diff --git a/src/uart.c b/src/uart.c
--- a/src/uart.c
+++ b/src/uart.c
@@ -39,6 +39,15 @@ void uart_init(void)
     huart1.AdvancedInit.DMADisableonRxError = UART_ADVFEATURE_DMA_DISABLEONRXERROR;
     HAL_UART_Init(&huart1);
 
+    HAL_Delay(100);
+	uint8_t switch_baud[] = "$PUBX,41,1,0003,0001,115200,0*1E\r\n";
+	HAL_UART_Transmit(uart_gethandle(), switch_baud, sizeof(switch_baud)/sizeof(uint8_t), 1000);
+
+    HAL_UART_DeInit(&huart1);
+    huart1.Init.BaudRate = 115200;
+    HAL_UART_Init(&huart1);
+
+
 //
 //    __DMA1_CLK_ENABLE();
 //