diff --git a/cereal b/cereal
index d054cbc704..a0850ebef6 160000
--- a/cereal
+++ b/cereal
@@ -1 +1 @@
-Subproject commit d054cbc70423036a09a9449f7b7b19c058921578
+Subproject commit a0850ebef69c5a3c43c875fb730528b049bad2e1
diff --git a/selfdrive/hardware/base.py b/selfdrive/hardware/base.py
index f3b27be31a..a1b67cb38b 100644
--- a/selfdrive/hardware/base.py
+++ b/selfdrive/hardware/base.py
@@ -110,6 +110,10 @@ class HardwareBase:
   def set_screen_brightness(self, percentage):
     pass
 
+  @abstractmethod
+  def get_screen_brightness(self):
+    pass
+
   @abstractmethod
   def set_power_save(self, powersave_enabled):
     pass
diff --git a/selfdrive/hardware/eon/hardware.py b/selfdrive/hardware/eon/hardware.py
index 14475eddbe..2296c26e6d 100644
--- a/selfdrive/hardware/eon/hardware.py
+++ b/selfdrive/hardware/eon/hardware.py
@@ -375,6 +375,13 @@ class Android(HardwareBase):
     with open("/sys/class/leds/lcd-backlight/brightness", "w") as f:
       f.write(str(int(percentage * 2.55)))
 
+  def get_screen_brightness(self):
+    try:
+      with open("/sys/class/leds/lcd-backlight/brightness") as f:
+        return int(float(f.read()) / 2.55)
+    except Exception:
+      return 0
+
   def set_power_save(self, powersave_enabled):
     pass
 
diff --git a/selfdrive/hardware/pc/hardware.py b/selfdrive/hardware/pc/hardware.py
index b1c340376b..b2be6ca91c 100644
--- a/selfdrive/hardware/pc/hardware.py
+++ b/selfdrive/hardware/pc/hardware.py
@@ -83,6 +83,9 @@ class Pc(HardwareBase):
   def set_screen_brightness(self, percentage):
     pass
 
+  def get_screen_brightness(self):
+    return 0
+
   def set_power_save(self, powersave_enabled):
     pass
 
diff --git a/selfdrive/hardware/tici/hardware.py b/selfdrive/hardware/tici/hardware.py
index 864d653d01..4ac69a443d 100644
--- a/selfdrive/hardware/tici/hardware.py
+++ b/selfdrive/hardware/tici/hardware.py
@@ -283,6 +283,13 @@ class Tici(HardwareBase):
     except Exception:
       pass
 
+  def get_screen_brightness(self):
+    try:
+      with open("/sys/class/backlight/panel0-backlight/brightness") as f:
+        return int(float(f.read()) / 10.23)
+    except Exception:
+      return 0
+
   def set_power_save(self, powersave_enabled):
     # amplifier, 100mW at idle
     self.amplifier.set_global_shutdown(amp_disabled=powersave_enabled)
diff --git a/selfdrive/thermald/thermald.py b/selfdrive/thermald/thermald.py
index 43e85149b0..b7e8bab9ad 100755
--- a/selfdrive/thermald/thermald.py
+++ b/selfdrive/thermald/thermald.py
@@ -290,6 +290,7 @@ def thermald_thread():
     if modem_temps is not None:
       msg.deviceState.modemTempC = modem_temps
 
+    msg.deviceState.screenBrightnessPercent = HARDWARE.get_screen_brightness()
     msg.deviceState.batteryPercent = HARDWARE.get_battery_capacity()
     msg.deviceState.batteryCurrent = HARDWARE.get_battery_current()
     msg.deviceState.usbOnline = HARDWARE.get_usb_present()