diff --git a/esphome/components/mqtt/mqtt_component.cpp b/esphome/components/mqtt/mqtt_component.cpp
index bb46ce732d..295fbba5e5 100644
--- a/esphome/components/mqtt/mqtt_component.cpp
+++ b/esphome/components/mqtt/mqtt_component.cpp
@@ -150,12 +150,40 @@ bool MQTTComponent::send_discovery_() {
         const std::string &node_area = App.get_area();
 
         JsonObject device_info = root.createNestedObject(MQTT_DEVICE);
-        device_info[MQTT_DEVICE_IDENTIFIERS] = get_mac_address();
+        const auto mac = get_mac_address();
+        device_info[MQTT_DEVICE_IDENTIFIERS] = mac;
         device_info[MQTT_DEVICE_NAME] = node_friendly_name;
-        device_info[MQTT_DEVICE_SW_VERSION] = "esphome v" ESPHOME_VERSION " " + App.get_compilation_time();
+#ifdef ESPHOME_PROJECT_NAME
+        device_info[MQTT_DEVICE_SW_VERSION] = ESPHOME_PROJECT_VERSION " (ESPHome " ESPHOME_VERSION ")";
+        const char *model = std::strchr(ESPHOME_PROJECT_NAME, '.');
+        if (model == nullptr) {  // must never happen but check anyway
+          device_info[MQTT_DEVICE_MODEL] = ESPHOME_BOARD;
+          device_info[MQTT_DEVICE_MANUFACTURER] = ESPHOME_PROJECT_NAME;
+        } else {
+          device_info[MQTT_DEVICE_MODEL] = model + 1;
+          device_info[MQTT_DEVICE_MANUFACTURER] = std::string(ESPHOME_PROJECT_NAME, model - ESPHOME_PROJECT_NAME);
+        }
+#else
+        device_info[MQTT_DEVICE_SW_VERSION] = ESPHOME_VERSION " (" + App.get_compilation_time() + ")";
         device_info[MQTT_DEVICE_MODEL] = ESPHOME_BOARD;
-        device_info[MQTT_DEVICE_MANUFACTURER] = "espressif";
-        device_info[MQTT_DEVICE_SUGGESTED_AREA] = node_area;
+#if defined(USE_ESP8266) || defined(USE_ESP32)
+        device_info[MQTT_DEVICE_MANUFACTURER] = "Espressif";
+#elif defined(USE_RP2040)
+        device_info[MQTT_DEVICE_MANUFACTURER] = "Raspberry Pi";
+#elif defined(USE_BK72XX)
+        device_info[MQTT_DEVICE_MANUFACTURER] = "Beken";
+#elif defined(USE_RTL87XX)
+        device_info[MQTT_DEVICE_MANUFACTURER] = "Realtek";
+#elif defined(USE_HOST)
+        device_info[MQTT_DEVICE_MANUFACTURER] = "Host";
+#endif
+#endif
+        if (!node_area.empty()) {
+          device_info[MQTT_DEVICE_SUGGESTED_AREA] = node_area;
+        }
+
+        device_info[MQTT_DEVICE_CONNECTIONS][0][0] = "mac";
+        device_info[MQTT_DEVICE_CONNECTIONS][0][1] = mac;
       },
       this->qos_, discovery_info.retain);
 }
diff --git a/esphome/components/mqtt/mqtt_const.h b/esphome/components/mqtt/mqtt_const.h
index 0e063c66d2..71f169fbe8 100644
--- a/esphome/components/mqtt/mqtt_const.h
+++ b/esphome/components/mqtt/mqtt_const.h
@@ -62,6 +62,7 @@ constexpr const char *const MQTT_DEVICE_MODEL = "mdl";
 constexpr const char *const MQTT_DEVICE_NAME = "name";
 constexpr const char *const MQTT_DEVICE_SUGGESTED_AREA = "sa";
 constexpr const char *const MQTT_DEVICE_SW_VERSION = "sw";
+constexpr const char *const MQTT_DEVICE_HW_VERSION = "hw";
 constexpr const char *const MQTT_DOCKED_TEMPLATE = "dock_tpl";
 constexpr const char *const MQTT_DOCKED_TOPIC = "dock_t";
 constexpr const char *const MQTT_EFFECT_COMMAND_TOPIC = "fx_cmd_t";
@@ -322,6 +323,7 @@ constexpr const char *const MQTT_DEVICE_MODEL = "model";
 constexpr const char *const MQTT_DEVICE_NAME = "name";
 constexpr const char *const MQTT_DEVICE_SUGGESTED_AREA = "suggested_area";
 constexpr const char *const MQTT_DEVICE_SW_VERSION = "sw_version";
+constexpr const char *const MQTT_DEVICE_HW_VERSION = "hw_version";
 constexpr const char *const MQTT_DOCKED_TEMPLATE = "docked_template";
 constexpr const char *const MQTT_DOCKED_TOPIC = "docked_topic";
 constexpr const char *const MQTT_EFFECT_COMMAND_TOPIC = "effect_command_topic";