diff --git a/main/ot_example.c b/main/ot_example.c
index aaf9e3d..2cd30ef 100644
--- a/main/ot_example.c
+++ b/main/ot_example.c
@@ -12,8 +12,8 @@
 #include <esp_log.h>
 #include <esp_err.h>
 
-#define GPIO_OT_IN GPIO_NUM_21
-#define GPIO_OT_OUT GPIO_NUM_22
+#define GPIO_OT_IN CONFIG_OT_IN_PIN
+#define GPIO_OT_OUT CONFIG_OT_OUT_PIN
 #define ESP_INTR_FLAG_DEFAULT 0
 
 volatile float dhwTemp = 0;