Htrc T240 Duo: Firmware Update

| 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. |

Gather your Mini-USB cable, download the latest firmware, and follow the steps above. Your batteries will thank you. Disclaimer: Firmware updates are performed at your own risk. While this guide is thoroughly researched, always refer to the official HTRC documentation for model-specific instructions. If you are uncomfortable with the process, seek assistance from a qualified electronics technician or a local RC club member. Htrc T240 Duo Firmware Update

“I had issues with the charger freezing when switching from NiMH to LiPo. Since the update, it’s been rock solid. I also love the new Li-Ion 21700 profile for my flashlight batteries.” | Problem | Likely Cause | Solution |

Leave a comment in the RC forum thread below. Happy charging Ensure AC power is stable