diff --git a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx
index 7ce8cd66..2da926f1 100644
--- a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx
+++ b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx
@@ -145,7 +145,7 @@
         <SetRegEntry>
           <Number>0</Number>
           <Key>ST-LINKIII-KEIL_SWO</Key>
-          <Name>-U303030303030303030303031 -O10446 -SF4000 -C0 -A0 -I0 -HNlocalhost -HP7184 -P1 -N00("ARM CoreSight SW-DP") -D00(2BA01477) -L00(0) -TO18 -TC10000000 -TP21 -TDS8007 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -FO15 -FD20000000 -FC1000 -FN1 -FF0STM32L4xx_256.FLM -FS08000000 -FL040000 -FP0($$Device:STM32L431RCTx$CMSIS\Flash\STM32L4xx_256.FLM)</Name>
+          <Name>-U51FF68064965575333151687 -O10446 -SF10000 -C0 -A0 -I0 -HNlocalhost -HP7184 -P1 -N00("ARM CoreSight SW-DP (ARM Core") -D00(2BA01477) -L00(0) -TO131090 -TC10000000 -TT10000000 -TP21 -TDS8007 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -FO15 -FD20000000 -FC1000 -FN1 -FF0STM32L4xx_256.FLM -FS08007800 -FL019000 -FP0($$Device:STM32L431RCTx$CMSIS\Flash\STM32L4xx_256.FLM)</Name>
         </SetRegEntry>
       </TargetDriverDllRegistry>
       <Breakpoint/>
@@ -213,7 +213,7 @@
       <pMultCmdsp></pMultCmdsp>
       <DebugDescription>
         <Enable>1</Enable>
-        <EnableFlashSeq>1</EnableFlashSeq>
+        <EnableFlashSeq>0</EnableFlashSeq>
         <EnableLog>0</EnableLog>
         <Protocol>2</Protocol>
         <DbgClock>10000000</DbgClock>
@@ -383,7 +383,7 @@
 
   <Group>
     <GroupName>examples</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -699,7 +699,7 @@
 
   <Group>
     <GroupName>Drivers/CMSIS</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -1283,7 +1283,7 @@
 
