User's Guide

Module Factory Firmware
You can switch back to factory firmware with this command:
OVMS# ota boot factory
Boot from factory at 0x00010000 (size 0x00400000)
Or, without console access (lost module password), using the esptool.py from the Espressif
ESP-IDF toolkit:
esptool.py
--chip esp32 --port /dev/tty.SLAB_USBtoUART --baud 921600
erase_region 0xd000 0x2000
Note: the device needs to be changed to the one assigned by your system, i.e. /dev/ttyUSB0 on
a Linux system.
Install esptool.py
The esptool.py package and installation instructions can be found here:
https://github.com/espressif/esptool
The package normally can be installed without manual download using the python package
manager “pip”, i.e. on Unix/Linux:
sudo pip install esptool
OVMS v3 User Guide Page 54 / 86