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Upgrading Firmware

Prerequisites​

Configuration​

  1. Remove the rear cover of the oven.
  2. Remove the plastic cover protecting the PCB.
  1. Connect the USB-to-serial adapter to the debug pins. In order to use the automatic bootloader, all 5 pins must be connected as follows:

By using tcpdump to analyze traffic from my APO's I was able to see that firmware is available via public links. See below for a changelog and available versions:

Anova Changelog

1.0.0, 1.0.1, 1.1.9, 1.1.20, 1.1.23, 1.1.31, 1.1.32, 1.1.33, 1.2.7, 1.2.10, 1.4.17, 1.4.18, 1.4.21, 1.4.24

2.0.11, 2.1.3, 2.1.5, 2.1.7, 2.1.8, 2.1.9, 2.1.10

Procedure​

  1. Connect to the APO as detailed in Serial Console
  2. Download the desired firmware
  3. Back up your current flash. If you don't do this, there is no easy way back.
esptool.py --chip esp32 --port /dev/<serial-device> -b 230400 read_flash 0 ALL backup.bin
  1. Erase the factory partition
esptool.py --chip esp32 --port /dev/<serial-device> -b 230400 erase_region 0x00010000 0x0012c000
  1. Flash the firmware
esptool.py --chip esp32 --port /dev/<serial-device> -b 230400 write_flash 0x00010000 <path_to_firmware_bin> -u
  1. Disconnect from the debug pins
  2. Briefly unplug the APO

Restoring From Backup​

As long as you backed up the original firmware in the previous steps, you can always restore from backup.

esptool.py --chip esp32 --port /dev/<serial-device> -b 230400 write_flash 0 backup.bin -u -e