/** ****************************************************************************** * @file iot_mqtt_srv.c * @author wangfq * @version V1.0 * @date 2026-07-03 * @brief IoT MQTT 客户端实现 — DLD960 IoT 协议 * * 连接流程: TCP connect → MQTT CONNECT → CONNACK → SUBSCRIBE → SUBACK → READY * 断线重连: 指数退避 5s~60s * 数据上报: loop_data / event_report / heartbeat ****************************************************************************** */ #include "CONFIG.h" #include "iot_mqtt_srv.h" #include "eth_driver.h" #include "wchnet.h" #include "net_srv.h" #include "MQTTPacket.h" #include "cmcng.h" #include "loop_uart_proto.h" #include "simple_json.h" #include "tcp_json_srv.h" #include "storage.h" #include "offlog.h" #include "snapshot.h" #include "fault_diag.h" #include "ch32v20x_iwdg.h" #include #include #include /*=========================================================================== * Global State *===========================================================================*/ extern ReportConfig g_report_cfg; // from tcp_json_srv.c extern uint8_t SocketId_TCP; // from net_srv.c, MQTT socket created by WCHNET_CreateTcpMqttSocket uint8_t g_iot_socket = 0xFF; // MQTT TCP socket ID IotMqttState g_iot_state = IOT_STATE_DISCONNECTED; static IotMqttState _prev_iot_state = IOT_STATE_DISCONNECTED; // 事件日志: 状态沿检测 uint8_t g_iot_msg_id = 0; // MQTT packet identifier static uint32_t _iot_last_heartbeat = 0; // 上次 PINGREQ 时刻 (ms), MQTT 保活 static uint32_t _iot_reconnect_deadline = 0; static uint32_t _iot_reconnect_backoff = 0; static uint32_t _iot_connect_start = 0; // TCP connect 开始时刻 /*=========================================================================== * 传感器数据缓存 & 上报间隔控制 *===========================================================================*/ #define IOT_MQTT_FAST_INTERVAL_MS 300 // 变化态快速上报间隔 (ms) #define IOT_MQTT_VARIATION_THRESHOLD 10 // diff 阈值: >= 此值进入快速上报 #define IOT_MQTT_IDLE_INTERVAL_MIN_MS 1000 // 空闲间隔最小 1s (防 interval=0 死锁) static LUP_SensorReport _cached_sr; // 最新传感器数据缓存 static uint8_t _cached_sr_valid; // 缓存有效标志 static uint32_t _last_publish_ms; // 上次上报时刻 (ms) /*=========================================================================== * 事件上报 event_report — 协议 V1.04: 平台必答 + 设备重发 * * 检测: car_state/loop_state 翻转沿 (每帧比对, 经 lup 回调 + Step1 双路汇聚) * 队列: 16 深环形队列, 溢出丢最旧; 事件仅在收到 ACK 后出队 * 重发: 5s 超时, 同 msg_id/原始 ts, 最多 3 次; 耗尽后挂起, * 待 MQTT 重连或新事件到达时以新 msg_id 合并重报 * 应答: 平台回 {cmd:"event_report", msg_id(回显), code}, 由 * manage_mqtt_recv_message (net_srv.c) 路由到 iot_evt_handle_ack() *===========================================================================*/ #define IOT_EVT_QUEUE_DEPTH 16 // 待发队列深度 (协议建议 >=16) #define IOT_EVT_MAX_PER_PKT 6 // 单包最多事件数 (6条约358B < 500B发布上限) #define IOT_EVT_ACK_TIMEOUT_MS 5000 // 确认超时 (协议 V1.04) #define IOT_EVT_MAX_RETRY 3 // 最大重发次数 (含首发共4次) enum { IOT_EVT_CAR_ENTER = 0, IOT_EVT_CAR_LEAVE, IOT_EVT_LOOP_CUT, IOT_EVT_LOOP_RESTORE }; typedef struct { uint8_t type; // IOT_EVT_xxx uint8_t ch; // 通道号 1-based uint32_t value; // car_leave=通过时间(50ms), loop_restore=断开时长(50ms) } IotEvent; static IotEvent _evt_queue[IOT_EVT_QUEUE_DEPTH]; // 环形队列 static uint8_t _evt_head, _evt_count; static uint8_t _evt_prev_car[LUP_COIL_COUNT]; // 上一帧 car_state static uint8_t _evt_prev_loop[LUP_COIL_COUNT]; // 上一帧 loop_state (1=断开) static uint32_t _evt_cut_ms[LUP_COIL_COUNT]; // 断开起始时刻 (mstick) static uint8_t _evt_prev_valid; // 首帧只建快照不出事件 static uint32_t _evt_msg_id; // event_report 独立 msg_id (uint32 递增) static uint32_t _evt_pend_id; // 待确认包 msg_id, 0=无 static uint32_t _evt_pend_ts; // 待确认包 ts (首发时刻, 重发不刷新) static uint8_t _evt_pend_n; // 待确认包内事件数 (= 队列头 N 条) static uint32_t _evt_sent_ms; // 本次发送时刻 (超时计时) static uint8_t _evt_retry; // 已重发次数 static uint8_t _evt_gaveup; // 重试耗尽挂起标志 (新事件/重连时解除) /* 入队: 满则丢最旧; 若丢掉的事件属于待确认包, 作废该包 (事件仍按新包重报) */ static void iot_evt_enqueue(uint8_t type, uint8_t ch, uint32_t value) { if (_evt_count >= IOT_EVT_QUEUE_DEPTH) { _evt_head = (_evt_head + 1) % IOT_EVT_QUEUE_DEPTH; _evt_count--; if (_evt_pend_id) { // 待确认包引用队列头, 头被丢弃则作废重来 _evt_pend_id = 0; if (_evt_pend_n) _evt_pend_n = 0; } PRINT("EVT: queue overflow, drop oldest\n"); } { IotEvent *e = &_evt_queue[(_evt_head + _evt_count) % IOT_EVT_QUEUE_DEPTH]; e->type = type; e->ch = ch; e->value = value; _evt_count++; /* 事件日志: 线圈事件 (主循环上下文) */ offlog_coil((uint8_t)type + 1, ch, value); /* sub: 1=进 2=出 3=断开 4=恢复 */ } _evt_gaveup = 0; // 新事件到达 → 解除挂起, 触发合并上报 PRINT("EVT: enqueue type=%d ch=%d val=%lu (cnt=%d)\n", type, ch, value, _evt_count); } /* 沿检测: 每收到一帧有效 0xC0 调用一次 (两条消费路径都要喂) */ static void iot_evt_feed(const LUP_SensorReport *sr) { uint8_t i; FAULT_MARKER(MK_EVT_FEED_IN); if (!