I have two Kindle PaperWhite PW3, one in 5.13.3 (soft jailbroken) and one in 5.13.7 (serial jailbroken).
For futur users coming through this topic. On both of them, for this extension to work properly, I needed to modify three things:
- Modification of the rtc to rtc1 in config.sh
- Modification of the lipc-wait event call in utils.sh as described by @terencelzw in this
post
- Modification of the include of utils.sh and config.sh in other files as described by @jonnydeath in this
post
And voila, two kindle, one for my leaving room, on for my office room, ready to display a lot of useful informations. (once I will have developed the server part that will gather the intel and generate the picture)