diff --git a/CHANGELOG_LATEST.md b/CHANGELOG_LATEST.md
index 72ee17c05..434fa21d7 100644
--- a/CHANGELOG_LATEST.md
+++ b/CHANGELOG_LATEST.md
@@ -6,6 +6,8 @@ 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)
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/emsesp_version.h b/src/emsesp_version.h
index 62ba7a40a..626543ebd 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.2"