docs: add Quectel EC800K AT and TCP manuals

applications/VK_Client.c

@@ -31,6 +31,12 @@
 
 
 static char cmd_cmd[128] = {0};
+static uint8_t socket_tx_buffer[LTE_SOCKET_TX_CHUNK_SIZE];
+static uint8_t socket_rx_buffer[LTE_SOCKET_RX_CHUNK_SIZE];
+static rt_size_t socket_tx_pending = 0;
+static rt_tick_t last_ack_query_tick = 0;
+
+static void lte_diag_finish_disconnect(void);
 
 no_carrier_match_t _no_carrier_t = {0};
 
@@ -39,6 +45,14 @@ void client_tcp_close(Cclient_t *client) {
   char close_cmd[24];
 
   client->connect_sta = false;
+  BSP_LTE_SetDataTxPaused(true);
+  if (lte_diag.disconnect_report_pending) {
+    BSP_LTE_CollectNetworkSnapshot();
+    lte_diag_finish_disconnect();
+  }
+  BSP_LTE_ClearSocketEvents();
+  fmu_net_queue_reset();
+  socket_tx_pending = 0;
   rt_snprintf(close_cmd, sizeof(close_cmd), AT_QICLOSE, client->connect_ID);
   BSP_LTE_SendCmd(close_cmd, DEFAULT_EXPECT, DEFAULT_ERROR,
                   LTE_CMD_WAIT_QICLOSE);
@@ -149,6 +163,8 @@ static const char *disconnect_reason_name(lte_disconnect_reason_t reason) {
     case LTE_DISC_AT_TIMEOUT: return "AT_TIMEOUT";
     case LTE_DISC_QIOPEN_FAILED: return "QIOPEN_FAILED";
     case LTE_DISC_MODULE_RESET: return "MODULE_RESET";
+    case LTE_DISC_SERVER_SILENCE: return "SERVER_SILENCE";
+    case LTE_DISC_SOCKET_SEND: return "SOCKET_SEND";
     default: return "UNKNOWN";
   }
 }
@@ -167,6 +183,7 @@ void lte_diag_disconnect(lte_disconnect_reason_t reason) {
   lte_diag.disconnect_count++;
   lte_diag.last_disconnect_reason = reason;
   lte_diag.last_disconnect_tick = now;
+  lte_diag.disconnect_report_pending = true;
 
   LOG_I("[DISC] reason=%s count=%u connected_ticks=%u",
         disconnect_reason_name(reason), lte_diag.disconnect_count,
@@ -176,10 +193,24 @@ void lte_diag_disconnect(lte_disconnect_reason_t reason) {
         lte_diag.uart2_rx_events, lte_diag.uart2_write_failures,
         lte_diag.uart2_error_count, lte_diag.uart3_error_count,
         lte_diag.last_uart_error_code);
-  LOG_I("[DISC] fmu_rx=%u fmu_tx=%u server_rx=%u read_events=%u silence_timeout=%u",
-        lte_diag.fmu_rx_bytes, lte_diag.fmu_tx_bytes,
-        lte_diag.server_rx_bytes, lte_diag.server_rx_read_events,
-        lte_diag.server_silence_timeout_count);
+  LOG_I("[CONN] fmu_rx=%u fmu_tx=%u fmu_hb=%u server_rx=%u server_hb=%u events=%u",
+        lte_diag.fmu_rx_bytes - lte_diag.conn_fmu_rx_base,
+        lte_diag.fmu_tx_bytes - lte_diag.conn_fmu_tx_base,
+        lte_diag.fmu_heartbeats - lte_diag.conn_fmu_heartbeat_base,
+        lte_diag.server_rx_bytes - lte_diag.conn_server_rx_base,
+        lte_diag.server_heartbeats - lte_diag.conn_server_heartbeat_base,
+        lte_diag.server_rx_read_events - lte_diag.conn_server_events_base);
+  LOG_I("[CONN] socket_tx=%u send_ok=%u send_fail=%u prompt_timeout=%u read_errors=%u",
+        lte_diag.socket_tx_bytes - lte_diag.conn_socket_tx_base,
+        lte_diag.socket_send_ok - lte_diag.conn_send_ok_base,
+        lte_diag.socket_send_fail - lte_diag.conn_send_fail_base,
+        lte_diag.socket_prompt_timeouts,
+        lte_diag.socket_read_errors);
+  LOG_I("[DISC] acked=%u unacked=%u ack_queries=%u ack_errors=%u",
+        lte_diag.socket_acked_bytes, lte_diag.socket_unacked_bytes,
+        lte_diag.socket_ack_queries, lte_diag.socket_ack_errors);
+  LOG_I("[DISC] tx_queue_high=%u drops=%u",
+        lte_diag.tx_queue_high_water, lte_diag.tx_queue_drops);
   LOG_I("[DISC] age_uart2_rx=%u age_uart2_tx=%u age_fmu_rx=%u age_server_rx=%u",
         diag_age(now, lte_diag.last_uart2_rx_tick),
         diag_age(now, lte_diag.last_uart2_tx_tick),
@@ -191,13 +222,91 @@ void lte_diag_disconnect(lte_disconnect_reason_t reason) {
   LOG_I("[DISC] attempts=%u reconnects=%u qioopen_fail=%u resets=%u",
         lte_diag.connect_attempts, lte_diag.reconnect_count,
         lte_diag.qioopen_failures, lte_diag.reset_count);
-  LOG_I("[DISC] csq=%d cereg=%u pdp=%u heap=%u/%u min_free=%u",
-        lte_dev.csq, lte_dev.eps_sta, lte_dev.reset_flag == DTU_CF_NO_NEED_RESET,
-        heap_used, heap_total, heap_total - heap_max);
+  LOG_I("[DISC] heap=%u/%u min_free=%u", heap_used, heap_total,
+        heap_total - heap_max);
+
+  if (reason == LTE_DISC_AT_TIMEOUT || reason == LTE_DISC_QIOPEN_FAILED ||
+      reason == LTE_DISC_MODULE_RESET) {
+    const char *classification = reason == LTE_DISC_QIOPEN_FAILED
+                                     ? "SOCKET_OPEN"
+                                     : "MODEM_OR_DEVICE";
+    LOG_I("[CLASS] class=%s confidence=MEDIUM net_snapshot=unavailable",
+          classification);
+    lte_diag.disconnect_report_pending = false;
+  }
 
