Run PL2303_Driver_Installer.exe or CP210x_Universal_Windows_Driver.exe (depending on your USB-serial chip). Reboot.
Always verify the checksum of any downloaded executable and prefer the most recent commit that matches your device’s chip revision. This reduces the risk of incompatibility or, worse, bricking the hardware.
| Error Message | Likely Cause | Solution | |---------------|---------------|----------| | No device found | Wrong COM port or missing drivers | Check Device Manager; reinstall drivers | | Sync failed | Chip not in bootloader mode | Re-do the BOOT pin shorting method | | Checksum mismatch | Corrupted firmware file | Re-download the firmware from a different source | | Write timeout | Baud rate too high | Reduce to 57600 or 38400 | | Erase failed | Flash write-protected | Some chips require unprotecting via a separate command (look for SPUnlock.exe ) |
: Plug the RS232 cable into the PC and the receiver (keep the receiver powered : Open the loader tool and select the correct (e.g., COM1 or COM3).
