diff --git a/src/PPPoS.c b/src/PPPoS.c
index 6a74948..2f49c57 100644
--- a/src/PPPoS.c
+++ b/src/PPPoS.c
@@ -23,9 +23,9 @@
 // UART configuration
 #define UART_PORT_NUM  UART_NUM_2
 #define UART_BAUD_RATE 115200
-#define UART_RX_PIN    18
-#define UART_TX_PIN    17
-#define UART_BUF_SIZE  12000
+#define UART_RX_PIN    2
+#define UART_TX_PIN    1
+#define UART_BUF_SIZE  4096
 
 #ifdef CONFIG_WEBGUIAPP_PPPOS_ENABLE