Uploading

To upload to the module, configure the following pins:

Pin	Level	Description
CH_PD	High	Enables the chip
GPIO0	Low	Selects UART download [[boot mode
GPIO2	High	Selects UART download [[boot mode
GPIO15	Low	If availble. Selects UART download [[boot mode

Pinout is in Hardware versions

Uploading

/opt/Espressif/esptool-py/esptool.py --port /dev/ttyUSB0 write_flash 0x00000 eagle.app.v6.flash.bin
sleep 3
/opt/Espressif/esptool-py/esptool.py --port /dev/ttyUSB0 write_flash 0x40000 eagle.app.v6.irom0text.bin

Caveats

• Note to Windows users: For the port argument, use standard port names, e.g. COM3.
• Sometimes a reset is required between uploading the first and second file.
• There are some cases that the upload fails with "Failed to leave Flash mode". This is normal your upload went without issues.