diff --git a/Cargo.toml b/Cargo.toml
index 4acea1d..5cbaa5f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ documentation = "https://docs.rs/esp-at-nal"
 [dependencies]
 atat = "0.17.0"
 embedded-nal = "0.6.0"
+defmt = { version = "0.3", optional = true }
 nb = "1.0.0"
 fugit = "0.3.6"
 fugit-timer = "0.1.3"
@@ -27,6 +28,7 @@ mockall = "0.11.2"
 
 [features]
 default = ["examples"]
+defmt = ["dep:defmt", "atat/defmt"]
 
 # Fail on warnings
 strict = []
diff --git a/src/stack.rs b/src/stack.rs
index a60a2bc..fb9d9ab 100644
--- a/src/stack.rs
+++ b/src/stack.rs
@@ -124,6 +124,30 @@ pub enum Error {
     TimerError,
 }
 
+#[cfg(feature = "defmt")]
+impl defmt::Format for Error {
+    fn format(&self, f: defmt::Formatter) {
+        match self {
+            Error::EnablingMultiConnectionsFailed(e) => defmt::write!(f, "Error::EnablingMultiConnectionsFailed({})", e),
+            Error::EnablingPassiveSocketModeFailed(e) => defmt::write!(f, "Error::EnablingPassiveSocketModeFailed({})", e),
+            Error::ConnectError(e) => defmt::write!(f, "Error::ConnectError({})", e),
+            Error::TransmissionStartFailed(e) => defmt::write!(f, "Error::TransmissionStartFailed({})", e),
+            Error::SendFailed(e) => defmt::write!(f, "Error::SendFailed({})", e),
+            Error::ReceiveFailed(e) => defmt::write!(f, "Error::ReceiveFailed({})", e),
+            Error::CloseError(e) => defmt::write!(f, "Error::CloseError({})", e),
+            Error::PartialSend => defmt::write!(f, "Error::PartialSend"),
+            Error::UnconfirmedSocketState => defmt::write!(f, "Error::UnconfirmedSocketState"),
+            Error::NoSocketAvailable => defmt::write!(f, "Error::NoSocketAvailable"),
+            Error::AlreadyConnected => defmt::write!(f, "Error::AlreadyConnected"),
+            Error::SocketUnconnected => defmt::write!(f, "Error::SocketUnconnected"),
+            Error::ClosingSocket => defmt::write!(f, "Error::ClosingSocket"),
+            Error::ReceiveOverflow => defmt::write!(f, "Error::ReceiveOverflow"),
+            Error::UnexpectedWouldBlock => defmt::write!(f, "Error::UnexpectedWouldBlock"),
+            Error::TimerError => defmt::write!(f, "Error::TimerError"),
+        }
+    }
+}
+
 impl<A: AtatClient, T: Timer<TIMER_HZ>, const TIMER_HZ: u32, const TX_SIZE: usize, const RX_SIZE: usize> TcpClientStack
     for Adapter<A, T, TIMER_HZ, TX_SIZE, RX_SIZE>
 {