Configure OkMonitor extension on each Kindle
Allow Non Internet Connected Wifi Networks
Please make you have the 'Coward's Rescue Pack' installed and optionally the Rescue Pack. Without these pack installed, you can complete brick a Kindle. Both packs prevent data loss.
Then open the 'Book' Kindle Launcher. Then select 'Ok Monitor'
Then 'Set Up OK Monitor', Then 'Disable connectivity check'.
Connect to OkMonitor Wireless network
Home -> Setting -> WiFi Networks -> OkMonitor
Connect using password monitorok
Install OkMonitor SSH Key
Allow OkMonitor running on PI SSH access. by copying the key on to the kindle.
Then open the 'Book' Kindle Launcher. Then select 'Ok Monitor'
Then 'Set Up OK Monitor', Then 'Install OpenWRT ssh Key'.
This will necessitate a reboot of the kindle.