diff --git a/extra/build.sh b/extra/build.sh
index 6ff88b92..2b2bac7d 100755
--- a/extra/build.sh
+++ b/extra/build.sh
@@ -51,6 +51,11 @@ else
 	args="$*"
 fi
 
+# Check for debug flag and append
+if [ x$2 == x"--debug" ]; then
+	args="$args -- -DEXTRA_CONF_FILE=../extra/debug.conf"
+fi
+
 echo
 echo "Build target: $target $args"
 
diff --git a/extra/debug.conf b/extra/debug.conf
new file mode 100644
index 00000000..183d10bf
--- /dev/null
+++ b/extra/debug.conf
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: Apache-2.0
+# Debug configuration for Arduino Core Zephyr
+
+# Enable debug mode
+CONFIG_DEBUG=y
+
+# Enable debug logging
+CONFIG_LOG_MODE_IMMEDIATE=y
+CONFIG_LOG_DEFAULT_LEVEL=4
+
+# Workaround for TLS credentials issue fixed upstream
+CONFIG_TLS_CREDENTIALS_LOG_LEVEL_INF=y
+
+# Enable assertions
+CONFIG_ASSERT=y
+CONFIG_ASSERT_VERBOSE=y
+
+# Enable stack overflow detection
+CONFIG_STACK_SENTINEL=y
+
+# Enable thread monitoring
+CONFIG_THREAD_MONITOR=y
+CONFIG_THREAD_NAME=y
+
+# Disable compiler optimizations
+CONFIG_DEBUG_OPTIMIZATIONS=y
+
+# Enable additional LLEXT debugging
+CONFIG_LLEXT_LOG_LEVEL_DBG=y