I got bored and wrote a quick script that should handle your use case:
Code:
import subprocess
from http.server import *
class KindleLipcHandler(BaseHTTPRequestHandler):
def _set_backlight_level(self, level):
subprocess.run(
f"lipc-set-prop com.lab126.powerd flIntensity {level}",
shell=True
)
def _get_backlight_level(self):
level = subprocess.check_output(
"lipc-get-prop com.lab126.powerd flIntensity",
shell=True
)
return int(level.strip().decode())
def _wakeup(self):
subprocess.run(
"lipc-set-prop com.lab126.powerd wakeUp 1",
shell=True
)
def handle_backlight(self, path_tokens):
action = path_tokens[-1]
current_level = self._get_backlight_level()
new_level = current_level
if action == "up":
if current_level < 24:
new_level = current_level + 1
elif action == "down":
if current_level > 0:
new_level = current_level - 1
elif action.isdigit():
if int(action) in range(0,25):
new_level = int(action)
if new_level != current_level:
self._set_backlight_level(new_level)
return 1
return 0
def handle_wake(self):
self._wakeup()
return 1
def do_GET(self):
path_tokens = self.path.split("/")
t_len = len(path_tokens)
ret = 0
if t_len == 3:
if path_tokens[1] == "backlight":
ret = self.handle_backlight(path_tokens)
elif t_len == 2:
if path_tokens[1] == "wake":
ret = self.handle_wake()
if ret:
self.send_response(200)
else:
self.send_response(500)
self.send_header("Content-type", "text/html")
self.end_headers()
if ret:
res = "<html>OK</html>"
else:
res = "<html>FAIL</html>"
self.wfile.write(res.encode())
def run(server_class=HTTPServer, handler_class=KindleLipcHandler):
server_address = ('', 8000)
httpd = server_class(server_address, handler_class)
httpd.serve_forever()
run()
It provides a very simple API accessible over HTTP with the following endpoints:
- http://{device_ip}/wake - Wake device from sleep
- http://{device_ip}/brightness/up - Set brightness to next level up
- http://{device_ip}/brightness/down - Set brightness to next level down
- http://{device_ip}/brightness/{0,24} - Set brightness to specific level
To run it, install NiLuJe's build of Python3 from
here, save the script above to
/mnt/us/server.py and run
nohup python3 /mnt/us/server.py & from a shell using SSH.
You'll probably need to open port 8000 on the firewall of the Kindle before you can call the endpoints over WiFi.