_evt_prev_valid) { // 首帧: 只建快照 (上电已有车不算进入沿) for (i = 0; i < LUP_COIL_COUNT; i++) { _evt_prev_car[i] = (i < sr->coil_count) ? sr->coils[i].car_state : 0; _evt_prev_loop[i] = (i < sr->coil_count) ? sr->coils[i].loop_state : 0; } _evt_prev_valid = 1; FAULT_MARKER(MK_EVT_FEED_OUT); return; } for (i = 0; i < sr->coil_count && i < LUP_COIL_COUNT; i++) { const LUP_CoilSensor *cs = &sr->coils[i]; /* 线圈断开期间 car_state 不可信: 仅前后两帧线圈均正常才判进出车沿 */ if (!_evt_prev_loop[i] && !cs->loop_state) { if (!_evt_prev_car[i] && cs->car_state) { iot_evt_enqueue(IOT_EVT_CAR_ENTER, i + 1, 0); } else if (_evt_prev_car[i] && !cs->car_state) { /* 离开帧 misc_type=时间量 时携带通过时间 (50ms 单位) */ uint32_t v = (cs->misc_type == 0) ? cs->misc.passtime_ms : 0; iot_evt_enqueue(IOT_EVT_CAR_LEAVE, i + 1, v); } } /* 线圈断开/恢复沿 */ if (!_evt_prev_loop[i] && cs->loop_state) { _evt_cut_ms[i] = mstick(); iot_evt_enqueue(IOT_EVT_LOOP_CUT, i + 1, 0); } else if (_evt_prev_loop[i] && !cs->loop_state) { iot_evt_enqueue(IOT_EVT_LOOP_RESTORE, i + 1, (mstick() - _evt_cut_ms[i]) / 50); // 断开时长, 50ms 单位 } _evt_prev_car[i] = cs->car_state; _evt_prev_loop[i] = cs->loop_state; } FAULT_MARKER(MK_EVT_FEED_OUT); } /* 统一帧摄取: 事件沿检测 + 刷新 loop_data 缓存 (单一数据源) 两条消费路径 (uart_srv→lup回调 / Step1直读) 都必须走这里。 教训(2026-07-15): 此前回调只喂事件、缓存只在 Step1 更新, 而 Step1 赢得 帧竞争的概率实测 <2% → loop_data 发布 34s 前的陈旧快照(车走后 iscar 仍 true), 且陈旧 diff 锁死 fast_mode 300ms 刷屏。事件与快照必须同源! */ static void iot_sensor_ingest(const LUP_SensorReport *sr) { FAULT_MARKER(MK_INGEST_IN); iot_evt_feed(sr); // 事件沿检测 memcpy(&_cached_sr, sr, sizeof(LUP_SensorReport)); // 刷新 loop_data 快照 _cached_sr_valid = 1; snap_enqueue(sr); /* 快照入队: 中断安全, 主循环 snap_flush 落盘 */ FAULT_MARKER(MK_INGEST_OUT); } /* lup 传感回调: uart_srv 消费路径的帧从这里喂入 (lup_process_frame 已过校验) */ static void iot_evt_sensor_cb(const uint8_t *pkg, uint16_t len) { LUP_SensorReport sr; FAULT_MARKER(MK_EVT_CB_IN); memset(&sr, 0, sizeof(sr)); if (lup_parse_sensor_report(pkg, len, &sr) == 0) { iot_sensor_ingest(&sr); } FAULT_MARKER(MK_EVT_CB_OUT); } /* 序列化并发布队列头 n 条事件 (首发与重发共用: 同 id/ts 同内容) */ static void iot_evt_send(uint32_t id, uint32_t ts, uint8_t n) { static const char *evt_names[] = {"car_enter", "car_leave", "loop_cut", "loop_restore"}; static char payload[512]; // static: 避免 2KB 栈溢出 int w, rem = sizeof(payload); char *p = payload; uint8_t i; w = snprintf(p, rem, "{\"msg_id\":%lu,\"cmd\":\"event_report\",\"ts\":%lu," "\"data\":{\"events\":[", id, ts); if (w < 0 || w >= rem) return; p += w; rem -= w; for (i = 0; i < n; i++) { const IotEvent *e = &_evt_queue[(_evt_head + i) % IOT_EVT_QUEUE_DEPTH]; w = snprintf(p, rem, "%s{\"type\":\"%s\",\"ch\":%d,\"value\":%lu}", (i > 0) ? "," : "", evt_names[e->type & 0x03], e->ch, e->value); if (w < 0 || w >= rem) return; p += w; rem -= w; } snprintf(p, rem, "]}}"); mqtt_publish((char *)g_iot_topic.topic_pub, payload, 1); PRINT("EVT: publish msg_id=%lu n=%d retry=%d\n", id, n, _evt_retry); } /* 平台应答入口 — manage_mqtt_recv_message (net_srv.c) 收到 cmd=event_report 时调用 */ void iot_evt_handle_ack(uint32_t msg_id, int code) { if (_evt_pend_id == 0 || msg_id != _evt_pend_id) { PRINT("EVT: ack msg_id=%lu ignored (pend=%lu)\n", msg_id, _evt_pend_id); return; } if (code != 0) { // 平台处理失败 → 视同未确认, 等超时重发 PRINT("EVT: ack code=%d, keep pending\n", code); return; } /* 确认成功 → 弹出本包事件 */ _evt_head = (_evt_head + _evt_pend_n) % IOT_EVT_QUEUE_DEPTH; _evt_count -= _evt_pend_n; PRINT("EVT: ack ok, %d events dequeued (left=%d)\n", _evt_pend_n, _evt_count); _evt_pend_id = 0; _evt_pend_n = 0; _evt_retry = 0; } /* 事件发送状态机: 主循环每轮调用 (置于 READY 检查之前, 以感知重连沿) */ static void iot_evt_process(void) { static uint8_t _was_ready = 0; uint8_t ready = (g_iot_state == IOT_STATE_READY); uint32_t now = mstick(); if (ready && !_was_ready) { // 重连沿 _evt_gaveup = 0; if (_evt_pend_id) { /* 有未决包 → 用【原 msg_id/原 ts】立即重发 (协议 V1.04 §5.3-2: 跨重连也须保持同 msg_id, 否则平台 (sn,msg_id) 去重失效致重复入库) */ _evt_retry = 0; // 重连后重试计数归零, 不吃掉本次 iot_evt_send(_evt_pend_id, _evt_pend_ts, _evt_pend_n); _evt_sent_ms = now; _was_ready = ready; return; } } _was_ready = ready; if (!ready) return; if (_evt_pend_id) { // 有未决包 → 超时重发 if (now - _evt_sent_ms < IOT_EVT_ACK_TIMEOUT_MS) return; if (_evt_retry >= IOT_EVT_MAX_RETRY) { PRINT("EVT: retry exhausted msg_id=%lu, hold %d events\n", _evt_pend_id, _evt_count); offlog_evt_giveup(_evt_pend_id); // 事件日志: 重试耗尽 _evt_pend_id = 0; _evt_gaveup = 1; // 挂起: 新事件或重连时再触发 return; } _evt_retry++; offlog_evt_retry(_evt_pend_id, _evt_retry); // 事件日志: ACK 超时重发 iot_evt_send(_evt_pend_id, _evt_pend_ts, _evt_pend_n); // 同 id/ts 重发 _evt_sent_ms = now; return; } if (_evt_count == 0 || _evt_gaveup) return; /* 发新包: 队列头 N 条合并 */ _evt_pend_n = (_evt_count > IOT_EVT_MAX_PER_PKT) ? IOT_EVT_MAX_PER_PKT : _evt_count; _evt_pend_id = ++_evt_msg_id; _evt_pend_ts = dev_time_now(); // 首发时刻 Unix 时间(已校准), 重发保持不刷新 _evt_retry = 0; iot_evt_send(_evt_pend_id, _evt_pend_ts, _evt_pend_n); _evt_sent_ms = now; } /*=========================================================================== * Buffers *===========================================================================*/ static uint8_t _iot_recv_buf[IOT_MQTT_RECV_BUF_LEN]; static uint16_t _iot_recv_len = 0; static uint8_t _iot_send_buf[IOT_MQTT_SEND_BUF_LEN]; static uint8_t _iot_wchnet_buf[RECE_BUF_LEN]; // WCHNET internal recv buffer /*=========================================================================== * Topic 构建 *===========================================================================*/ static char g_iot_dev_serial[13]; // 设备序列码 (12 hex chars) /* 构建 topic: dld960/{sn}/... */ static int iot_make_topic(char *out, uint16_t out_len, const char *direction, const char *category, const char *sub) { if (sub) { return snprintf(out, out_len, "dld960/%s/%s/%s/%s", g_iot_dev_serial, direction, category, sub); } return snprintf(out, out_len, "dld960/%s/%s/%s", g_iot_dev_serial, direction, category); } /*=========================================================================== * MQTT Packet Helpers *===========================================================================*/ /* 发送 MQTT 报文到 broker — 循环重试防 WCHNET 部分发送 (2026-07-23: SocketSend 只发 520/607B → 残留拼到下行 → broker 见垃圾 → _raw+RST) 连续失败追踪: ret=0x11 表示 TCP 发送队列满/连接断开, 3次连续失败 → 主动断连重连 (TCP超时要等~2分钟, 太慢了, 导致长时间丢数据) */ static int _iot_send_fail_cnt = 0; // 连续发送失败计数 static int iot_mqtt_send(const uint8_t *buf, uint16_t len) { uint16_t total_sent = 0; int retries = 0; while (total_sent < len) { uint32_t slen = len - total_sent; uint8_t ret = WCHNET_SocketSend(g_iot_socket, (uint8_t *)(buf + total_sent), &slen); total_sent += (uint16_t)slen; if (slen == 0 || ret != WCHNET_ERR_SUCCESS || ++retries > 10) { _iot_send_fail_cnt++; PRINT("IOT: SocketSend FAIL#%d ret=0x%02X sent=%u/%u\n", _iot_send_fail_cnt, ret, total_sent, len); if (_iot_send_fail_cnt >= 3) { PRINT("IOT: SocketSend 3 consecutive failures, forcing reconnect\n"); WCHNET_SocketClose(g_iot_socket, TCP_CLOSE_NORMAL); g_iot_socket = 0xFF; g_iot_state = IOT_STATE_DISCONNECTED; _iot_send_fail_cnt = 0; _iot_reconnect_deadline = mstick() + 3000; // 3s 后重连, 让 WCHNET 清旧 socket } return -1; } } _iot_send_fail_cnt = 0; // 成功一次就清零 return 0; } /* 发送 MQTT CONNECT — 参考 net_srv.c mqtt_connect 实现 */ static int iot_mqtt_send_connect(void) { static MQTTPacket_connectData opts; // static: 避免栈开销 static uint8_t buf[256]; int len; // 手动初始化（参考 net_srv.c 模式，不依赖 brace-initializer 赋值） memset(&opts, 0, sizeof(opts)); opts.struct_id[0] = 'M'; opts.struct_id[1] = 'Q'; opts.struct_id[2] = 'T'; opts.struct_id[3] = 'C'; opts.MQTTVersion = 4; opts.keepAliveInterval = IOT_MQTT_KEEPALIVE_SEC; opts.cleansession = 1; // clientID — 参考 net_srv.c 直接使用 g_dev_number_str opts.clientID.cstring = g_dev_number_str; // username / password — 参考 net_srv.c 直接赋值 opts.username.cstring = (char *)iot_net_info.username; opts.password.cstring = (char *)iot_net_info.password; len = MQTTSerialize_connect(buf, sizeof(buf), &opts); if (len <= 0) { PRINT("IOT: MQTTSerialize_connect failed\n"); return -1; } PRINT("IOT: → CONNECT clientId=%s keepAlive=%d\n", opts.clientID.cstring, opts.keepAliveInterval); return iot_mqtt_send(buf, (uint16_t)len); } /* 发送 MQTT SUBSCRIBE — V1.01 双主题协议 */ static int iot_mqtt_send_subscribe(void) { static uint8_t buf[256]; // static: 避免栈溢出 int len; char topic[IOT_MQTT_TOPIC_MAX_LEN]; MQTTString topics[1]; int qos[1] = {1}; int count = 0; // V1.01: 仅订阅 dld960/{sn}/srv 双主题 snprintf(topic, sizeof(topic), "dld960/%s/srv", g_iot_dev_serial); topics[count].cstring = topic; topics[count].lenstring.len = 0; count++; len = MQTTSerialize_subscribe(buf, sizeof(buf), 0, ++g_iot_msg_id, count, topics, qos); if (len <= 0) { PRINT("IOT: MQTTSerialize_subscribe failed\n"); return -1; } PRINT("IOT: → SUBSCRIBE pktId=%d topics=%d\n", g_iot_msg_id, count); return iot_mqtt_send(buf, (uint16_t)len); } /* 发送 MQTT PUBLISH */ static int iot_mqtt_publish(const char *topic, const char *payload, uint16_t payload_len, uint8_t qos) { static uint8_t buf[IOT_MQTT_SEND_BUF_LEN]; // static: 避免 2KB 栈溢出 int len; MQTTString mqtt_topic = MQTTString_initializer; mqtt_topic.cstring = (char *)topic; len = MQTTSerialize_publish(buf, sizeof(buf), 0, qos, 0, ++g_iot_msg_id, mqtt_topic, (unsigned char *)payload, payload_len); if (len <= 0) { PRINT("IOT: MQTTSerialize_publish failed\n"); return -1; } return iot_mqtt_send(buf, (uint16_t)len); } /*=========================================================================== * MQTT 接收处理 *===========================================================================*/ /* 处理一条收到的 MQTT PUBLISH 消息 */ static void