   lte_dev.client1->connect_sta = false;
 }
 
+static const char *diag_text_or_unknown(const char *text) {
+  return text[0] == '\0' ? "?" : text;
+}
+
+static void lte_diag_finish_disconnect(void) {
+  const lte_network_snapshot_t *network = &lte_diag.network;
+  rt_tick_t now = lte_diag.last_disconnect_tick;
+  rt_uint32_t connected_ms = now - lte_diag.connect_tick;
+  rt_uint32_t fmu_hb =
+      lte_diag.fmu_heartbeats - lte_diag.conn_fmu_heartbeat_base;
+  rt_uint32_t server_hb =
+      lte_diag.server_heartbeats - lte_diag.conn_server_heartbeat_base;
+  rt_uint32_t ack_queries =
+      lte_diag.socket_ack_queries - lte_diag.conn_ack_queries_base;
+  const char *classification = "UNKNOWN";
+  const char *confidence = "LOW";
+  const char *evidence = "insufficient";
+  bool registration_bad = network->cereg >= 0 && network->cereg != 1 &&
+                          network->cereg != 5;
+
+  LOG_I("[NET] oper=%s rat=%s band=%s channel=%u tac=%s cell=%s",
+        diag_text_or_unknown(network->oper),
+        diag_text_or_unknown(network->rat),
+        diag_text_or_unknown(network->band), network->channel,
+        diag_text_or_unknown(network->tac),
+        diag_text_or_unknown(network->cell));
+  LOG_I("[NET] cereg=%d cgatt=%d pdp=%d csq=%d pdpdeact=%u",
+        network->cereg, network->cgatt, network->pdp, network->csq,
+        lte_dev.socket_pdpdeact_pending ? 1 : 0);
+  LOG_I("[PATH] acked=%u unacked=%u ack_queries=%u last_ack_age_ms=%u queue_drops=%u",
+        lte_diag.socket_acked_bytes, lte_diag.socket_unacked_bytes,
+        ack_queries, diag_age(now, lte_diag.last_socket_ack_tick),
+        lte_diag.tx_queue_drops - lte_diag.conn_queue_drops_base);
+
+  if (lte_dev.socket_pdpdeact_pending || registration_bad ||
+      network->cgatt == 0 || network->pdp == 0) {
+    classification = "CELLULAR";
+    confidence = "HIGH";
+    evidence = lte_dev.socket_pdpdeact_pending ? "pdpdeact" : "registration";
+  } else if (connected_ms >= 25000 && connected_ms <= 40000 &&
+             fmu_hb == 0 && server_hb >= 5 &&
+             lte_diag.socket_unacked_bytes == 0) {
+    classification = "SERVER_POLICY";
+    confidence = "HIGH";
+    evidence = "no_fmu_hb_30s";
+  } else if (lte_diag.socket_unacked_bytes > 0) {
+    classification = "IP_PATH";
+    confidence = "MEDIUM";
+    evidence = "tcp_unacked";
+  } else if (lte_diag.last_disconnect_reason == LTE_DISC_SERVER_SILENCE) {
+    classification = "SERVER_OR_DOWNLINK";
+    confidence = "MEDIUM";
+    evidence = "server_silence";
+  } else if (lte_diag.last_disconnect_reason == LTE_DISC_SOCKET_SEND) {
+    classification = "MODEM_OR_SOCKET";
+    confidence = "MEDIUM";
+    evidence = "socket_send_fail";
+  } else if (ack_queries > 0 && lte_diag.socket_unacked_bytes == 0 &&
+             diag_age(now, lte_diag.last_server_rx_tick) <= 5000) {
+    classification = "REMOTE_CLOSE";
+    confidence = "MEDIUM";
+    evidence = "recent_rx_all_acked";
+  }
+
+  LOG_I("[CLASS] class=%s confidence=%s evidence=%s", classification,
+        confidence, evidence);
+  lte_diag.disconnect_report_pending = false;
+}
+
 
 /*将EC800K软件复位*/
 int16_t EC800K_Reset(void) {
@@ -211,11 +320,7 @@ int16_t EC800K_Reset(void) {
   lte_dev.client1->connect_sta = false;
   //lte_dev.client2->connect_sta = false;
 
-  rt_thread_mdelay(3000);
-  BSP_LTE_SendData((uint8_t *)"+++", 3);
-  rt_thread_mdelay(2000);
-  BSP_LTE_SendData((uint8_t *)"+++", 3);
-  rt_thread_mdelay(2000);
+  rt_thread_mdelay(1000);
 
   uint8_t try_count = 5;
 
@@ -261,9 +366,9 @@ int16_t client_tcp_connect(Cclient_t *client) {
     BSP_LTE_InitLogClock();
 
     //
-    BSP_LTE_SendCmd(AT_CFG_TRANS_SIZE, DEFAULT_EXPECT, DEFAULT_ERROR,
+    BSP_LTE_SendCmd(AT_CFG_RECV_IND, DEFAULT_EXPECT, DEFAULT_ERROR,
                     LTE_CMD_WAIT_NORMAL);
-    BSP_LTE_SendCmd(AT_CFG_TRANS_WAITTM, DEFAULT_EXPECT, DEFAULT_ERROR,
+    BSP_LTE_SendCmd(AT_QISDE0, DEFAULT_EXPECT, DEFAULT_ERROR,
                     LTE_CMD_WAIT_NORMAL);
     BSP_LTE_SendCmd(AT_CFG_PASSIVE_CLOSED, DEFAULT_EXPECT, DEFAULT_ERROR,
                     LTE_CMD_WAIT_NORMAL);
@@ -276,7 +381,7 @@ int16_t client_tcp_connect(Cclient_t *client) {
   
   // 2, 打开链接
   memset(cmd_cmd, 0, sizeof(cmd_cmd));
-  cmd_len = rt_snprintf(cmd_cmd, sizeof(cmd_cmd), AT_QIOPEN_TRANS,
+  cmd_len = rt_snprintf(cmd_cmd, sizeof(cmd_cmd), AT_QIOPEN_BUFFER,
                         client->connect_ID, client->mode, client->ip,
                         client->port);
   if (cmd_len < 0 || cmd_len >= (int)sizeof(cmd_cmd)) {
@@ -285,8 +390,7 @@ int16_t client_tcp_connect(Cclient_t *client) {
     return -1;
   }
   /* 透传模式成功返回 CONNECT；一次尝试只发送一次 QIOPEN。 */
-  while (0 != BSP_LTE_SendCmd(cmd_cmd, CONNECTE_OK, DEFAULT_ERROR,
-                              LTE_CMD_WAIT_QIOPEN)) {
+  while (0 != BSP_LTE_OpenSocket(cmd_cmd, client->connect_ID)) {
     lte_diag.qioopen_failures++;
     client_tcp_close(client);
 #ifdef debug_mode
@@ -305,8 +409,12 @@ int16_t client_tcp_connect(Cclient_t *client) {
 #endif
   }
   client->connect_sta = true;
+  BSP_LTE_ClearSocketEvents();
+  fmu_net_queue_reset();
+  socket_tx_pending = 0;
   BSP_LTE_SetDataTxPaused(false);
   lte_diag_connect_success();
+  last_ack_query_tick = lte_diag.connect_tick;
   client->error_cnt = 0;
   lte_dev.reset_flag = DTU_CF_NO_NEED_RESET;
 
@@ -323,7 +431,7 @@ int16_t client_tcp_connect(Cclient_t *client) {
   mav_len = mavlink_msg_to_send_buffer(mav_buf, &msg);
 
   for (int i = 0; i < 3; i++) {
-    BSP_LTE_SendData(mav_buf, mav_len);
+    BSP_LTE_SendSocketData(client->connect_ID, mav_buf, mav_len);
   }
   rt_device_t fmu_com = fmu_com_get();
   if (fmu_com != RT_NULL) {
@@ -334,11 +442,11 @@ int16_t client_tcp_connect(Cclient_t *client) {
   rt_sprintf(buf, "{\"sn\":\"%s\",\"client_id\":\"%s\",\"csq\":\"%d\"}\r\n",
              lte_dev.iccid, lte_dev.imei, lte_dev.csq);
 
-  BSP_LTE_SendData((uint8_t *)buf, sizeof(buf));
+  BSP_LTE_SendSocketData(client->connect_ID, (uint8_t *)buf, sizeof(buf));
 
-  BSP_LTE_SendData((uint8_t *)buf, sizeof(buf));
+  BSP_LTE_SendSocketData(client->connect_ID, (uint8_t *)buf, sizeof(buf));
 
