis
Subject: Investigation into firmware updates, version history, and flashing procedures for the XHDATA D-808 Multi-band Radio.
Date: October 26, 2023 Device: XHDATA D-808 None of these have been addressed via firmware