diff --git a/zephyr/iut_test/app.overlay b/zephyr/iut_test/app.overlay
new file mode 100644
index 0000000..0a2026b
--- /dev/null
+++ b/zephyr/iut_test/app.overlay
@@ -0,0 +1,5 @@
+/ {
+	chosen {
+		zephyr.log-i2c=&i2c0;
+	};
+};
diff --git a/zephyr/iut_test/prj.conf b/zephyr/iut_test/prj.conf
index 58e08cd..6e47a10 100644
--- a/zephyr/iut_test/prj.conf
+++ b/zephyr/iut_test/prj.conf
@@ -23,6 +23,11 @@ CONFIG_SHELL_THREAD_PRIORITY=13
 # debug
 #CONFIG_NO_OPTIMIZATIONS=y
 
+# logging
+CONFIG_LOG=y
+CONFIG_LOG_PRINTK=y
+CONFIG_LOG_BACKEND_I2C=y
+
 # DMA
 CONFIG_DMA=y