-  BSP_LTE_SendData((uint8_t *)buf, sizeof(buf));
+  BSP_LTE_SendSocketData(client->connect_ID, (uint8_t *)buf, sizeof(buf));
 
  //hw_printf(buf);
 #endif
@@ -350,37 +458,7 @@ int16_t client_tcp_connect(Cclient_t *client) {
 static rt_tick_t last_rx_tick = 0;
 #endif
 
-/* Leave transparent mode only after the UART has been quiet for the
- * required guard time.  The caller keeps data_tx_paused asserted until the
- * next successful QIOPEN. */
-static bool client_exit_transparent_mode(CLte_dev_t *pLte_dev) {
-  rt_tick_t deadline;
-  rt_ssize_t len;
-
-  BSP_LTE_SetDataTxPaused(true);
-  rt_thread_mdelay(1000);
-  BSP_LTE_SendData((uint8_t *)"+++", 3);
-  rt_thread_mdelay(1000);
-
-  deadline = rt_tick_get() + 2000;
-  while ((rt_int32_t)(rt_tick_get() - deadline) < 0) {
-    if (pLte_dev->com_dev_rx_sem != RT_NULL) {
-      rt_sem_take(pLte_dev->com_dev_rx_sem, 100);
-    }
-    rt_memset(pLte_dev->at_buf, 0, sizeof(pLte_dev->at_buf));
-    len = rt_device_read(pLte_dev->com_dev, 0, pLte_dev->at_buf,
-                         sizeof(pLte_dev->at_buf) - 1);
-    if (len > 0) {
-      lte_diag_uart2_rx((rt_size_t)len);
-      pLte_dev->at_buf[len] = '\0';
-      if (rt_strstr((const char *)pLte_dev->at_buf, DEFAULT_EXPECT) != RT_NULL) {
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
+#if 0
 void client_yield(CLte_dev_t *pLte_dev) {
   while (1) {
     if (pLte_dev->client1->connect_sta == true) {
@@ -437,9 +515,7 @@ void client_yield(CLte_dev_t *pLte_dev) {
             }
 
             rt_device_t fmu_com = fmu_com_get();
-            lte_diag.server_rx_bytes += len;
-            lte_diag.server_rx_read_events++;
-            lte_diag.last_server_rx_tick = rt_tick_get();
+            lte_diag_server_data(pLte_dev->at_buf, len);
             if (fmu_com) {
               rt_ssize_t written = rt_device_write(fmu_com, 0,
                                                    pLte_dev->at_buf, len);
@@ -468,6 +544,94 @@ void client_yield(CLte_dev_t *pLte_dev) {
   }
 
 }
+#endif
+
+void client_yield(CLte_dev_t *pLte_dev) {
+  while (1) {
+    if (pLte_dev->client1->connect_sta == true) {
+      int16_t socket_result;
+
+      BSP_LTE_PollSocketUrc(20);
+      if (pLte_dev->socket_closed_pending) {
+        LOG_W("[URC] socket closed received");
+        lte_diag_disconnect(LTE_DISC_CLOSED);
+        client_tcp_close(pLte_dev->client1);
+        continue;
+      }
+
+      while (pLte_dev->socket_recv_pending &&
+             pLte_dev->client1->connect_sta) {
+        rt_device_t fmu_com;
+        int16_t read_length = BSP_LTE_ReadSocketData(
+            pLte_dev->client1->connect_ID, socket_rx_buffer,
+            sizeof(socket_rx_buffer));
+        if (read_length < 0) {
+          lte_diag_disconnect(pLte_dev->socket_closed_pending
+                                  ? LTE_DISC_CLOSED
+                                  : LTE_DISC_AT_TIMEOUT);
+          client_tcp_close(pLte_dev->client1);
+          break;
+        }
+        if (read_length == 0) break;
+
+        lte_diag_server_data(socket_rx_buffer, read_length);
+#if LTE_SERVER_SILENCE_TIMEOUT_SEC > 0
+        last_rx_tick = lte_diag.last_server_rx_tick;
+#endif
+        fmu_com = fmu_com_get();
+        if (fmu_com != RT_NULL) {
+          rt_ssize_t written = rt_device_write(fmu_com, 0, socket_rx_buffer,
+                                               read_length);
+          if (written > 0) lte_diag_fmu_tx((rt_size_t)written);
+        }
+        if (read_length == sizeof(socket_rx_buffer))
+          pLte_dev->socket_recv_pending = true;
+      }
+      if (!pLte_dev->client1->connect_sta) continue;
+
+      if (socket_tx_pending == 0) {
+        socket_tx_pending = fmu_net_queue_get(socket_tx_buffer,
+                                              sizeof(socket_tx_buffer));
+      }
+      if (socket_tx_pending > 0) {
+        socket_result = BSP_LTE_SendSocketData(
+            pLte_dev->client1->connect_ID, socket_tx_buffer,
+            (uint16_t)socket_tx_pending);
+        if (socket_result == 0) {
+          socket_tx_pending = 0;
+        } else if (socket_result < 0) {
+          lte_diag_disconnect(LTE_DISC_SOCKET_SEND);
+          client_tcp_close(pLte_dev->client1);
+          continue;
+        } else {
+          rt_thread_mdelay(50);
+        }
+      }
+
+      if (rt_tick_get() - last_ack_query_tick >= RT_TICK_PER_SECOND * 5) {
+        last_ack_query_tick = rt_tick_get();
+        BSP_LTE_QuerySocketSendStatus(pLte_dev->client1->connect_ID);
+      }
+
+#if LTE_SERVER_SILENCE_TIMEOUT_SEC > 0
+      if (rt_tick_get() - last_rx_tick >
+          RT_TICK_PER_SECOND * LTE_SERVER_SILENCE_TIMEOUT_SEC) {
+        lte_diag.server_silence_timeout_count++;
+        LOG_W("server silence timeout, reconnect\n");
+        lte_diag_disconnect(LTE_DISC_SERVER_SILENCE);
+        client_tcp_close(pLte_dev->client1);
+        continue;
+      }
+#endif
+    } else {
+      if (pLte_dev->reset_flag == DTU_CF_NEED_RESET) BSP_LTE_Config();
+      client_tcp_connect(pLte_dev->client1);
+#if LTE_SERVER_SILENCE_TIMEOUT_SEC > 0
+      last_rx_tick = rt_tick_get();
+#endif
+    }
+  }
+}
 
 void client_task(void) {
   client_yield(&lte_dev);

applications/VK_Com.c

@@ -3,6 +3,7 @@
 #include "drv_ec800k.h"
 #include "rtdef.h"
 #include "rtthread.h"
+#include <ipc/ringbuffer.h>
 
 #define ENABLE_MEMORY_USAGE_LOG 0
 
@@ -15,6 +16,12 @@
 rt_device_t fmu_com = RT_NULL;
 rt_sem_t fmu_com_rx_sem = RT_NULL;
 
+#define FMU_NET_QUEUE_SIZE 512
+static struct rt_ringbuffer fmu_net_queue;
+static struct rt_mutex fmu_net_queue_lock;
+static uint8_t fmu_net_queue_pool[FMU_NET_QUEUE_SIZE];
+static bool fmu_net_queue_ready = false;
+
 #if ENABLE_MEMORY_USAGE_LOG
 static rt_size_t thread_stack_used(rt_thread_t thread) {
   rt_uint8_t *stack;
@@ -69,9 +76,48 @@ int fmu_com_register(rt_device_t com_dev) {
 
   rt_device_set_rx_indicate(fmu_com, fmu_com_rx_cb);
 