iot_handle_publish(const char *topic, uint8_t *payload, int payload_len) { static char json[IOT_MQTT_RECV_BUF_LEN]; // static: 避免 1KB 栈开销 int copy_len = payload_len < (int)sizeof(json) - 1 ? payload_len : (int)sizeof(json) - 1; memcpy(json, payload, copy_len); json[copy_len] = '\0'; PRINT("IOT: PUBLISH topic=%s payload=%s\n", topic, json); /* 提取 msg_id 和 cmd */ char tmp[256]; uint32_t msg_id = 0; // 简单提取: 解析 JSON 中的 msg_id 和 cmd memset(tmp, 0, sizeof(tmp)); simple_parse_json(json, "\"msg_id\"", tmp); if (strlen(tmp) > 0) msg_id = (uint32_t)strtoul(tmp, NULL, 10); memset(tmp, 0, sizeof(tmp)); simple_parse_json(json, "\"cmd\"", tmp); // strip quotes char *cmd_str = tmp; if (cmd_str[0] == '"') cmd_str++; int cmd_len = strlen(cmd_str); if (cmd_len > 0 && cmd_str[cmd_len - 1] == '"') cmd_str[cmd_len - 1] = '\0'; if (strlen(cmd_str) == 0) { PRINT("IOT: no cmd in PUBLISH\n"); return; } /* 构建响应 topic — V1.01 双主题 */ char resp_topic[IOT_MQTT_TOPIC_MAX_LEN]; snprintf(resp_topic, sizeof(resp_topic), "dld960/%s/dev", g_iot_dev_serial); /* 处理命令 — 复用 TCP JSON 的命令逻辑 */ /* 目前仅实现基本响应框架, 后续逐步对接 Loop MCU 命令 */ if (strcmp(cmd_str, "dev_info_query") == 0) { char data_json[512]; snprintf(data_json, sizeof(data_json), "{\"msg_id\":%lu,\"cmd\":\"dev_info_query\"," "\"ts\":%lu,\"code\":0,\"msg\":\"success\"," "\"data\":{" "\"dev_serial\":\"%s\",\"hard_ver\":\"%s\",\"soft_ver\":\"%s\"," "\"model\":\"%s\",\"product_code\":\"960001\"," "\"sub_code\":{\"net\":%s,\"iot\":%s}," "\"bus\":{\"bus1\":0,\"bus2\":0,\"bus3\":0,\"bus4\":0}}}", msg_id, dev_time_now(), g_dev_number_str, HARDWARE_VER, FIRMWARE_VER, PRODUCT_MODEL, g_sub_code_enable.net_enable ? "true" : "false", g_sub_code_enable.iot_enable ? "true" : "false"); iot_mqtt_publish(resp_topic, data_json, strlen(data_json), 1); } else if (strcmp(cmd_str, "report_config") == 0) { /* 平台下发配置 → 更新 g_report_cfg, 回 ACK */ char data[512] = {0}; simple_parse_json(json, "\"data\"", data); if (strlen(data) > 0) { char tmp2[64]; memset(tmp2, 0, sizeof(tmp2)); simple_parse_json(data, "\"enable\"", tmp2); if (strlen(tmp2) > 0) g_report_cfg.enable = (strcmp(tmp2, "true") == 0); memset(tmp2, 0, sizeof(tmp2)); simple_parse_json(data, "\"interval\"", tmp2); if (strlen(tmp2) > 0) g_report_cfg.interval = (uint16_t)strtoul(tmp2, NULL, 10); memset(tmp2, 0, sizeof(tmp2)); simple_parse_json(data, "\"once\"", tmp2); if (strlen(tmp2) > 0) g_report_cfg.once = (strcmp(tmp2, "true") == 0); memset(tmp2, 0, sizeof(tmp2)); simple_parse_json(data, "\"env_eval\"", tmp2); if (strlen(tmp2) > 0) g_report_cfg.env_eval = (strcmp(tmp2, "true") == 0); memset(tmp2, 0, sizeof(tmp2)); simple_parse_json(data, "\"sensor_type\"", tmp2); if (strlen(tmp2) > 0) g_report_cfg.sensor_type = (uint8_t)strtoul(tmp2, NULL, 10); } char resp[256]; snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"report_config\"," "\"ts\":%lu,\"code\":0,\"msg\":\"success\"}", msg_id, dev_time_now()); iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); } else if (strcmp(cmd_str, "event_report") == 0) { /* 平台对 event_report 的 ACK: 检查 code 字段 */ char tmp3[64] = {0}; int code = -1; simple_parse_json(json, "\"code\"", tmp3); if (strlen(tmp3) > 0) code = (int)strtol(tmp3, NULL, 10); if (code == 0) { iot_evt_handle_ack(msg_id, 0); } else { iot_evt_handle_ack(msg_id, code); } // ACK 不回复 (避免乒乓) } else if (strcmp(cmd_str, "pwd_verify") == 0) { // 验证密码 char password[16] = {0}; char *data = (char *)malloc(512); if (data) { memset(data, 0, 512); simple_parse_json(json, "\"data\"", data); if (strlen(data) > 0) { memset(tmp, 0, sizeof(tmp)); simple_parse_json(data, "\"password\"", tmp); // strip quotes char *pwd = tmp; if (pwd[0] == '"') pwd++; int plen = strlen(pwd); if (plen > 0 && pwd[plen - 1] == '"') pwd[plen - 1] = '\0'; strncpy(password, pwd, 15); } free(data); } if (strlen(password) == 6 && memcmp(password, g_dev_password, 6) == 0) { char resp[256]; snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"pwd_verify\"," "\"ts\":%lu,\"code\":0,\"msg\":\"success\"}", msg_id, dev_time_now()); iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); PRINT("IOT: Auth success via MQTT\n"); } else { char resp[256]; snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"pwd_verify\"," "\"ts\":%lu,\"code\":2,\"msg\":\"password incorrect\"}", msg_id, dev_time_now()); iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); } } else if (strcmp(cmd_str, "log_stat") == 0) { /* 日志统计/分页定位: event/snapshot 流 (协议 V1.07) */ char stream_buf[16]; memset(stream_buf, 0, sizeof(stream_buf)); simple_parse_json(json, "\"stream\"", stream_buf); char resp[300]; if (strcmp(stream_buf, "snapshot") == 0) { uint32_t total = snap_count(); uint32_t seq_last = snap_seq_last(); uint32_t seq_first = (total > 0) ? (seq_last - total + 1) : 0; snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"log_stat\"," "\"ts\":%lu,\"code\":0,\"msg\":\"success\"," "\"data\":{\"stream\":\"snapshot\",\"enabled\":%s,\"boot_seq\":%lu," "\"count\":%lu,\"capacity\":%lu,\"seq_first\":%lu,\"seq_last\":%lu}}", msg_id, dev_time_now(), snap_enabled() ? "true" : "false", (unsigned long)snap_boot_seq(), (unsigned long)total, (unsigned long)SNAP_MAX_RECORDS, (unsigned long)seq_first, (unsigned long)seq_last); PRINT("IOT: log_stat(snapshot) count=%lu seq_first=%lu seq_last=%lu\n", (unsigned long)total, (unsigned long)seq_first, (unsigned long)seq_last); } else { uint32_t total = offlog_count(); uint32_t seq_last = offlog_seq_last(); uint32_t seq_first = (total > 0) ? (seq_last - total + 1) : 0; snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"log_stat\"," "\"ts\":%lu,\"code\":0,\"msg\":\"success\"," "\"data\":{\"stream\":\"event\",\"enabled\":%s,\"boot_seq\":%lu," "\"count\":%lu,\"capacity\":%lu,\"seq_first\":%lu,\"seq_last\":%lu}}", msg_id, dev_time_now(), offlog_enabled() ? "true" : "false", (unsigned long)offlog_boot_seq(), (unsigned long)total, (unsigned long)OFFLOG_MAX_RECORDS, (unsigned long)seq_first, (unsigned long)seq_last); PRINT("IOT: log_stat count=%lu seq_first=%lu seq_last=%lu\n", (unsigned long)total, (unsigned long)seq_first, (unsigned long)seq_last); } iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); } else if (strcmp(cmd_str, "log_query") == 0) { /* 分页拉取脱机日志: 按全局序号, event/snapshot 流 (协议 V1.07) */ static char resp[IOT_MQTT_SEND_BUF_LEN]; /* static: 避免大栈开销 */ char stream_buf[16]; uint32_t start_seq = 0, req_count = 0; int is_snap = 0; memset(tmp, 0, sizeof(tmp)); simple_parse_json(json, "\"start_seq\"", tmp); if (strlen(tmp) > 0) start_seq = (uint32_t)strtoul(tmp, NULL, 10); memset(tmp, 0, sizeof(tmp)); simple_parse_json(json, "\"count\"", tmp); if (strlen(tmp) > 0) req_count = (uint32_t)strtoul(tmp, NULL, 10); memset(stream_buf, 0, sizeof(stream_buf)); simple_parse_json(json, "\"stream\"", stream_buf); if (strcmp(stream_buf, "snapshot") == 0) is_snap = 1; int pos = snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"log_query\",\"ts\":%lu,\"code\":0," "\"msg\":\"success\",\"data\":{\"start_seq\":%lu,\"records\":[", msg_id, dev_time_now(), (unsigned long)start_seq); uint32_t fetched = 0; if (is_snap) { uint32_t total = snap_count(); uint32_t seq_last = snap_seq_last(); uint32_t seq_first = (total > 0) ? (seq_last - total + 1) : 0; if (req_count > SNAP_MAX_QUERY_RECORDS) req_count = SNAP_MAX_QUERY_RECORDS; if (req_count == 0) req_count = SNAP_MAX_QUERY_RECORDS; if (snap_enabled() && total > 0 && start_seq >= seq_first && start_seq <= seq_last) { uint32_t idx = start_seq - seq_first; /* 逻辑索引 = 全局序号 - seq_first */ while (fetched < req_count && (idx + fetched) < total) { SnapRec rec; if (snap_read_idx(idx + fetched, &rec) != 0) break; if (fetched > 0) pos += snprintf(resp + pos, sizeof(resp) - pos, ","); pos += snap_rec_to_json(&rec, resp + pos, sizeof(resp) - pos); fetched++; } } PRINT("IOT: log_query(snapshot) start_seq=%lu req=%lu fetched=%lu\n", (unsigned long)start_seq, (unsigned long)req_count, (unsigned long)fetched); } else { uint32_t total = offlog_count(); uint32_t seq_last = offlog_seq_last(); uint32_t seq_first = (total > 0) ? (seq_last - total + 1) : 0; if (req_count > OFFLOG_MAX_QUERY_RECORDS) req_count = OFFLOG_MAX_QUERY_RECORDS; if (req_count == 0) req_count = OFFLOG_MAX_QUERY_RECORDS; if (total > 0 && start_seq >= seq_first && start_seq <= seq_last) { uint32_t idx = start_seq - seq_first; /* 逻辑索引 = 全局序号 - seq_first */ while (fetched < req_count && (idx + fetched) < total) { OfflogEvt evt; if (offlog_read_idx((uint16_t)(idx + fetched), &evt) != 0) break; if (fetched > 0) pos += snprintf(resp + pos, sizeof(resp) - pos, ","); pos += offlog_evt_to_json(&evt, resp + pos, sizeof(resp) - pos); fetched++; } } PRINT("IOT: log_query start_seq=%lu req=%lu fetched=%lu\n", (unsigned long)start_seq, (unsigned long)req_count, (unsigned long)fetched); } snprintf(resp + pos, sizeof(resp) - pos, "]}}"); iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); } else if (strcmp(cmd_str, "log_clear") == 0) { /* 清除日志 (审计留痕). event 阻塞 ~2.8s (63 扇区), snapshot 阻塞 ~45ms (逻辑清除+当前扇区) */ char stream_buf[16]; memset(stream_buf, 0, sizeof(stream_buf)); simple_parse_json(json, "\"stream\"", stream_buf); char resp[256]; if (strcmp(stream_buf, "snapshot") == 0) { snap_clear(); PRINT("IOT: log_clear(snapshot) done\n"); } else { offlog_clear(); PRINT("IOT: log_clear done\n"); } snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"log_clear\"," "\"ts\":%lu,\"code\":0,\"msg\":\"success\"}", msg_id, dev_time_now()); iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); } else { // 暂不支持的命令, 返回错误 char resp[256]; snprintf(resp, sizeof(resp), "{\"msg_id\":%lu,\"cmd\":\"%s\"," "\"ts\":%lu,\"code\":4,\"msg\":\"unsupported command\"}", msg_id, cmd_str, dev_time_now()); iot_mqtt_publish(resp_topic, resp, strlen(resp), 1); } } /* 发送 initialize 上线消息 (IoT 路径) */ static void iot_send_initialize(void) { char payload[512]; char topic[IOT_MQTT_TOPIC_MAX_LEN]; snprintf(payload, sizeof(payload), "{\"msg_id\":%lu,\"cmd\":\"initialize\",\"ts\":%lu," "\"data\":{\"dev_serial\":\"%s\",\"model\":\"%s\"," "\"hard_ver\":\"%s\",\"soft_ver\":\"%s\"," "\"extra_info\":{\"code\":\"0\",\"csq\":\"0\",\"location\":\"\"}}}", (unsigned long)(g_iot_msg_id + 1), dev_time_now(), g_iot_dev_serial, PRODUCT_MODEL, HARDWARE_VER, FIRMWARE_VER); snprintf(topic, sizeof(topic), "dld960/%s/dev", g_iot_dev_serial); iot_mqtt_publish(topic, payload, strlen(payload), 0); } /* 处理 MQTT SUBACK */ static void iot_handle_suback(void) { PRINT("IOT: ← SUBACK, topics subscribed\n"); g_iot_state = IOT_STATE_READY; _iot_reconnect_backoff = 0; // 连接成功, 重置退避 // V1.03: 订阅成功后发布 initialize 告知服务器上线 (IoT 路径) iot_send_initialize(); } /* 处理收到的 MQTT 数据 */ static void iot_process_recv(void) { uint8_t header; int qos, payload_len; unsigned char retained; unsigned short packet_id; MQTTString topic; unsigned char *payload_ptr; while (_iot_recv_len >= 2) { header = _iot_recv_buf[0]; int msg_type = (header >> 4) & 0x0F; /* 先尝试解析整个 MQTT 包 */ int mqtt_pkt_len = 0; int multiplier = 1; int rem_len = 0; int i = 1; while (i < (int)_iot_recv_len && i < 5) { rem_len += (_iot_recv_buf[i] & 0x7F) * multiplier; multiplier *= 128; if ((_iot_recv_buf[i] & 0x80) == 0) { mqtt_pkt_len = 1 + (i - 1 + 1) + rem_len; // header + rem_len_bytes + payload break; } i++; } if (mqtt_pkt_len == 0 || mqtt_pkt_len > (int)_iot_recv_len) { return; // 包不完整, 等更多数据 } PRINT("IOT: ← MQTT packet type=%d len=%d\n", msg_type, mqtt_pkt_len); switch (msg_type) { case CONNACK: { unsigned char session_present, connack_rc; if (MQTTDeserialize_connack(&session_present, &connack_rc, _iot_recv_buf, mqtt_pkt_len) == 1) { PRINT("IOT: ← CONNACK rc=%d\n", connack_rc); if (connack_rc == 0) { // 连接成功 → 订阅 g_iot_state = IOT_STATE_MQTT_CONNECTED; iot_mqtt_send_subscribe(); } else { PRINT("IOT: CONNACK rejected, rc=%d\n", connack_rc); offlog_iot_disconnect(3); // 事件日志: broker 拒绝 g_iot_state = IOT_STATE_DISCONNECTED; } } break; } case SUBACK: iot_handle_suback(); break; case PUBLISH: { unsigned char pub_dup; if (MQTTDeserialize_publish(&pub_dup, &qos, &retained, &packet_id, &topic, &payload_ptr, &payload_len, _iot_recv_buf, mqtt_pkt_len) == 1) { char topic_str[IOT_MQTT_TOPIC_MAX_LEN]; memcpy(topic_str, topic.cstring ? topic.cstring : "", topic.lenstring.len < (int)sizeof(topic_str) - 1 ? topic.lenstring.len : (int)sizeof(topic_str) - 1); topic_str[topic.lenstring.len] = '\0'; iot_handle_publish(topic_str, payload_ptr, payload_len); // 如果 QoS > 0, 发送 PUBACK if (qos > 0) { uint8_t ack_buf[4]; int ack_len = MQTTSerialize_ack(ack_buf, sizeof(ack_buf), PUBACK, 0, packet_id); iot_mqtt_send(ack_buf, (uint16_t)ack_len); } } break; } case PINGRESP: PRINT("IOT: ← PINGRESP\n"); break; default: break; } /* 移除已处理的包 */ memmove(_iot_recv_buf, _iot_recv_buf + mqtt_pkt_len, _iot_recv_len - mqtt_pkt_len); _iot_recv_len -= mqtt_pkt_len; } } /*=========================================================================== * 传感器数据上报 (三档调度) * 立即档: car_state 翻转沿 → 直通门控立即上报 (进/出车不等间隔) * 快速档: |variation| > 阈值 → 300ms * 空闲档: 按配置 interval (默认 60s, 最小 1s) * * Step 1 — 消费 Loop MCU 新帧 → 事件沿检测 + 更新缓存 * Step 2 — 判定上报档位 (car_edge / fast_mode / idle) * Step 3 — 间隔门控 (car_edge 直通) *===========================================================================*/ void iot_mqtt_publish_sensor(void) { static uint8_t _last_car_state[4] = {0}; /*--- Step 1: 消费 0xC0 帧 (Step1 直读路径, 竞争窗口小, 少数帧走此路) ---*/ /* 注意: 置于 READY/enable 检查之前 —— 断网/未使能期间事件照样入队, 重连后由 iot_evt_process() 补报 (协议 V1.04)。 多数帧由 uart_srv→lup 回调路径摄取, 两路都汇入 iot_sensor_ingest */ if (g_pkg_uart_2.flag != 0 && g_pkg_uart_2.pkg[0] == 0x7F && g_pkg_uart_2.pkg[3] == 0xC0) { LUP_SensorReport sr; int ret = -100; memset(&sr, 0, sizeof(sr)); /* 直读路径未经过 lup_process_frame, 须自行校验 checksum */ if (lup_verify_checksum(g_pkg_uart_2.pkg, g_pkg_uart_2.offset) == 0) { ret = lup_parse_sensor_report(g_pkg_uart_2.pkg, g_pkg_uart_2.offset, &sr); } InitPkgUart(&g_pkg_uart_2); // 读完即清, 不持有 if (ret == 0) { iot_sensor_ingest(&sr); // 统一摄取: 事件沿 + loop_data 缓存 } else { PRINT("IOT: sensor frame invalid (%d)\n", ret); } } /*--- 事件上报状态机: 发送/重发/重连补报 ---*/ iot_evt_process(); if (g_iot_state != IOT_STATE_READY) return; if (!g_report_cfg.enable) return; /* 尚无缓存数据 → 不发 */ if (!