After applying the 153e upgrade firmware, it says the device cannot be found.
Why do you need to update the firmware program for the device you purchased that is not 153E? You need to update it again. You need to send your email and I will send you a 293S firmware program
The firmware upgrade has been sent out. You can download your corresponding model and run the update. If it still doesn't work, you need to return to the original factory for repair