+  if (!fmu_net_queue_ready) {
+    rt_ringbuffer_init(&fmu_net_queue, fmu_net_queue_pool,
+                       sizeof(fmu_net_queue_pool));
+    rt_mutex_init(&fmu_net_queue_lock, "fmuNet", RT_IPC_FLAG_PRIO);
+    fmu_net_queue_ready = true;
+  }
+
   return 0;
 }
 
+rt_size_t fmu_net_queue_put(const uint8_t *data, rt_size_t length) {
+  rt_size_t queued;
+  rt_size_t used;
+
+  if (!fmu_net_queue_ready || data == RT_NULL || length == 0) return 0;
+  rt_mutex_take(&fmu_net_queue_lock, RT_WAITING_FOREVER);
+  queued = rt_ringbuffer_put(&fmu_net_queue, data, length);
+  used = rt_ringbuffer_data_len(&fmu_net_queue);
+  rt_mutex_release(&fmu_net_queue_lock);
+
+  if (queued < length) lte_diag.tx_queue_drops += length - queued;
+  if (used > lte_diag.tx_queue_high_water) lte_diag.tx_queue_high_water = used;
+  return queued;
+}
+
+rt_size_t fmu_net_queue_get(uint8_t *data, rt_size_t length) {
+  rt_size_t read;
+
+  if (!fmu_net_queue_ready || data == RT_NULL || length == 0) return 0;
+  rt_mutex_take(&fmu_net_queue_lock, RT_WAITING_FOREVER);
+  read = rt_ringbuffer_get(&fmu_net_queue, data, length);
+  rt_mutex_release(&fmu_net_queue_lock);
+  return read;
+}
+
+void fmu_net_queue_reset(void) {
+  if (!fmu_net_queue_ready) return;
+  rt_mutex_take(&fmu_net_queue_lock, RT_WAITING_FOREVER);
+  rt_ringbuffer_reset(&fmu_net_queue);
+  rt_mutex_release(&fmu_net_queue_lock);
+}
+
 /*接收到串口的数据，并将数据转发到网络端*/
 void com_task(void) {
   static uint8_t buff[128];
@@ -86,11 +132,11 @@ void com_task(void) {
       while (1) {
         len = rt_device_read(fmu_com, 0, buff, sizeof(buff));
         if (len > 0) {
-          lte_diag_fmu_rx(len);
+          lte_diag_fmu_data(buff, len);
           if (lte_dev.client1->connect_sta == true &&
               lte_dev.data_tx_paused == false) {
             /* 仅在客户端2连接时转发 */
-            BSP_LTE_SendData(buff, len);
+            fmu_net_queue_put(buff, len);
           }
         } else {
           break;

applications/VK_Com.h

@@ -15,6 +15,9 @@ void com_task(void);
 rt_device_t fmu_com_get(void);
 
 int fmu_com_register(rt_device_t com_dev);
+rt_size_t fmu_net_queue_put(const uint8_t *data, rt_size_t length);
+rt_size_t fmu_net_queue_get(uint8_t *data, rt_size_t length);
+void fmu_net_queue_reset(void);
 