_cached_sr_valid) return; /*--- Step 2: 判定上报档位 (三档) --- car_edge : 任一通道 car_state 翻转沿 → 【立即上报】直通间隔门控 fast_mode : 任一通道 |variation|>阈值 → 300ms 快速档 否则 : 空闲档, 按配置 interval (默认 60s, 最小 1s) */ uint32_t interval_ms; uint8_t fast_mode = 0; uint8_t car_edge = 0; { uint8_t i; for (i = 0; i < _cached_sr.coil_count; i++) { /* car_state 翻转沿(进车/出车)优先级最高, 命中即定档 */ if (_last_car_state[i] != _cached_sr.coils[i].car_state) { car_edge = 1; break; } // variation 为有符号(V1.05): 正=车/裕量, 负=反向漂移, 两向显著变化都加速 int32_t v = _cached_sr.coils[i].variation; int32_t av = (v >= 0) ? v : -v; if (av > IOT_MQTT_VARIATION_THRESHOLD) { fast_mode = 1; /* 记录但不 break: 后续通道可能有沿(优先级更高) */ } } } if (fast_mode || car_edge) { interval_ms = IOT_MQTT_FAST_INTERVAL_MS; // 300ms (car_edge 时门控被直通, 仅作记录) } else { /* 空闲态: 使用配置的 interval (秒→毫秒), 最小 1s */ uint32_t cfg_ms = (uint32_t)g_report_cfg.interval * 1000; interval_ms = (cfg_ms >= IOT_MQTT_IDLE_INTERVAL_MIN_MS) ? cfg_ms : IOT_MQTT_IDLE_INTERVAL_MIN_MS; } /*--- Step 3: 间隔门控 (car_edge 直通: 进/出车立即上报, 不等间隔) --- 防洪泛天然有界: Loop MCU 事件帧最快 150ms 一帧, 且发布后快照即同步, 同一个沿不会重复触发立即档 */ { uint32_t now = mstick(); if (!car_edge && _last_publish_ms != 0 && (now - _last_publish_ms) < interval_ms) { return; // 未到间隔; _last_car_state 不刷新, 翻转沿保持"待发" } _last_publish_ms = now; } /* 确定发布 → 刷新 car_state 快照。必须放在门控之后: 若放门控前, 沿被门控吞掉时快照已刷新, 下一轮检测不到翻转, 事件退化为空闲间隔上报, 快速上报失效 */ { uint8_t i; for (i = 0; i < _cached_sr.coil_count; i++) { _last_car_state[i] = _cached_sr.coils[i].car_state; } } /*--- Step 4: 构建 JSON → 发布 (字段与 V1.02 协议一致) --- 直接构建到 payload, 省掉 data_json[1024]: - 用 iot_mqtt_publish() 代替 mqtt_publish(), 发送缓冲隔离 (event_report→mqttBuf vs loop_data→iot_mqtt_publish::buf[1024]) - coil_count 边界硬限, 防 0xC0 坏帧致溢出 */ static char payload[800]; /* 2026-08-17: 1400→800, loop_data 最大~604B, 省 600B .bss */ char *p = payload; int remaining = sizeof(payload); int written; const char *freq_level_names[] = {"high", "mid_high", "mid_low", "low"}; uint8_t i; uint8_t coil_n = _cached_sr.coil_count; uint32_t my_msg_id = g_iot_msg_id + 1; /* iot_mqtt_publish 内部 ++g_iot_msg_id, 这里只预读 */ if (coil_n > 4) coil_n = 4; /* 硬限: 防坏帧致 snprintf 循环溢出 */ /* 先写外层包装头 (msg_id/cmd/ts/data) */ written = snprintf(p, remaining, "{\"msg_id\":%lu,\"cmd\":\"loop_data\",\"ts\":%lu,\"data\":{\"channels\":[", (unsigned long)my_msg_id, dev_time_now()); if (written < 0 || written >= remaining) return; p += written; remaining -= written; for (i = 0; i < coil_n; i++) { const LUP_CoilSensor *cs = &_cached_sr.coils[i]; const char *misc_type_str = "time"; uint32_t misc_val = 0; if (cs->misc_type == 0) { misc_type_str = "time"; misc_val = cs->misc.passtime_ms; } else if (cs->misc_type == 1) { misc_type_str = "cut_count"; misc_val = cs->misc.cut_amount; } else if (cs->misc_type == 2) { misc_type_str = "flow_count"; misc_val = cs->misc.flow_amount; } else if (cs->misc_type == 3) { misc_type_str = "relay_count"; misc_val = cs->misc.relay_count; } written = snprintf(p, remaining, "%s{\"ch\":%d,\"level\":\"%s\",\"iscar\":%s," "\"loop_ok\":%s,\"freq\":%lu,\"diff\":%d," "\"sens\":%d,\"cndtn\":%d," "\"misc\":{\"type\":\"%s\",\"value\":%lu}}", (i > 0) ? "," : "", i + 1, freq_level_names[cs->freq_level], cs->car_state ? "true" : "false", cs->loop_state ? "false" : "true", cs->freq, cs->variation, cs->sensitivity, cs->condition, misc_type_str, misc_val); if (written < 0 || written >= remaining) return; p += written; remaining -= written; } snprintf(p, remaining, "]}}"); /* 用 iot_mqtt_publish: 发送缓冲 buf[1024] 与 mqttBuf[1024] 物理隔离, 避免 event_report 的 MQTT 二进制污染 loop_data 载荷 (2026-07-23 _raw 事故 v3) */ { char topic[IOT_MQTT_TOPIC_MAX_LEN]; snprintf(topic, sizeof(topic), "dld960/%s/dev", g_iot_dev_serial); iot_mqtt_publish(topic, payload, strlen(payload), 0); } } /*=========================================================================== * 连接管理 *===========================================================================*/ /* 连接到 MQTT Broker — 重新创建 TCP socket 并发起连接 */ static void iot_connect_broker(void) { WCHNET_CreateTcpMqttSocket(); // 重新 create + connect (不是复用旧的!) g_iot_socket = SocketId_TCP; g_iot_state = IOT_STATE_TCP_CONNECTING; _iot_connect_start = mstick(); PRINT("IOT: TCP connecting to broker (sock=%d)...