diff --git a/src/spi.rs b/src/spi.rs
index df7b6a6d..795333c5 100644
--- a/src/spi.rs
+++ b/src/spi.rs
@@ -227,6 +227,7 @@ pub struct SpiBusDriver<T> {
     _driver: T,
     trans_len: usize,
     hardware_cs: bool,
+    last_word: u8,
 }
 
 impl<T> SpiBusDriver<T> {
@@ -262,6 +263,7 @@ impl<T> SpiBusDriver<T> {
             _driver: driver,
             trans_len,
             hardware_cs: false,
+            last_word: 0,
         })
     }
 
@@ -350,6 +352,25 @@ impl<T> SpiBusDriver<T> {
     }
 }
 
+impl<T> embedded_hal_0_2::spi::FullDuplex<u8> for SpiBusDriver<T> {
+    type Error = EspError;
+
+    fn read(&mut self) -> nb::Result<u8, Self::Error> {
+        Ok(self.last_word)
+    }
+    fn send(&mut self, word: u8) -> nb::Result<(), Self::Error> {
+        polling_transmit(
+            self.handle.0,
+            std::ptr::addr_of_mut!(self.last_word),
+            std::ptr::addr_of!(word),
+            1,
+            1,
+            false,
+        )
+        .map_err(|e| e.into())
+    }
+}
+
 impl<T> embedded_hal::spi::ErrorType for SpiBusDriver<T> {
     type Error = SpiError;
 }
@@ -606,6 +627,7 @@ where
             _driver: (),
             trans_len,
             hardware_cs: self.with_cs_pin,
+            last_word: 0,
         };
 
         let trans_result = f(&mut bus);