 #ifdef __cplusplus
 }

applications/drv_ec800k.c

@@ -38,6 +38,247 @@ CLte_dev_t lte_dev = {
 
 lte_diag_t lte_diag = {0};
 static bool lte_log_clock_query_done = false;
+static char socket_urc_line[80];
+static rt_size_t socket_urc_line_len = 0;
+static volatile bool socket_open_seen = false;
+static volatile int16_t socket_open_result = -1;
+
+typedef struct {
+  rt_uint16_t remaining;
+  rt_uint16_t checksum;
+  rt_uint16_t received_checksum;
+  rt_uint8_t magic;
+  rt_uint8_t phase;
+  rt_uint8_t position;
+  rt_uint8_t payload_length;
+  rt_uint8_t incompat_flags;
+  bool heartbeat;
+} mavlink_diag_parser_t;
+
+static mavlink_diag_parser_t fmu_mavlink_parser;
+static mavlink_diag_parser_t server_mavlink_parser;
+
+static int parse_decimal(const char **text) {
+  int value = 0;
+  bool found = false;
+  const char *p = *text;
+
+  while (*p == ' ') p++;
+  while (*p >= '0' && *p <= '9') {
+    found = true;
+    value = value * 10 + (*p++ - '0');
+  }
+  *text = p;
+  return found ? value : -1;
+}
+
+static void copy_csv_token(const char **text, char *output, rt_size_t capacity) {
+  const char *p = *text;
+  rt_size_t used = 0;
+  char terminator = ',';
+
+  if (capacity == 0) return;
+  while (*p == ' ' || *p == ',') p++;
+  if (*p == '"') {
+    terminator = '"';
+    p++;
+  }
+  while (*p != '\0' && *p != '\r' && *p != '\n' && *p != terminator) {
+    if (used + 1 < capacity) output[used++] = *p;
+    p++;
+  }
+  while (used > 0 && output[used - 1] == ' ') used--;
+  output[used] = '\0';
+  if (*p == terminator) p++;
+  *text = p;
+}
+
+static void mavlink_crc_accumulate(uint8_t data, rt_uint16_t *checksum) {
+  uint8_t tmp = data ^ (uint8_t)(*checksum & 0xff);
+  tmp ^= tmp << 4;
+  *checksum = (*checksum >> 8) ^ ((rt_uint16_t)tmp << 8) ^
+              ((rt_uint16_t)tmp << 3) ^ ((rt_uint16_t)tmp >> 4);
+}
+
+static void mavlink_diag_start(mavlink_diag_parser_t *parser, uint8_t magic) {
+  parser->magic = magic;
+  parser->phase = 1;
+  parser->position = 0;
+  parser->remaining = 0;
+  parser->checksum = 0xffff;
+  parser->received_checksum = 0;
+  parser->payload_length = 0;
+  parser->incompat_flags = 0;
+  parser->heartbeat = false;
+}
+
+static void mavlink_diag_feed(mavlink_diag_parser_t *parser,
+                              const uint8_t *data, rt_size_t size,
+                              rt_uint32_t *heartbeat_count) {
+  rt_size_t i;
+
+  for (i = 0; i < size; i++) {
+    uint8_t ch = data[i];
+
+    if (parser->phase == 0) {
+      if (ch == 0xFE || ch == 0xFD) {
+        mavlink_diag_start(parser, ch);
+      }
+      continue;
+    }
+
+    if (parser->phase == 5) {
+      parser->remaining--;
+      if (parser->remaining == 0) parser->phase = 0;
+      continue;
+    }
+
+    if (parser->phase == 2) {
+      mavlink_crc_accumulate(ch, &parser->checksum);
+      parser->remaining--;
+      if (parser->remaining == 0) parser->phase = 3;
+      continue;
+    }
+
+    if (parser->phase == 3) {
+      parser->received_checksum = ch;
+      parser->phase = 4;
+      continue;
+    }
+
+    if (parser->phase == 4) {
+      parser->received_checksum |= (rt_uint16_t)ch << 8;
+      mavlink_crc_accumulate(50, &parser->checksum);
+      if (parser->heartbeat &&
+          parser->checksum == parser->received_checksum) {
+        (*heartbeat_count)++;
+      }
+      if (parser->magic == 0xFD &&
+          (parser->incompat_flags & 0x01) != 0) {
+        parser->phase = 5;
+        parser->remaining = 13;
+      } else {
+        parser->phase = 0;
+      }
+      continue;
+    }
+
+    mavlink_crc_accumulate(ch, &parser->checksum);
+    if (parser->position == 0) parser->payload_length = ch;
+    if (parser->magic == 0xFE && parser->position == 4) {
+      parser->heartbeat = parser->payload_length == 9 && ch == 0;
+      parser->remaining = parser->payload_length;
+      parser->phase = parser->remaining > 0 ? 2 : 3;
+    } else if (parser->magic == 0xFD) {
+      if (parser->position == 1) parser->incompat_flags = ch;
+      if (parser->position == 6) parser->heartbeat = ch == 0;
+      if (parser->position == 7)
+        parser->heartbeat = parser->heartbeat && ch == 0;
+      if (parser->position == 8) {
+        parser->heartbeat = parser->payload_length == 9 &&
+                            parser->heartbeat && ch == 0;
+        parser->remaining = parser->payload_length;
+        parser->phase = parser->remaining > 0 ? 2 : 3;
+      }
+    }
+    parser->position++;
+  }
+}
+
+static void lte_process_urc_line(const char *line) {
+  const char *p;
+
+  if (rt_strstr(line, "+QIURC:") != RT_NULL) {
+    if (rt_strstr(line, "\"recv\"") != RT_NULL) {
+      lte_dev.socket_recv_pending = true;
+    } else if (rt_strstr(line, "\"closed\"") != RT_NULL) {
+      lte_dev.socket_closed_pending = true;
+    } else if (rt_strstr(line, "\"pdpdeact\"") != RT_NULL) {
+      lte_dev.socket_pdpdeact_pending = true;
+      lte_diag.pdpdeact_count++;
+    }
+  }
+
+  p = rt_strstr(line, "+QIOPEN:");
+  if (p != RT_NULL) {
+    int connect_id;
+    int error;
+    p += rt_strlen("+QIOPEN:");
+    connect_id = parse_decimal(&p);
+    if (*p == ',') p++;
+    error = parse_decimal(&p);
+    if (connect_id == lte_dev.client1->connect_ID && error >= 0) {
+      socket_open_result = (int16_t)error;
+      socket_open_seen = true;
+    }
+  }
+}
+
+static void lte_process_text(const uint8_t *data, rt_size_t length) {
+  rt_size_t i;
+
+  for (i = 0; i < length; i++) {
+    uint8_t ch = data[i];
+    if (ch == '\r') continue;
+    if (ch == '\n') {
+      if (socket_urc_line_len > 0) {
+        socket_urc_line[socket_urc_line_len] = '\0';
+        lte_process_urc_line(socket_urc_line);
+        socket_urc_line_len = 0;
+      }
+    } else if (ch >= 0x20 && ch <= 0x7e) {
+      if (socket_urc_line_len < sizeof(socket_urc_line) - 1) {
+        socket_urc_line[socket_urc_line_len++] = (char)ch;
+      } else {
+        socket_urc_line_len = 0;
+      }
+    }
+  }
+}
+
+static rt_ssize_t lte_read_available(uint8_t *buffer, rt_size_t capacity) {
+  rt_ssize_t length = rt_device_read(lte_dev.com_dev, 0, buffer, capacity);
+  if (length > 0) lte_diag_uart2_rx((rt_size_t)length);
+  return length;
+}
+
+static void lte_drain_socket_input(void) {
+  rt_ssize_t length;
+
+  do {
+    length = lte_read_available(lte_dev.at_buf, sizeof(lte_dev.at_buf));
+    if (length > 0) lte_process_text(lte_dev.at_buf, (rt_size_t)length);
+  } while (length > 0);
+  while (rt_sem_take(lte_dev.com_dev_rx_sem, 0) == RT_EOK) { }
+}
+
+static int lte_wait_text(const char *success, const char *failure,
+                         rt_tick_t timeout) {
+  rt_tick_t deadline = rt_tick_get() + timeout;
+  rt_size_t used = 0;
+
+  rt_memset(lte_dev.at_buf, 0, sizeof(lte_dev.at_buf));
+  while ((rt_int32_t)(rt_tick_get() - deadline) < 0) {
+    rt_ssize_t length;
+    rt_sem_take(lte_dev.com_dev_rx_sem, 50);
+    length = lte_read_available(lte_dev.at_buf + used,
+                                sizeof(lte_dev.at_buf) - 1 - used);
+    if (length <= 0) continue;
+    lte_process_text(lte_dev.at_buf + used, (rt_size_t)length);
+    used += (rt_size_t)length;
+    lte_dev.at_buf[used] = '\0';
+    if (lte_dev.socket_closed_pending) return 1;
+    if (success != RT_NULL && rt_strstr((char *)lte_dev.at_buf, success)) return 0;
+    if ((failure != RT_NULL && rt_strstr((char *)lte_dev.at_buf, failure)) ||
+        rt_strstr((char *)lte_dev.at_buf, DEFAULT_ERROR)) return 1;
+    if (used >= sizeof(lte_dev.at_buf) - 1) {
+      rt_memcpy(lte_dev.at_buf, lte_dev.at_buf + used - 32, 32);
+      used = 32;
+      lte_dev.at_buf[used] = '\0';
+    }
+  }
+  return -1;
+}
 
 void lte_diag_at_begin(const char *cmd) {
   rt_size_t i;
@@ -86,6 +327,21 @@ void lte_diag_fmu_rx(rt_size_t size) {
   lte_diag.last_fmu_rx_tick = rt_tick_get();
 }
 
+void lte_diag_fmu_data(const uint8_t *data, rt_size_t size) {
+  if (data == RT_NULL || size == 0) return;
+  lte_diag_fmu_rx(size);
+  mavlink_diag_feed(&fmu_mavlink_parser, data, size, &lte_diag.fmu_heartbeats);
+}
+
+void lte_diag_server_data(const uint8_t *data, rt_size_t size) {
+  if (data == RT_NULL || size == 0) return;
+  lte_diag.server_rx_bytes += size;
+  lte_diag.server_rx_read_events++;
+  lte_diag.last_server_rx_tick = rt_tick_get();
+  mavlink_diag_feed(&server_mavlink_parser, data, size,
+                    &lte_diag.server_heartbeats);
+}
+
 void lte_diag_fmu_tx(rt_size_t size) {
   lte_diag.fmu_tx_bytes += size;
   lte_diag.last_fmu_tx_tick = rt_tick_get();
@@ -101,6 +357,26 @@ void lte_diag_connect_attempt(void) {
 void lte_diag_connect_success(void) {
   lte_diag.connect_tick = rt_tick_get();
   lte_diag.last_server_rx_tick = lte_diag.connect_tick;
+  lte_diag.last_socket_ack_tick = 0;
+  lte_diag.socket_acked_bytes = 0;
+  lte_diag.socket_unacked_bytes = 0;
+  lte_diag.socket_prompt_timeouts = 0;
+  lte_diag.socket_read_errors = 0;
+  lte_diag.socket_ack_errors = 0;
+  lte_diag.tx_queue_high_water = 0;
+  lte_diag.conn_fmu_rx_base = lte_diag.fmu_rx_bytes;
+  lte_diag.conn_fmu_tx_base = lte_diag.fmu_tx_bytes;
+  lte_diag.conn_server_rx_base = lte_diag.server_rx_bytes;
+  lte_diag.conn_server_events_base = lte_diag.server_rx_read_events;
+  lte_diag.conn_socket_tx_base = lte_diag.socket_tx_bytes;
+  lte_diag.conn_send_ok_base = lte_diag.socket_send_ok;
+  lte_diag.conn_send_fail_base = lte_diag.socket_send_fail;
+  lte_diag.conn_ack_queries_base = lte_diag.socket_ack_queries;
+  lte_diag.conn_queue_drops_base = lte_diag.tx_queue_drops;
+  lte_diag.conn_fmu_heartbeat_base = lte_diag.fmu_heartbeats;
+  lte_diag.conn_server_heartbeat_base = lte_diag.server_heartbeats;
+  rt_memset(&fmu_mavlink_parser, 0, sizeof(fmu_mavlink_parser));
+  rt_memset(&server_mavlink_parser, 0, sizeof(server_mavlink_parser));
 }
 
