用esp-prog 一直下载不进去

[yuanjie]

n_table/partition-table.bin 0x1000 bootloader/bootloader.bin 0x10000 hello-world.bin
esptool.py v2.9-dev
Serial port /dev/ttyUSB1
Connecting........_____....._____....._
Chip is ESP32-D0WD-V3 (revision 3)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 78:e3:6d:5a:a7:3c
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 460800
Changed.
Configuring flash size...
Compressed 3072 bytes to 103...

A fatal error occurred: Timed out waiting for packet content
esptool.py failed with exit code 2

[ESP_ICY]

试试看长按 boot 键，检查下串口有无被占用