diff --git a/src/vendor/command/hal.rs b/src/vendor/command/hal.rs
index a2973fd..79ce2b0 100644
--- a/src/vendor/command/hal.rs
+++ b/src/vendor/command/hal.rs
@@ -180,7 +180,9 @@ pub trait HalCommands {
     /// This command stops a previous [HAL Rx Start](HalCommands::rx_start) command
     async fn rx_stop(&mut self);
 
-    // TODO: stack_reset
+    /// This command is equivalent to [HCI Reset](crate::host::HostHci::reset) but ensures
+    /// the sleep mode is entered immediately after its completion.
+    async fn stack_reset(&mut self);
 }
 
 impl<T: Controller> HalCommands for T {
@@ -296,6 +298,11 @@ impl<T: Controller> HalCommands for T {
         self.controller_write(crate::vendor::opcode::HAL_RX_STOP, &[])
             .await;
     }
+
+    async fn stack_reset(&mut self) {
+        self.controller_write(crate::vendor::opcode::HAL_STACK_RESET, &[])
+            .await;
+    }
 }
 
 /// Potential errors from parameter validation.
diff --git a/src/vendor/opcode.rs b/src/vendor/opcode.rs
index 9854ede..829cc7d 100644
--- a/src/vendor/opcode.rs
+++ b/src/vendor/opcode.rs
@@ -45,6 +45,7 @@ vendor_opcodes! {
         pub const HAL_READ_RAW_RSSI = 0x32;
         pub const HAL_RX_START = 0x33;
         pub const HAL_RX_STOP = 0x34;
+        pub const HAL_STACK_RESET = 0x3B;
     }
     Gap = 0x1;
     {