diff --git a/CHANGELOG_LATEST.md b/CHANGELOG_LATEST.md
index 72ee17c05..9168f2211 100644
--- a/CHANGELOG_LATEST.md
+++ b/CHANGELOG_LATEST.md
@@ -6,8 +6,11 @@ For more details go to [emsesp.org](https://emsesp.org/).
 
 ## Added
 
+- KM300 at address 0x4A [#3084](https://github.com/emsesp/EMS-ESP32/issues/3084)
+
 ## Fixed
 
 - signed value for solarInfuence [#3077](https://github.com/emsesp/EMS-ESP32/issues/3077)
+- set bin file upload limit to 1M again [3086](https://github.com/emsesp/EMS-ESP32/issues/3086)
 
 ## Changed
diff --git a/src/ESP32React/UploadFileService.cpp b/src/ESP32React/UploadFileService.cpp
index d600569b6..88786b739 100644
--- a/src/ESP32React/UploadFileService.cpp
+++ b/src/ESP32React/UploadFileService.cpp
@@ -48,7 +48,7 @@ void UploadFileService::handleUpload(AsyncWebServerRequest * request, const Stri
             // LittleFS filesystem image
             _is_filesystem = true;
             _md5[0]        = '\0'; // clear any stale md5 so Update.end() doesn't compare against it
-        } else if ((extension == "bin") && (filesize > 2000000)) {
+        } else if ((extension == "bin") && (filesize > 1000000)) {
             _is_firmware = true;
         } else if (extension == "json") {
             _md5[0] = '\0'; // clear md5
diff --git a/src/core/device_library.h b/src/core/device_library.h
index 2c291488c..4d5fee12c 100644
--- a/src/core/device_library.h
+++ b/src/core/device_library.h
@@ -187,8 +187,9 @@
 { 74, DeviceType::ALERT, "EM10", DeviceFlags::EMS_DEVICE_FLAG_NONE},
 
 // Gateways - 0x48
-{17, DeviceType::GATEWAY, "MX400", DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x48 and 0x4B
-{189, DeviceType::GATEWAY, "KM200, MB LAN 2", DeviceFlags::EMS_DEVICE_FLAG_NONE},
+{17, DeviceType::GATEWAY, "MX400", DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x48, 0x4B, or 0x50 as wireless base
+{189, DeviceType::GATEWAY, "KM200, MB LAN 2", DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x48
+{222, DeviceType::GATEWAY, "KM300,", DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x4A
 {252, DeviceType::GATEWAY, "K30RF, MX300", DeviceFlags::EMS_DEVICE_FLAG_NONE},
 
 // Generic - 0x40 or other with no product-id and no version
diff --git a/src/core/telegram.cpp b/src/core/telegram.cpp
index 9317882c9..a52e858e4 100644
--- a/src/core/telegram.cpp
+++ b/src/core/telegram.cpp
@@ -572,12 +572,11 @@ bool TxService::send_raw(const char * telegram_data) {
         return false;
     }
 
-    // since the telegram data is a const, make a copy. add 1 to grab the \0 EOS
-    char telegram[strlen(telegram_data) + 1];
-    strlcpy(telegram, telegram_data, sizeof(telegram));
+    // since the telegram data is a const, make a copy
+    char * telegram = strdup(telegram_data);
 
     uint8_t count = 0;
-    uint8_t data[2 + strlen(telegram) / 3];
+    uint8_t data[256]; // max raw telegram length
 
     // get values
     char * p = strtok(telegram, " ,"); // delimiter
@@ -585,7 +584,7 @@ bool TxService::send_raw(const char * telegram_data) {
         data[count++] = (uint8_t)strtol(p, 0, 16);
         p             = strtok(nullptr, " ,");
     }
-
+    free(telegram);
     // check valid length
     if (count < 4) {
         return false;
diff --git a/src/emsesp_version.h b/src/emsesp_version.h
index 62ba7a40a..99a25d00d 100644
--- a/src/emsesp_version.h
+++ b/src/emsesp_version.h
@@ -1 +1 @@
-#define EMSESP_APP_VERSION "3.8.3-dev.1"
+#define EMSESP_APP_VERSION "3.8.3-dev.3"