If you’re not able to communicate to your module, neither over the serial interface nor over the network, possibly due to installing the wrong update file. It requires that you use the Commander program, that you can connect to the module’s serial port and that you have access to the module’s reset or can power cycle the device.
Please be noted that keep serial connection when you power cycle or reset the device. If your device/system are powered by USB that is also a serial port, you cannot plug out/plug in USB cable to power cycle the device. Because the serial connection will also be disconnected when you plug out/plug in USB cable. Please separate Serial port and power supply or use a reset signal for this case.