diff --git a/adafruit_platformdetect/board.py b/adafruit_platformdetect/board.py
index 664f4ef..f4ca8b1 100644
--- a/adafruit_platformdetect/board.py
+++ b/adafruit_platformdetect/board.py
@@ -151,6 +151,8 @@ def id(self) -> Optional[str]:
             board_id = self._rock_pi_id()
         elif chip_id == chips.RK3399:
             board_id = self._rock_pi_id() or self._armbian_id()
+        elif chip_id == chips.RK3399_T:
+            board_id = self._rock_pi_id() or self._armbian_id()
         elif chip_id == chips.ATOM_X5_Z8350:
             board_id = self._rock_pi_id()
         elif chip_id == chips.ATOM_J4105:
@@ -511,6 +513,8 @@ def _rock_pi_id(self) -> Optional[str]:
             board = boards.ROCK_PI_X
         if board_value and "ROCK 5" in board_value.upper():
             board = boards.ROCK_PI_5
+        if board_value and "RADXA ROCK 4C+" in board_value.upper():
+            board = boards.ROCK_PI_4_C_PLUS
         return board
 
     def _clockwork_pi_id(self) -> Optional[str]:
diff --git a/adafruit_platformdetect/chip.py b/adafruit_platformdetect/chip.py
index 2e08d02..aae4c70 100644
--- a/adafruit_platformdetect/chip.py
+++ b/adafruit_platformdetect/chip.py
@@ -209,6 +209,9 @@ def _linux_id(self) -> Optional[str]:
         if self.detector.check_dt_compatible_value("rockchip,rk3308"):
             return chips.RK3308
 
+        if self.detector.check_dt_compatible_value("radxa,rock-4c-plus"):
+            return chips.RK3399_T
+
         if self.detector.check_dt_compatible_value("rockchip,rk3399"):
             return chips.RK3399
 
diff --git a/adafruit_platformdetect/constants/boards.py b/adafruit_platformdetect/constants/boards.py
index d6af21e..f795dde 100644
--- a/adafruit_platformdetect/constants/boards.py
+++ b/adafruit_platformdetect/constants/boards.py
@@ -167,6 +167,7 @@
 
 ROCK_PI_S = "ROCK_PI_S"
 ROCK_PI_4 = "ROCK_PI_4"
+ROCK_PI_4_C_PLUS = "ROCK_PI_4C+"
 ROCK_PI_X = "ROCK_PI_X"
 ROCK_PI_E = "ROCK_PI_E"
 ROCK_PI_5 = "ROCK_PI_5"
@@ -541,6 +542,7 @@
 _ROCK_PI_IDS = (
     ROCK_PI_S,
     ROCK_PI_4,
+    ROCK_PI_4_C_PLUS,
     ROCK_PI_X,
     ROCK_PI_E,
     RADXA_ZERO,
diff --git a/adafruit_platformdetect/constants/chips.py b/adafruit_platformdetect/constants/chips.py
index 6a4b35f..4dc2b9a 100644
--- a/adafruit_platformdetect/constants/chips.py
+++ b/adafruit_platformdetect/constants/chips.py
@@ -52,6 +52,7 @@
 H616 = "H616"
 RK3308 = "RK3308"
 RK3399 = "RK3399"
+RK3399_T = "RK3399_T"
 RK3328 = "RK3328"
 LPC4330 = "LPC4330"
 RK3288 = "RK3288"