MicroPython Forum (Archive)

I try to erase an «Wemos D1 R32» and to load a new firmware but I have some errors.

I pasted from my Ubuntu terminal:

Error1)
python esptool.py --chip esp32 --port /dev/ttyUSB0 erase_flash
esptool.py v3.1-dev
Serial port /dev/ttyUSB0
Connecting........_____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

Error2)
python esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 115200 write_flash -z 0x1000 esp32spiram-idf3-20191220-v1.12.bin
esptool.py v3.1-dev
Serial port /dev/ttyUSB0
Connecting........_____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

Someone can load micropython firmware into Wemos D1 R32 ?

I answer to myself
WeMos D1 R32 works great. To install the firmware, you just have to connect a wire between GND and «GPIO 00» and disconnect it after executing the terminal command.
The «GPIO 00» acts in «Wemos D1 R32» like the classic ESP32 "boot" button.
Carles.

That's what the boot button does - connect GPIO0 to GND.