   <Group>
     <GroupName>ota_download</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
diff --git a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx
index 4a23b42a..8258754b 100644
--- a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx
+++ b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx
@@ -275,8 +275,8 @@
               </OCR_RVCT3>
               <OCR_RVCT4>
                 <Type>1</Type>
-                <StartAddress>0x8008000</StartAddress>
-                <Size>0x40000</Size>
+                <StartAddress>0x8007800</StartAddress>
+                <Size>0x19000</Size>
               </OCR_RVCT4>
               <OCR_RVCT5>
                 <Type>1</Type>
diff --git a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/MDK-ARM/TencentOS_tiny.uvoptx b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/MDK-ARM/TencentOS_tiny.uvoptx
index cfe53ca9..ef476d8f 100644
--- a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/MDK-ARM/TencentOS_tiny.uvoptx
+++ b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/MDK-ARM/TencentOS_tiny.uvoptx
@@ -184,22 +184,6 @@
         <Bp>
           <Number>2</Number>
           <Type>0</Type>
-          <LineNumber>63</LineNumber>
-          <EnabledFlag>1</EnabledFlag>
-          <Address>134240906</Address>
-          <ByteObject>0</ByteObject>
-          <HtxType>0</HtxType>
-          <ManyObjects>0</ManyObjects>
-          <SizeOfObject>0</SizeOfObject>
-          <BreakByAccess>0</BreakByAccess>
-          <BreakIfRCount>1</BreakIfRCount>
-          <Filename>..\Src\main.c</Filename>
-          <ExecCommand></ExecCommand>
-          <Expression>\\TencentOS_tiny\../Src/main.c\63</Expression>
-        </Bp>
-        <Bp>
-          <Number>3</Number>
-          <Type>0</Type>
           <LineNumber>287</LineNumber>
           <EnabledFlag>1</EnabledFlag>
           <Address>134243064</Address>
@@ -214,23 +198,7 @@
           <Expression>\\TencentOS_tiny\../../../../../../components/ota/recovery/ota_recovery.c\287</Expression>
         </Bp>
         <Bp>
-          <Number>4</Number>
-          <Type>0</Type>
-          <LineNumber>61</LineNumber>
-          <EnabledFlag>1</EnabledFlag>
-          <Address>0</Address>
-          <ByteObject>0</ByteObject>
-          <HtxType>0</HtxType>
-          <ManyObjects>0</ManyObjects>
-          <SizeOfObject>0</SizeOfObject>
-          <BreakByAccess>0</BreakByAccess>
-          <BreakIfRCount>0</BreakIfRCount>
-          <Filename>..\Src\main.c</Filename>
-          <ExecCommand></ExecCommand>
-          <Expression></Expression>
-        </Bp>
-        <Bp>
-          <Number>5</Number>
+          <Number>3</Number>
           <Type>0</Type>
           <LineNumber>310</LineNumber>
           <EnabledFlag>0</EnabledFlag>
@@ -246,23 +214,7 @@
           <Expression></Expression>
         </Bp>
         <Bp>
-          <Number>6</Number>
-          <Type>0</Type>
-          <LineNumber>65</LineNumber>
-          <EnabledFlag>1</EnabledFlag>
-          <Address>0</Address>
-          <ByteObject>0</ByteObject>
-          <HtxType>0</HtxType>
-          <ManyObjects>0</ManyObjects>
-          <SizeOfObject>0</SizeOfObject>
-          <BreakByAccess>0</BreakByAccess>
-          <BreakIfRCount>0</BreakIfRCount>
-          <Filename>..\Src\main.c</Filename>
-          <ExecCommand></ExecCommand>
-          <Expression></Expression>
-        </Bp>
-        <Bp>
-          <Number>7</Number>
+          <Number>4</Number>
           <Type>0</Type>
           <LineNumber>120</LineNumber>
           <EnabledFlag>0</EnabledFlag>
@@ -277,6 +229,22 @@
           <ExecCommand></ExecCommand>
           <Expression></Expression>
         </Bp>
+        <Bp>
+          <Number>5</Number>
+          <Type>0</Type>
+          <LineNumber>63</LineNumber>
+          <EnabledFlag>1</EnabledFlag>
+          <Address>0</Address>
+          <ByteObject>0</ByteObject>
+          <HtxType>0</HtxType>
+          <ManyObjects>0</ManyObjects>
+          <SizeOfObject>0</SizeOfObject>
+          <BreakByAccess>0</BreakByAccess>
+          <BreakIfRCount>0</BreakIfRCount>
+          <Filename>..\Src\main.c</Filename>
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
+        </Bp>
       </Breakpoint>
       <WatchWindow1>
         <Ww>
diff --git a/examples/ota_download_through_http/ota_download_through_http_sample.c b/examples/ota_download_through_http/ota_download_through_http_sample.c
index 4bbe2cb2..50ef4c55 100644
--- a/examples/ota_download_through_http/ota_download_through_http_sample.c
+++ b/examples/ota_download_through_http/ota_download_through_http_sample.c
@@ -25,7 +25,7 @@ void user_task(void *arg)
     while (K_TRUE) {
         tos_task_delay(1000);
 
-        printf("do sth(v1.1)...\n");
+        printf("do sth(v0.1)...\n");
 
         if (++iter == 2) {
             printf("trigger ota download\n");
@@ -39,16 +39,16 @@ void ota_download_task(void *arg)
     tos_sem_pend(&sem, TOS_TIME_FOREVER);
 
     esp8266_sal_init(HAL_UART_PORT_0);
-    esp8266_join_ap("SheldonDai", "srnr6x9xbhmb0");
+    esp8266_join_ap("Mculover666", "mculover666");
 
-    uint32_t partition_addr = 0x08024800;
+    uint32_t partition_addr = 0x0803f800;
 
     if (ota_env_init(OTA_UPDATE_IN_POSITION, partition_addr, &stm32l4_norflash_onchip_drv_ota, &stm32l4_norflash_onchip_prop_ota) < 0) {
         printf("env init failed!\n");
         return;
     }
 
-    if (!ota_download_http("http://39.108.190.129:8000/patch.bin")) {
+    if (!ota_download_http("http://122.51.89.94:8000/patch.bin")) {
         printf("download successfully!\n");
     } else {
         printf("download failed!\n");