diff --git a/cores/asr650x/Serial/HardwareSerial.cpp b/cores/asr650x/Serial/HardwareSerial.cpp
index ba2524cc..e059fc35 100644
--- a/cores/asr650x/Serial/HardwareSerial.cpp
+++ b/cores/asr650x/Serial/HardwareSerial.cpp
@@ -61,8 +61,8 @@ void HardwareSerial::begin(unsigned long baud , uint32_t config, int8_t uart_num
 	
 	if( _uart_num == UART_NUM_0) 
 	{
-		if(digitalRead(UART_RX)==UART_RX_LEVEL)//uart start when uart chip powered
-		{
+		//if(digitalRead(UART_RX)==UART_RX_LEVEL)//uart start when uart chip powered
+		//{
 			uint32_t div = (float)CYDEV_BCLK__HFCLK__HZ/SerialBaud/UART_1_UART_OVS_FACTOR + 0.5 - 1;
 			UART_1_Start();
 			UART_1_SCBCLK_DIV_REG = div<<8;
@@ -70,7 +70,7 @@ void HardwareSerial::begin(unsigned long baud , uint32_t config, int8_t uart_num
 			UART_1_RX_CTRL_REG =rx_ctrl1;
 			UART_1_UART_TX_CTRL_REG =tx_ctrl0;
 			UART_1_TX_CTRL_REG = tx_ctrl1;
-		}
+		//}
 	}
 	else
 	{
diff --git a/cores/asr650x/device/asr6501_lrwan/radio.c b/cores/asr650x/device/asr6501_lrwan/radio.c
index d38e4730..5fcf9220 100644
--- a/cores/asr650x/device/asr6501_lrwan/radio.c
+++ b/cores/asr650x/device/asr6501_lrwan/radio.c
@@ -1118,11 +1118,13 @@ void RadioOnCadTimeoutIrq( void )
         RadioEvents->CadDone( 0 );
     }
 }
-
+extern uint8 UART_1_initVar;
 extern void enableUart(void);
 void RadioOnDioIrq( void )
 {
 	pinMode(P4_1,INPUT);
+	if(UART_1_initVar)
+		pinMode(P3_1,OUTPUT_PULLUP);
 	IrqFired = true;
 	RadioIrqProcess();
 }
diff --git a/cores/asr650x/loramac/mac/region/RegionCN470.c b/cores/asr650x/loramac/mac/region/RegionCN470.c
index 247020f0..89ff5e1a 100644
--- a/cores/asr650x/loramac/mac/region/RegionCN470.c
+++ b/cores/asr650x/loramac/mac/region/RegionCN470.c
@@ -556,7 +556,7 @@ bool RegionCN470TxConfig( TxConfigParams_t* txConfig, int8_t* txPower, TimerTime
     // Setup the radio frequency
     Radio.SetChannel( Channels[txConfig->Channel].Frequency );
 
-    Radio.SetTxConfig( MODEM_LORA, phyTxPower, 0, 0, phyDr, 1, 16, false, true, 0, 0, false, 3000 );
+    Radio.SetTxConfig( MODEM_LORA, phyTxPower, 0, 0, phyDr, 1, 16, false, true, 0, 0, false, 4000 );
     FREQ_PRINTF("TX on freq %u Hz at DR %d power %d\r\n", (unsigned int)Channels[txConfig->Channel].Frequency, txConfig->Datarate,phyTxPower);
 
     // Setup maximum payload lenght of the radio driver
diff --git a/cores/asr650x/loramac/system/low_power.c b/cores/asr650x/loramac/system/low_power.c
index 34773fc6..ba541f89 100644
--- a/cores/asr650x/loramac/system/low_power.c
+++ b/cores/asr650x/loramac/system/low_power.c
@@ -110,6 +110,7 @@ uint32_t LowPower_GetState( void )
  */
 extern uint32_t systime;
 extern void systemTimer();
+extern uint8 UART_1_initVar;
 
 void lowPowerHandler( void )
 {
@@ -118,6 +119,8 @@ void lowPowerHandler( void )
     if (LowPower_State == 0 && wakeByUart == false) {
         DBG_PRINTF_CRITICAL("dz\n\r");
         pinMode(P4_1,ANALOG);// SPI0  MISO;
+        if(UART_1_initVar)
+            pinMode(P3_1,ANALOG);
         aos_lrwan_chg_mode.enter_stop_mode();
         /* mcu dependent. to be implemented by user*/
         aos_lrwan_chg_mode.exit_stop_mode();
@@ -125,6 +128,8 @@ void lowPowerHandler( void )
         CySysTickSetCallback(4,systemTimer);
         systime = (uint32_t)TimerGetCurrentTime();
         pinMode(P4_1,INPUT);
+        if(UART_1_initVar)
+            pinMode(P3_1,OUTPUT_PULLUP);
     } else {
         //DBG_PRINTF_CRITICAL("z\n\r");
         aos_lrwan_chg_mode.enter_sleep_mode();
diff --git a/cores/asr650x/projects/CubeCellLib.a b/cores/asr650x/projects/CubeCellLib.a
index 7f9aad64..da26ff4f 100644
Binary files a/cores/asr650x/projects/CubeCellLib.a and b/cores/asr650x/projects/CubeCellLib.a differ
diff --git a/cores/asr650x/projects/PSoC4/CyLFClk.c b/cores/asr650x/projects/PSoC4/CyLFClk.c
index b362261b..c6d487bb 100644
--- a/cores/asr650x/projects/PSoC4/CyLFClk.c
+++ b/cores/asr650x/projects/PSoC4/CyLFClk.c
@@ -2863,6 +2863,8 @@ cystatus CySysClkIloRestoreFactoryTrim(void)
         }
     }
 
+extern uint8 UART_1_initVar;
+
     /*******************************************************************************
     * Function Name: CySysTimerIsr
     ****************************************************************************//**
@@ -2891,6 +2893,8 @@ cystatus CySysClkIloRestoreFactoryTrim(void)
                 if(cySysTimerCallback[CY_SYS_TIMER0] != (void *) 0)
                 {
                      pinMode(P4_1,INPUT);
+                     if(UART_1_initVar)
+                         pinMode(P3_1, OUTPUT_PULLUP);
                     (void)(cySysTimerCallback[CY_SYS_TIMER0])();
                 }
             }
@@ -2906,6 +2910,8 @@ cystatus CySysClkIloRestoreFactoryTrim(void)
                 if(cySysTimerCallback[CY_SYS_TIMER1] != (void *) 0)
                 {
                      pinMode(P4_1,INPUT);
+                     if(UART_1_initVar)
+                         pinMode(P3_1, OUTPUT_PULLUP);
                     (void)(cySysTimerCallback[CY_SYS_TIMER1])();
                 }
             }
@@ -2919,6 +2925,8 @@ cystatus CySysClkIloRestoreFactoryTrim(void)
                 if(cySysTimerCallback[CY_SYS_TIMER2] != (void *) 0)
                 {
                      pinMode(P4_1,INPUT);
+                     if(UART_1_initVar)
+                         pinMode(P3_1, OUTPUT_PULLUP);
                     (void)(cySysTimerCallback[CY_SYS_TIMER2])();
                 }
             }