 void lte_diag_module_reset(void) {
@@ -135,6 +411,180 @@ void BSP_LTE_SetDataTxPaused(bool paused) {
   }
 }
 
+void BSP_LTE_ClearSocketEvents(void) {
+  lte_dev.socket_recv_pending = false;
+  lte_dev.socket_closed_pending = false;
+  lte_dev.socket_pdpdeact_pending = false;
+  socket_open_seen = false;
+  socket_open_result = -1;
+  socket_urc_line_len = 0;
+}
+
+int16_t BSP_LTE_OpenSocket(const char *cmd, uint8_t connect_id) {
+  rt_tick_t deadline;
+
+  (void)connect_id;
+  lte_drain_socket_input();
+  socket_open_seen = false;
+  socket_open_result = -1;
+  lte_diag_at_begin(cmd);
+  LOG_I("%s", cmd);
+  BSP_LTE_SendData((uint8_t *)cmd, rt_strlen(cmd));
+  deadline = rt_tick_get() + LTE_CMD_WAIT_QIOPEN;
+  while ((rt_int32_t)(rt_tick_get() - deadline) < 0) {
+    rt_ssize_t length;
+    rt_sem_take(lte_dev.com_dev_rx_sem, 100);
+    length = lte_read_available(lte_dev.at_buf, sizeof(lte_dev.at_buf) - 1);
+    if (length > 0) {
+      lte_dev.at_buf[length] = '\0';
+      lte_process_text(lte_dev.at_buf, (rt_size_t)length);
+      if (rt_strstr((char *)lte_dev.at_buf, DEFAULT_ERROR)) {
+        lte_diag_at_end(1);
+        return 1;
+      }
+    }
+    if (socket_open_seen) {
+      LOG_I("[SOCKET] open result=%d", socket_open_result);
+      lte_diag_at_end(socket_open_result == 0 ? 0 : 1);
+      return socket_open_result == 0 ? 0 : 1;
+    }
+  }
+  lte_diag_at_end(-1);
+  return -1;
+}
+
+int16_t BSP_LTE_SendSocketData(uint8_t connect_id, const uint8_t *data,
+                               uint16_t length) {
+  char command[32];
+  int result;
+
+  if (data == RT_NULL || length == 0 || length > 1460) return -1;
+  lte_drain_socket_input();
+  rt_snprintf(command, sizeof(command), AT_QISEND, connect_id, length);
+  BSP_LTE_SendData((uint8_t *)command, rt_strlen(command));
+  result = lte_wait_text(TPOK, DEFAULT_ERROR, LTE_CMD_WAIT_PROMPT);
+  if (result != 0) {
+    if (result < 0) lte_diag.socket_prompt_timeouts++;
+    lte_diag.socket_send_fail++;
+    return result < 0 ? -1 : 1;
+  }
+
+  BSP_LTE_SendData((uint8_t *)data, length);
+  result = lte_wait_text(QI_SEND_OK, QI_SEND_FAIL, LTE_CMD_WAIT_SEND);
+  if (result == 0) {
+    lte_diag.socket_tx_bytes += length;
+    lte_diag.socket_send_ok++;
+    return 0;
+  }
+  lte_diag.socket_send_fail++;
+  return result < 0 ? -1 : 1;
+}
+
+int16_t BSP_LTE_QuerySocketSendStatus(uint8_t connect_id) {
+  char command[24];
+  const char *p;
+  int total;
+  int acked;
+  int unacked;
+
+  lte_drain_socket_input();
+  rt_snprintf(command, sizeof(command), AT_QISEND, connect_id, 0);
+  BSP_LTE_SendData((uint8_t *)command, rt_strlen(command));
+  if (lte_wait_text("\r\nOK\r\n", DEFAULT_ERROR, LTE_CMD_WAIT_SEND) != 0) {
+    lte_diag.socket_ack_errors++;
+    return -1;
+  }
+
+  p = rt_strstr((char *)lte_dev.at_buf, "+QISEND:");
+  if (p == RT_NULL) {
+    lte_diag.socket_ack_errors++;
+    return -1;
+  }
+  p += rt_strlen("+QISEND:");
+  total = parse_decimal(&p);
+  if (*p == ',') p++;
+  acked = parse_decimal(&p);
+  if (*p == ',') p++;
+  unacked = parse_decimal(&p);
+  if (total < 0 || acked < 0 || unacked < 0) {
+    lte_diag.socket_ack_errors++;
+    return -1;
+  }
+  (void)total;
+  lte_diag.socket_acked_bytes = (rt_uint32_t)acked;
+  lte_diag.socket_unacked_bytes = (rt_uint32_t)unacked;
+  lte_diag.socket_ack_queries++;
+  lte_diag.last_socket_ack_tick = rt_tick_get();
+  return 0;
+}
+
+int16_t BSP_LTE_ReadSocketData(uint8_t connect_id, uint8_t *data,
+                               uint16_t capacity) {
+  char command[32];
+  rt_tick_t deadline;
+  rt_size_t used = 0;
+
+  if (data == RT_NULL || capacity == 0 || capacity > LTE_SOCKET_RX_CHUNK_SIZE)
+    return -1;
+  lte_drain_socket_input();
+  lte_dev.socket_recv_pending = false;
+  rt_snprintf(command, sizeof(command), "AT+QIRD=%u,%u\r\n",
+              connect_id, capacity);
+  BSP_LTE_SendData((uint8_t *)command, rt_strlen(command));
+  rt_memset(lte_dev.at_buf, 0, sizeof(lte_dev.at_buf));
+  deadline = rt_tick_get() + LTE_CMD_WAIT_SEND;
+  while ((rt_int32_t)(rt_tick_get() - deadline) < 0) {
+    rt_ssize_t length;
+    char *header;
+    char *payload;
+    const char *number;
+    int payload_length;
+
+    rt_sem_take(lte_dev.com_dev_rx_sem, 50);
+    length = lte_read_available(lte_dev.at_buf + used,
+                                sizeof(lte_dev.at_buf) - 1 - used);
+    if (length <= 0) continue;
+    used += (rt_size_t)length;
+    lte_dev.at_buf[used] = '\0';
+    header = rt_strstr((char *)lte_dev.at_buf, "+QIRD:");
+    if (header == RT_NULL) {
+      if (rt_strstr((char *)lte_dev.at_buf, "\"closed\"") != RT_NULL) {
+        lte_dev.socket_closed_pending = true;
+        return -1;
+      }
+      continue;
+    }
+    number = header + rt_strlen("+QIRD:");
+    payload_length = parse_decimal(&number);
+    payload = rt_strstr((char *)number, "\r\n");
+    if (payload_length < 0 || payload == RT_NULL) continue;
+    payload += 2;
+    if ((rt_size_t)(payload - (char *)lte_dev.at_buf) + payload_length + 6 > used)
+      continue;
+    if (payload_length > capacity) {
+      lte_diag.socket_read_errors++;
+      return -1;
+    }
+    if (header > (char *)lte_dev.at_buf)
+      lte_process_text(lte_dev.at_buf, (rt_size_t)(header - (char *)lte_dev.at_buf));
+    if (payload_length > 0) rt_memcpy(data, payload, payload_length);
+    lte_process_text((uint8_t *)payload + payload_length, 6);
+    return (int16_t)payload_length;
+  }
+  lte_diag.socket_read_errors++;
+  return -1;
+}
+
+void BSP_LTE_PollSocketUrc(uint32_t waittime) {
+  rt_ssize_t length;
+
+  if (rt_sem_take(lte_dev.com_dev_rx_sem, waittime) != RT_EOK) return;
+  do {
+    length = lte_read_available(lte_dev.at_buf, sizeof(lte_dev.at_buf));
+    if (length > 0) lte_process_text(lte_dev.at_buf, (rt_size_t)length);
+  } while (length > 0);
+}
+
 void BSP_LTE_InitLogClock(void) {
   if (lte_log_clock_query_done) {
     return;
@@ -151,6 +601,104 @@ void BSP_LTE_InitLogClock(void) {
   }
 }
 
