diff --git a/ESP32_AP-Flasher/data/www/index.html.gz b/ESP32_AP-Flasher/data/www/index.html.gz
index f57ec264..fe1abbdb 100644
Binary files a/ESP32_AP-Flasher/data/www/index.html.gz and b/ESP32_AP-Flasher/data/www/index.html.gz differ
diff --git a/ESP32_AP-Flasher/data/www/main.css.gz b/ESP32_AP-Flasher/data/www/main.css.gz
index ec8720cc..b6c94419 100644
Binary files a/ESP32_AP-Flasher/data/www/main.css.gz and b/ESP32_AP-Flasher/data/www/main.css.gz differ
diff --git a/ESP32_AP-Flasher/data/www/ota.js.gz b/ESP32_AP-Flasher/data/www/ota.js.gz
index 8ec977c4..39e25f46 100644
Binary files a/ESP32_AP-Flasher/data/www/ota.js.gz and b/ESP32_AP-Flasher/data/www/ota.js.gz differ
diff --git a/ESP32_AP-Flasher/src/espflasher.cpp b/ESP32_AP-Flasher/src/espflasher.cpp
index 1493b7c8..ee011645 100644
--- a/ESP32_AP-Flasher/src/espflasher.cpp
+++ b/ESP32_AP-Flasher/src/espflasher.cpp
@@ -121,7 +121,7 @@ bool downloadAndWriteBinary(String &filename, const char *url) {
     HTTPClient binaryHttp;
     Serial.println(url);
     binaryHttp.begin(url);
-
+    binaryHttp.setFollowRedirects(HTTPC_FORCE_FOLLOW_REDIRECTS);
     int binaryResponseCode = binaryHttp.GET();
     Serial.println(binaryResponseCode);
     if (binaryResponseCode == HTTP_CODE_OK) {
@@ -129,14 +129,26 @@ bool downloadAndWriteBinary(String &filename, const char *url) {
         if (file) {
             wsSerial("downloading " + String(filename));
             WiFiClient *stream = binaryHttp.getStreamPtr();
-            uint8_t buffer[128];
+            uint8_t buffer[256];
+            size_t totalBytesRead = 0;
             while (stream->available()) {
                 size_t bytesRead = stream->readBytes(buffer, sizeof(buffer));
                 file.write(buffer, bytesRead);
+                totalBytesRead += bytesRead;
+                vTaskDelay(1 / portTICK_PERIOD_MS);
             }
             file.close();
             binaryHttp.end();
-            return true;
+
+            file = contentFS->open(filename, "r");
+            if (file) {
+                if (totalBytesRead == file.size() && file.size() > 0) {
+                    file.close();
+                    return true;
+                }
+                wsSerial("Download failed, " + String(file.size()) + " bytes");
+                file.close();
+            }
         } else {
             wsSerial("file open error " + String(filename));
         }
@@ -167,8 +179,16 @@ bool doC6flash(uint8_t doDownload) {
                 for (JsonObject obj : jsonArray) {
                     String filename = "/" + obj["filename"].as<String>();
                     String binaryUrl = "https://raw.githubusercontent.com/jjwbruijn/OpenEPaperLink/master/binaries/ESP32-C6" + String(filename);
-                    if (!downloadAndWriteBinary(filename, binaryUrl.c_str())) {
-                        return false;
+                    for (int retry = 0; retry < 10; retry++) {
+                        if (downloadAndWriteBinary(filename, binaryUrl.c_str())) {
+                            break;
+                        }
+                        wsSerial("Retry " + String(retry));
+                        if (retry < 9) {
+                            delay(1000);
+                        } else {
+                            return false;
+                        }
                     }
                 }
             }
diff --git a/ESP32_AP-Flasher/src/serialap.cpp b/ESP32_AP-Flasher/src/serialap.cpp
index 614aa397..2f443d06 100644
--- a/ESP32_AP-Flasher/src/serialap.cpp
+++ b/ESP32_AP-Flasher/src/serialap.cpp
@@ -596,10 +596,10 @@ void rxSerialTask2(void* parameter) {
         vTaskDelay(1 / portTICK_PERIOD_MS);
 
         time_t currentTime = millis();
-        if (currentTime - startTime >= 2000) {
-            if (charCount > 2000) {
+        if (currentTime - startTime >= 1000) {
+            if (charCount > 6000) {
                 rxSerialStopTask2 = true;
-                Serial.println("Serial monitor stopped because of flooding");
+                Serial.println("Serial monitor stopped because of flooding (" + String(charCount) + " characters per second");
             }
             startTime = currentTime;
             charCount = 0;
diff --git a/ESP32_AP-Flasher/wwwroot/index.html b/ESP32_AP-Flasher/wwwroot/index.html
index 2a7040af..f81e5172 100644
--- a/ESP32_AP-Flasher/wwwroot/index.html
+++ b/ESP32_AP-Flasher/wwwroot/index.html
@@ -226,7 +226,7 @@ to save file system space">
 			<div id="releasetable"></div>
 			<div>
 				<div id="rollbackOption" style="display:none"><button id="rollbackBtn">Rollback to previous firmware</button></div>
-				<div id="updateC6Option"><button id="updateC6Btn">Update ESP32-C6</button> <input type="checkbox" value="1" checked id="c6download"> download latest version</div>
+				<span id="c6Option"><div id="updateC6Option"><button id="updateC6Btn">!! Update ESP32-C6</button> <input type="checkbox" value="1" checked id="c6download"> download latest version</div></span>
 			</div>
 		</div>
 	</div>
diff --git a/ESP32_AP-Flasher/wwwroot/main.css b/ESP32_AP-Flasher/wwwroot/main.css
index 38904656..b32f2ce8 100644
--- a/ESP32_AP-Flasher/wwwroot/main.css
+++ b/ESP32_AP-Flasher/wwwroot/main.css
@@ -571,6 +571,10 @@ ul.messages li.new {
 	background-color: #a0a0a0;
 }
 
+#c6Option {
+	display: none;
+}
+
 .console {
 	width: 100%;
 	background-color: black;
diff --git a/ESP32_AP-Flasher/wwwroot/ota.js b/ESP32_AP-Flasher/wwwroot/ota.js
index 4bba3b5d..6f3ce84a 100644
--- a/ESP32_AP-Flasher/wwwroot/ota.js
+++ b/ESP32_AP-Flasher/wwwroot/ota.js
@@ -50,6 +50,7 @@ export async function initUpdate() {
                 currentVer = data.buildversion;
                 currentBuildtime = data.buildtime;
                 if (data.rollback) $("#rollbackOption").style.display = 'block';
+                if (data.env == 'ESP32_S3_16_8_YELLOW_AP') $("#c6Option").style.display = 'block';
             }
         })
         .catch(error => {