\n", g_iot_socket); } /*=========================================================================== * Socket 中断处理 *===========================================================================*/ void iot_mqtt_handle_sock_int(uint8_t socketid, uint8_t intstat) { if (socketid != g_iot_socket) return; /* CONNECT 成功 — 在中断上下文直接发 MQTT CONNECT (对齐旧 mqtt_connect 行为: WCHNET SocketSend 在中断外会 hard fault) */ if (intstat & SINT_STAT_CONNECT) { PRINT("IOT: TCP connected (sock=%d)\n", socketid); g_iot_state = IOT_STATE_TCP_CONNECTED; _iot_recv_len = 0; _iot_send_fail_cnt = 0; // 新连接, 重置失败计数 iot_mqtt_send_connect(); // 在中断上下文发, 不延后到 poll g_iot_state = IOT_STATE_MQTT_CONNECTING; } /* 收到数据 */ if (intstat & SINT_STAT_RECV) { uint32_t recv_len = WCHNET_SocketRecvLen(socketid, NULL); if (recv_len > 0) { uint16_t space = IOT_MQTT_RECV_BUF_LEN - _iot_recv_len; if (recv_len > space) recv_len = space; uint32_t rd_len = recv_len; static uint8_t tmp[RECE_BUF_LEN]; /* static: 1152B 栈分配在中断上下文中会撑爆 2KB 栈 (2026-07-23) */ WCHNET_SocketRecv(socketid, tmp, &rd_len); memcpy(_iot_recv_buf + _iot_recv_len, tmp, (uint16_t)rd_len); _iot_recv_len += (uint16_t)rd_len; iot_process_recv(); } } /* 断开 / 超时 */ if (intstat & (SINT_STAT_DISCONNECT | SINT_STAT_TIM_OUT)) { PRINT("IOT: socket disconnect/timeout (sock=%d)\n", socketid); g_iot_state = IOT_STATE_DISCONNECTED; g_iot_socket = 0xFF; _iot_recv_len = 0; _cached_sr_valid = 0; // 清缓存: 重连后等新帧 _last_publish_ms = 0; // 复位: 重连后立即首发 _iot_reconnect_backoff = IOT_MQTT_RECONNECT_MIN_MS; _iot_reconnect_deadline = mstick() + _iot_reconnect_backoff; } } /*=========================================================================== * 硬件看门狗 IWDG — 主循环卡死保护 * LSI≈40kHz, Prescaler=256, Reload=625 → ~4s 超时 * 保活链路: MQTT PINGREQ/PINGRESP → TCP KeepAlive → IWDG * (heartbeat 是单向设备上报, 平台不回复, 不能用作存活检测) *===========================================================================*/ /* IWDG 初始化 */ void iot_watchdog_init(void) { IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable); IWDG_SetPrescaler(IWDG_Prescaler_256); IWDG_SetReload(625); // 625 × (256/40000) ≈ 4.0s IWDG_ReloadCounter(); IWDG_Enable(); PRINT("IOT: IWDG init ok, timeout≈4s\n"); } /* 喂狗 — 主循环每轮调用 */ void iot_watchdog_kick(void) { IWDG_ReloadCounter(); } /*=========================================================================== * 主循环轮询 *===========================================================================*/ void iot_mqtt_poll(void) { iot_watchdog_kick(); // 喂硬件 IWDG /* 事件日志: MQTT 状态沿检测 (主循环上下文, 不在 socket 中断里写 SPI) 真复位 → 会有 BOOT 事件 + boot_seq 递增; 仅断连重连 → 只有以下网络事件 */ if (g_iot_state != _prev_iot_state) { switch (g_iot_state) { case IOT_STATE_MQTT_CONNECTED: offlog_iot_connect(); break; // TCP+CONNACK 成功 case IOT_STATE_READY: offlog_iot_ready(); break; // SUBACK → 将发 initialize case IOT_STATE_DISCONNECTED: offlog_iot_disconnect(1); break; // 断连(细分原因在各分支单独记) default: break; } _prev_iot_state = g_iot_state; } /* 断线重连 */ if (g_iot_state == IOT_STATE_DISCONNECTED && g_iot_socket == 0xFF) { if (_iot_reconnect_deadline == 0 || mstick() > _iot_reconnect_deadline) { iot_connect_broker(); if (g_iot_socket == 0xFF) { // 连接失败, 退避 if (_iot_reconnect_backoff == 0) { _iot_reconnect_backoff = IOT_MQTT_RECONNECT_MIN_MS; } else { _iot_reconnect_backoff *= 2; if (_iot_reconnect_backoff > IOT_MQTT_RECONNECT_MAX_MS) _iot_reconnect_backoff = IOT_MQTT_RECONNECT_MAX_MS; } _iot_reconnect_deadline = mstick() + _iot_reconnect_backoff; offlog_iot_reconn(_iot_reconnect_backoff); // 事件日志: 重连退避 PRINT("IOT: reconnect in %lu ms\n", _iot_reconnect_backoff); } } return; } /* TCP 连接超时 (10s) */ if (g_iot_state == IOT_STATE_TCP_CONNECTING) { if (mstick() - _iot_connect_start > 10000) { PRINT("IOT: TCP connect timeout\n"); offlog_iot_disconnect(4); // 事件日志: 连接超时 WCHNET_SocketClose(g_iot_socket, TCP_CLOSE_NORMAL); g_iot_socket = 0xFF; g_iot_state = IOT_STATE_DISCONNECTED; return; } } /* TCP 已连接 — 发送 MQTT CONNECT（延迟到 poll 而非中断内） */ if (g_iot_state == IOT_STATE_TCP_CONNECTED) { iot_mqtt_send_connect(); g_iot_state = IOT_STATE_MQTT_CONNECTING; } /* MQTT Keepalive — PINGREQ (60s, broker 不回 → TCP 超时 → 重连) loop_data 按平台下发 g_report_cfg.interval 上报, 无需额外 heartbeat JSON */ if (g_iot_state == IOT_STATE_READY) { uint32_t now = mstick(); if (now - _iot_last_heartbeat > IOT_MQTT_HEARTBEAT_MS) { uint8_t ping_buf[2]; int ping_len = MQTTSerialize_pingreq(ping_buf, sizeof(ping_buf)); iot_mqtt_send(ping_buf, (uint16_t)ping_len); _iot_last_heartbeat = now; } } } /*=========================================================================== * 初始化 *===========================================================================*/ void iot_mqtt_init(void) { /* 复用 net_srv.c 创建的 MQTT socket (SocketId_TCP) */ g_iot_socket = SocketId_TCP; /* 初始化设备序列码 (12 hex chars) */ snprintf(g_iot_dev_serial, sizeof(g_iot_dev_serial), "%02X%02X%02X%02X%02X%02X", g_dev_number[0], g_dev_number[1], g_dev_number[2], g_dev_number[3], g_dev_number[4], g_dev_number[5]); PRINT("IOT: dev_serial=%s\n", g_iot_dev_serial); /* 初始化传感器回调 — uart_srv 消费路径的 0xC0 帧喂入事件沿检测 (V1.04) */ lup_set_sensor_callback(iot_evt_sensor_cb); _iot_reconnect_backoff = 0; _iot_reconnect_deadline = mstick() + 2000; // 启动后 2s 开始首次连接 g_iot_state = IOT_STATE_DISCONNECTED; /* 初始化硬件看门狗 IWDG (LSI≈40kHz, 4s 超时, 主循环喂狗) */ iot_watchdog_init(); }