+static void parse_cereg_snapshot(const char *response) {
+  const char *p = rt_strstr(response, "+CEREG:");
+  int value;
+
+  if (p == RT_NULL) return;
+  p += rt_strlen("+CEREG:");
+  value = parse_decimal(&p);
+  if (value < 0 || *p != ',') return;
+  p++;
+  value = parse_decimal(&p);
+  if (value < 0) return;
+  lte_diag.network.cereg = (int8_t)value;
+  if (*p == ',') {
+    copy_csv_token(&p, lte_diag.network.tac,
+                   sizeof(lte_diag.network.tac));
+    copy_csv_token(&p, lte_diag.network.cell,
+                   sizeof(lte_diag.network.cell));
+  }
+}
+
+static void parse_cgatt_snapshot(const char *response) {
+  const char *p = rt_strstr(response, "+CGATT:");
+  int value;
+
+  if (p == RT_NULL) return;
+  p += rt_strlen("+CGATT:");
+  value = parse_decimal(&p);
+  if (value >= 0) lte_diag.network.cgatt = (int8_t)value;
+}
+
+static void parse_qiact_snapshot(const char *response) {
+  const char *p = rt_strstr(response, "+QIACT:");
+  int context;
+  int state;
+
+  if (p == RT_NULL) {
+    lte_diag.network.pdp = 0;
+    return;
+  }
+  p += rt_strlen("+QIACT:");
+  context = parse_decimal(&p);
+  if (context < 0 || *p != ',') return;
+  p++;
+  state = parse_decimal(&p);
+  if (context == 1 && state >= 0) lte_diag.network.pdp = (int8_t)state;
+}
+
+static void parse_qnwinfo_snapshot(const char *response) {
+  const char *p = rt_strstr(response, "+QNWINFO:");
+  char channel[12];
+
+  if (p == RT_NULL) return;
+  p += rt_strlen("+QNWINFO:");
+  copy_csv_token(&p, lte_diag.network.rat, sizeof(lte_diag.network.rat));
+  copy_csv_token(&p, lte_diag.network.oper, sizeof(lte_diag.network.oper));
+  copy_csv_token(&p, lte_diag.network.band, sizeof(lte_diag.network.band));
+  copy_csv_token(&p, channel, sizeof(channel));
+  p = channel;
+  {
+    int value = parse_decimal(&p);
+    if (value >= 0) lte_diag.network.channel = (rt_uint32_t)value;
+  }
+}
+
+void BSP_LTE_CollectNetworkSnapshot(void) {
+  lte_network_snapshot_t *network = &lte_diag.network;
+
+  rt_memset(network, 0, sizeof(*network));
+  network->cereg = -1;
+  network->cgatt = -1;
+  network->pdp = -1;
+  network->csq = -1;
+
+  BSP_LTE_SendCmd(AT_CEREG2, DEFAULT_EXPECT, DEFAULT_ERROR,
+                  LTE_CMD_WAIT_NORMAL);
+  if (BSP_LTE_SendCmd(AT_CEREG, DEFAULT_EXPECT, DEFAULT_ERROR,
+                      LTE_CMD_WAIT_NORMAL) == 0) {
+    parse_cereg_snapshot((const char *)lte_dev.at_buf);
+  }
+  BSP_LTE_SendCmd(AT_CEREG0, DEFAULT_EXPECT, DEFAULT_ERROR,
+                  LTE_CMD_WAIT_NORMAL);
+
+  if (BSP_LTE_SendCmd(AT_CGATT, DEFAULT_EXPECT, DEFAULT_ERROR,
+                      LTE_CMD_WAIT_NORMAL) == 0) {
+    parse_cgatt_snapshot((const char *)lte_dev.at_buf);
+  }
+  if (BSP_LTE_SendCmd(AT_QIACT, DEFAULT_EXPECT, DEFAULT_ERROR,
+                      LTE_CMD_WAIT_NORMAL) == 0) {
+    parse_qiact_snapshot((const char *)lte_dev.at_buf);
+  }
+  if (BSP_LTE_SendCmd(AT_QNWINFO, DEFAULT_EXPECT, DEFAULT_ERROR,
+                      LTE_CMD_WAIT_NORMAL) == 0) {
+    parse_qnwinfo_snapshot((const char *)lte_dev.at_buf);
+  }
+  network->csq = BSP_LTE_GetCSQ();
+  if (network->csq >= 0) lte_dev.csq = network->csq;
+}
+
 int16_t BSP_LTE_SendCmd(const char *cmd, const char *expect, const char *error,
                         uint32_t waittime) {
   lte_diag_at_begin(cmd);
@@ -167,6 +715,7 @@ int16_t BSP_LTE_SendCmd(const char *cmd, const char *expect, const char *error,
                                          sizeof(lte_dev.at_buf));
     if (read_len > 0) {
       lte_diag_uart2_rx((rt_size_t)read_len);
+      lte_process_text(lte_dev.at_buf, (rt_size_t)read_len);
     }
 
     LOG_I("%s\n", lte_dev.at_buf);

applications/drv_ec800k.h

@@ -66,7 +66,9 @@ extern "C" {
 #define AT_CGREG "AT+CGREG?\r\n"  // GPRS REG 2G
 #define AT_CEREG "AT+CEREG?\r\n"  // EPS REG 4G
 #define AT_CEREG0 "AT+CEREG=0\r\n"
+#define AT_CEREG2 "AT+CEREG=2\r\n"
 #define AT_CSQ "AT+CSQ\r\n"
+#define AT_QNWINFO "AT+QNWINFO\r\n"
 #define AT_CPSI "AT+CPSI?\r\n"
 #define AT_CIPMODE "AT+CIPMODE=1\r\n"
 
