GPS on Kindle by Lorenzo Maccone (hacking code by Dave Schneider)
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INSTALL:

Uses the following apps:

1. KickWeb server (or any android web server with php support): 

install and put all the files of the zip into the folder /sdcard/htdocs.
The files are:
root@s5250:/sdcard/htdocs # ls -R
.:
css             googlekey       jquery.min.js   readme.txt      waitingmap.gif
get-gps.php     index.php       map.html        waiting.gif

./css:
ccompBonW.css


2. BlueNMEA (TCP sockets: listening on port 4352)

3. OPTIONAL: Figure out a way to keep the two above apps running in
background (otherwise android will kill them after about ten minutes
on my phone).

I added at the bottom of /system/build.prop the following two lines:

sys.keep_app_1=name.kellermann.max.bluenmea-1
sys.keep_app_1=com.nokshaserv

then I remounted the /system filesystem in my phone as read-write, and

cd /data/app/
mv name.kellermann.max.bluenmea-1/ com.nokshaserv-1/ /system/app
cd /system/app
chown root:root -R name.kellermann.max.bluenmea-1/ com.nokshaserv-1/  

then reboot the phone. (There are probably easier ways to do this!
Don't mess with /system otherwise your phone will stop working, if you
don't know how to do the above things, do not attempt.)

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RUN:

1. Activate phone wi-fi Hotspot

2. open the two apps: kickweb and bluenmea.

3. Connect kindle (or kobo, or sony or whatever) to the phone
hotspot. Open the browser on your kindle (or whatever device) and
navigate to the address of the hotspot, usually:

http://192.168.43.1:8080

(to find the IP address of the phone's hotspot, look for the "gateway"
address of any device that is attached to that hotspot).

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TEST:

L'1/11/2017 ho fatto un lungo giro in bici e dopo 5 ore e 75 Km, dava
un errore di 1% rispetto al contachilometri della bici riguardo alla
distanza totale (2% rispetto al Garmin etrex) e dava il numero
identico riguardo alla velocita' media. Il problema principale e' che
ci sono fluttuazioni istantanee piuttosto grandi: la velocita' oscilla
molto e non e' reattivo (e' sempre indietro di un paio di secondi). La
direzione e' corretta rispetto al Garmin.

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Sunrise/sunset doesn't work yet.