The firmware comes in two parts.

Firmware Version / Maintenance Version
e.g.
1.8.23.0 / 1.8.23.0

Starting with firmware version 1.11.1.0, only the left side (application) version is displayed on the main menu.

There will be three steps to the upgrade if the maintenance files are below 1.8.23.0. Otherwise, only one step is required.

 THE ORDER OF UPDATE IS IMPORTANT

** If the maintenance (AVR) version is less than 1.8.23.0
1. The left side (Firmware Version) is updated via the sysupgrade file form the Firmware upload page.
Update the sysupgrade file to 1.8.23.0.

** If the maintenance (AVR) version is less than 1.8.23.0
2. After that is updated, update the AVR/Maintenance files to 1.8.23.0 to match via the Support link.
https://www.digital-loggers.com/update_avr.html
You may need to reset the “Protection” as described on the web page to enable the update.

3. Finally, update the sysupgrade file to 1.11.8.0 from the Firmware Upload page.

*If the settings are protected, reset the protection locks. 
Press the reset button near the RJ-45 Ethernet connector and wait about 5 seconds. 
You will hear a beep and arrive at the reset menu. You can use the Up/Down arrows to select the kind of reset. The default is "Clear Lock Bits: Clear protection bits only", which is what you want. Press the cycle button. 


