
How to download ota.bin through command in BOOT mode:

1.User Serial Portin boot modeboot pin pull lowpress CHIP_EN buttonresetbaud rate921600bps
2.input command: erase 0x13200 0x100000and enterwait until $ appear
3.input command: write 0x13200 ,and enterchoose "transfer"  --> "send ymodem"and choose "ota.bin", and update
4.User Serial Port:  status pin pull lowand boot Pin pull low baud rate:921600"QC log" will be printed, and make sure the version of firmware and CRC value.