Htrc T240 Duo Firmware Update

Early batches of the T240 Duo had a bug where Channel 2 would occasionally not recognize a NiMH battery. This was fixed in version 1.0.8 and above. If you are still on an early build, you are living with the bug.

Follow these instructions meticulously. The process takes approximately 5–10 minutes. Htrc T240 Duo Firmware Update

Even with careful planning, issues can arise. Here are the most frequent problems during an Htrc T240 Duo Firmware Update and their solutions. Early batches of the T240 Duo had a

| Problem | Likely Cause | Solution | |---------|--------------|----------| | PC does not detect charger | Bad USB cable or missing driver | Use a known good data cable. Reinstall STM32 drivers. | | Updater tool crashes at 50% | Interrupted power or wrong firmware file | Re-download the file. Ensure AC power is stable. Restart from Step 4. | | Charger screen goes black after update | Incomplete flash | Perform a “recovery flash.” Put charger back in DFU mode and re-upload. | | Error: “Target not found” | Wrong COM port or charger not in DFU | Check Device Manager. Repeat DFU mode procedure. | | New features not appearing | Updated wrong variant (e.g., T240 non-Duo) | Double-check model number. Download correct firmware. | Follow these instructions meticulously

If all else fails: Contact HTRC support via their official email or join a dedicated RC Facebook group. The community often has beta firmware or recovery scripts.