@@ -88,6 +90,7 @@ extern "C" {
 #define AT_TPCLOSE "+++\r\n"
 #define AT_CIPSEND "AT+CIPSEND=%d,%d\r\n"
 #define AT_QISEND "AT+QISEND=%d,%d\r\n"
+#define AT_QISDE0 "AT+QISDE=0\r\n"
 #define QI_SEND_OK "\r\nSEND OK\r\n"
 #define QI_SEND_FAIL "\r\nSEND FAIL\r\n"
 #define AT_CGMR "AT+CGMR\r\n"
@@ -98,6 +101,8 @@ extern "C" {
 
 #define AT_QIOPEN_TRANS \
   "AT+QIOPEN=1,%d,\"%s\",\"%s\",%s,0,2\r\n"  // transparent Mode
+#define AT_QIOPEN_BUFFER \
+  "AT+QIOPEN=1,%d,\"%s\",\"%s\",%s,0,0\r\n"  // buffer Mode
 #define AT_QIOPEN_FORW \
   "AT+QIOPEN=1,%d,\"%s\",\"%s\",%s,0,1\r\n"  // Immediate Forwarding Mode
 
@@ -199,6 +204,7 @@ extern "C" {
 //AT CFG
 #define AT_CFG_TRANS_SIZE "AT+QICFG=\"transpktsize\",512\r\n"
 #define AT_CFG_TRANS_WAITTM "AT+QICFG=\"transwaittm\",0\r\n"
+#define AT_CFG_RECV_IND "AT+QICFG=\"recvind\",1\r\n"
 #define AT_CFG_PASSIVE_CLOSED "AT+QICFG=\"passiveclosed\",1\r\n"
 #define AT_CFG_TCP_KEEPALIVE "AT+QICFG=\"tcp/keepalive\",1,30,25,3\r\n"
 
@@ -206,9 +212,12 @@ extern "C" {
 #define LTE_CMD_WAIT_QICLOSE (10000)
 #define LTE_CMD_WAIT_QIACT (150000)
 #define LTE_CMD_WAIT_QIDEACT (40000)
+#define LTE_CMD_WAIT_PROMPT (3000)
+#define LTE_CMD_WAIT_SEND (10000)
+#define LTE_SOCKET_RX_CHUNK_SIZE (128)
+#define LTE_SOCKET_TX_CHUNK_SIZE (256)
 
-/* Set after confirming the server MAVLink heartbeat period. 0 disables the
- * application-level silence recovery and leaves NO CARRIER/keepalive active. */
+/* Set after confirming the server MAVLink heartbeat period. */
 #define LTE_SERVER_SILENCE_TIMEOUT_SEC (15)
 
 typedef struct {
@@ -227,8 +236,23 @@ typedef enum {
   LTE_DISC_AT_TIMEOUT,
   LTE_DISC_QIOPEN_FAILED,
   LTE_DISC_MODULE_RESET,
+  LTE_DISC_SERVER_SILENCE,
+  LTE_DISC_SOCKET_SEND,
 } lte_disconnect_reason_t;
 
+typedef struct {
+  int8_t cereg;
+  int8_t cgatt;
+  int8_t pdp;
+  int8_t csq;
+  char rat[12];
+  char oper[16];
+  char band[16];
+  char tac[9];
+  char cell[12];
+  rt_uint32_t channel;
+} lte_network_snapshot_t;
+
 typedef struct {
   rt_uint32_t uart2_rx_bytes;
   rt_uint32_t uart2_tx_bytes;
@@ -250,17 +274,45 @@ typedef struct {
   rt_uint32_t server_rx_bytes;
   rt_uint32_t server_rx_read_events;
   rt_uint32_t server_silence_timeout_count;
+  rt_uint32_t socket_tx_bytes;
+  rt_uint32_t socket_send_ok;
+  rt_uint32_t socket_send_fail;
+  rt_uint32_t socket_prompt_timeouts;
+  rt_uint32_t socket_read_errors;
+  rt_uint32_t socket_acked_bytes;
+  rt_uint32_t socket_unacked_bytes;
+  rt_uint32_t socket_ack_queries;
+  rt_uint32_t socket_ack_errors;
+  rt_uint32_t tx_queue_drops;
+  rt_uint32_t tx_queue_high_water;
+  rt_uint32_t fmu_heartbeats;
+  rt_uint32_t server_heartbeats;
+  rt_uint32_t pdpdeact_count;
+  rt_uint32_t conn_fmu_rx_base;
+  rt_uint32_t conn_fmu_tx_base;
+  rt_uint32_t conn_server_rx_base;
+  rt_uint32_t conn_server_events_base;
+  rt_uint32_t conn_socket_tx_base;
+  rt_uint32_t conn_send_ok_base;
+  rt_uint32_t conn_send_fail_base;
+  rt_uint32_t conn_ack_queries_base;
+  rt_uint32_t conn_queue_drops_base;
+  rt_uint32_t conn_fmu_heartbeat_base;
+  rt_uint32_t conn_server_heartbeat_base;
   rt_tick_t last_uart2_rx_tick;
   rt_tick_t last_uart2_tx_tick;
   rt_tick_t last_fmu_rx_tick;
   rt_tick_t last_fmu_tx_tick;
   rt_tick_t last_server_rx_tick;
+  rt_tick_t last_socket_ack_tick;
   rt_tick_t connect_tick;
   rt_tick_t last_disconnect_tick;
   rt_tick_t last_at_elapsed;
   rt_int32_t last_at_result;
   char last_at_cmd[20];
   lte_disconnect_reason_t last_disconnect_reason;
+  lte_network_snapshot_t network;
+  bool disconnect_report_pending;
 } lte_diag_t;
 
 extern lte_diag_t lte_diag;
@@ -272,6 +324,8 @@ void lte_diag_uart2_tx(rt_size_t size);
 void lte_diag_uart_error(const char *name, rt_uint32_t error_code);
 void lte_diag_fmu_rx(rt_size_t size);
 void lte_diag_fmu_tx(rt_size_t size);
+void lte_diag_fmu_data(const uint8_t *data, rt_size_t size);
+void lte_diag_server_data(const uint8_t *data, rt_size_t size);
 void lte_diag_connect_attempt(void);
 void lte_diag_connect_success(void);
 void lte_diag_disconnect(lte_disconnect_reason_t reason);
@@ -299,6 +353,9 @@ typedef struct {
   bool reset_flag;
   bool dev_init_flag;
   volatile bool data_tx_paused;
+  volatile bool socket_recv_pending;
+  volatile bool socket_closed_pending;
+  volatile bool socket_pdpdeact_pending;
 } CLte_dev_t;
 extern CLte_dev_t lte_dev;
 
@@ -320,6 +377,15 @@ void BSP_LTE_SetDataTxPaused(bool paused);
 
 void BSP_LTE_Config(void);
 void BSP_LTE_InitLogClock(void);
+int16_t BSP_LTE_OpenSocket(const char *cmd, uint8_t connect_id);
+int16_t BSP_LTE_SendSocketData(uint8_t connect_id, const uint8_t *data,
+                               uint16_t length);
+int16_t BSP_LTE_ReadSocketData(uint8_t connect_id, uint8_t *data,
+                               uint16_t capacity);
+int16_t BSP_LTE_QuerySocketSendStatus(uint8_t connect_id);
+void BSP_LTE_PollSocketUrc(uint32_t waittime);
+void BSP_LTE_ClearSocketEvents(void);
+void BSP_LTE_CollectNetworkSnapshot(void);
 
 int BSP_LTE_GetICCID(char *pICCID);