diff --git a/include/serial_AT.hpp b/include/serial_AT.hpp
index a26ea9e..0182c5f 100644
--- a/include/serial_AT.hpp
+++ b/include/serial_AT.hpp
@@ -30,3 +30,5 @@ void stop_serial_at();
 
 void start_http_server(int port);
 void stop_http_server();
+
+RadioInfo get_radio_info();
diff --git a/src/mqtt_client_wrapper.cpp b/src/mqtt_client_wrapper.cpp
index 1905e99..a1ba0aa 100644
--- a/src/mqtt_client_wrapper.cpp
+++ b/src/mqtt_client_wrapper.cpp
@@ -11,6 +11,7 @@
 
 #include "record_manager.hpp"
 #include "rtmp_manager.hpp"
+#include "serial_AT.hpp"
 
 std::shared_ptr<MQTTClient> mqtt_client;
 
@@ -59,6 +60,20 @@ static void send_heartbeat()
                                         : (running_count == total ? 1 : 2);  // 全部正常 or 部分异常
     hb["channels"] = channels;
 
+    // ===== 新增：读取 radio 信息（线程安全，返回拷贝）=====
+    RadioInfo ri = get_radio_info();
+
+    nlohmann::json hb;
+    hb["timestamp"] = ms;
+    hb["status"] = (running_count == 0) ? 0 : (running_count == total ? 1 : 2);
+    hb["channels"] = channels;
+
+    // ===== 新增：把 radio 塞进心跳 =====
+    hb["radio"] = {
+        {"state", ri.state}, {"rat", ri.rat},   {"pci", ri.pci},   {"band", ri.band}, {"arfcn", ri.arfcn},
+        {"rsrp", ri.rsrp},   {"rsrq", ri.rsrq}, {"sinr", ri.sinr}, {"raw", ri.raw},
+    };
+
     // 发布心跳
     mqtt_client->publish(g_app_config.mqtt.topics.heartbeat_up, hb.dump(), 0);
     // LOG_INFO("[MQTT] Sent video heartbeat (" + std::to_string(running_count) + "/" + std::to_string(total) +
diff --git a/src/serial_AT.cpp b/src/serial_AT.cpp
index 388c0f1..215659e 100644
--- a/src/serial_AT.cpp
+++ b/src/serial_AT.cpp
@@ -20,6 +20,12 @@ std::mutex imei_mutex;
 RadioInfo g_radio_info;
 static std::mutex radio_mutex;
 
+RadioInfo get_radio_info()
+{
+    std::lock_guard<std::mutex> lk(radio_mutex);
+    return g_radio_info;
+}
+
 // ================== 运行控制 ==================
 static std::atomic<bool> serial_at_running{false};
 
@@ -151,10 +157,11 @@ static void parse_qeng_servingcell(const std::string& line)
         g_radio_info.rat = rat;
 
         g_radio_info.pci = pci;
+        g_radio_info.band = band;
+        g_radio_info.arfcn = arfcn;
         g_radio_info.rsrp = rsrp;
         g_radio_info.rsrq = rsrq;
         g_radio_info.sinr = sinr;
-        g_radio_info.arfcn = arfcn;
         g_radio_info.raw = line;
     }