wangfq
884a622cab
- IOT_MQTT_RECV_BUF_LEN: 2048 → 1024 - IOT_MQTT_SEND_BUF_LEN: 2048 → 1024 - data_json 改用宏 - iot_handle_publish 的 json[] 改 static 防栈溢出
639 lines
24 KiB
C
639 lines
24 KiB
C
/**
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******************************************************************************
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* @file iot_mqtt_srv.c
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* @author wangfq
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* @version V1.0
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* @date 2026-07-03
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* @brief IoT MQTT 客户端实现 — DLD960 IoT 协议
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*
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* 连接流程: TCP connect → MQTT CONNECT → CONNACK → SUBSCRIBE → SUBACK → READY
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* 断线重连: 指数退避 5s~60s
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* 数据上报: loop_data / event_report / heartbeat
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******************************************************************************
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*/
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#include "CONFIG.h"
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#include "iot_mqtt_srv.h"
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#include "eth_driver.h"
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#include "wchnet.h"
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#include "net_srv.h"
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#include "MQTTPacket.h"
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#include "cmcng.h"
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#include "loop_uart_proto.h"
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#include "simple_json.h"
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#include "storage.h"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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/*===========================================================================
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* Global State
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*===========================================================================*/
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extern uint8_t g_report_active; // from tcp_json_srv.c, 0=inactive 1=active
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uint8_t g_iot_socket = 0xFF; // MQTT TCP socket ID
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IotMqttState g_iot_state = IOT_STATE_DISCONNECTED;
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uint8_t g_iot_msg_id = 0; // MQTT packet identifier
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static uint32_t _iot_last_heartbeat = 0; // 上次心跳时刻 (ms)
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static uint32_t _iot_reconnect_deadline = 0;
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static uint32_t _iot_reconnect_backoff = 0;
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static uint32_t _iot_connect_start = 0; // TCP connect 开始时刻
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/*===========================================================================
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* Buffers
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*===========================================================================*/
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static uint8_t _iot_recv_buf[IOT_MQTT_RECV_BUF_LEN];
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static uint16_t _iot_recv_len = 0;
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static uint8_t _iot_send_buf[IOT_MQTT_SEND_BUF_LEN];
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static uint8_t _iot_wchnet_buf[RECE_BUF_LEN]; // WCHNET internal recv buffer
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/*===========================================================================
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* Topic 构建
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*===========================================================================*/
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static char g_iot_dev_serial[13]; // 设备序列码 (12 hex chars)
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/* 构建 topic: dld960/{sn}/... */
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static int iot_make_topic(char *out, uint16_t out_len, const char *direction,
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const char *category, const char *sub) {
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if (sub) {
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return snprintf(out, out_len, "dld960/%s/%s/%s/%s",
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g_iot_dev_serial, direction, category, sub);
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}
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return snprintf(out, out_len, "dld960/%s/%s/%s",
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g_iot_dev_serial, direction, category);
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}
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/*===========================================================================
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* MQTT Packet Helpers
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*===========================================================================*/
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/* 发送 MQTT 报文到 broker */
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static int iot_mqtt_send(const uint8_t *buf, uint16_t len) {
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uint16_t slen = len;
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PRINT("IOT: SocketSend sock=%d len=%d\n", g_iot_socket, len);
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uint8_t ret = WCHNET_SocketSend(g_iot_socket, (uint8_t *)buf, &slen);
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PRINT("IOT: SocketSend ret=0x%02X sent=%d\n", ret, slen);
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return (ret == WCHNET_ERR_SUCCESS) ? 0 : -1;
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}
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/* 发送 MQTT CONNECT */
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static int iot_mqtt_send_connect(void) {
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static MQTTPacket_connectData opts; // static: 避免 85字节栈开销
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static uint8_t buf[256]; // static: 避免 256字节栈开销
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int len;
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// struct assignment 不支持 brace initializer，用临时变量中转
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{ MQTTPacket_connectData _init = MQTTPacket_connectData_initializer; opts = _init; }
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opts.MQTTVersion = 4; // MQTT 3.1.1
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opts.keepAliveInterval = IOT_MQTT_KEEPALIVE_SEC;
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opts.cleansession = 1;
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// clientID
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if (strlen((char *)iot_net_info.client_id) > 0) {
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opts.clientID.cstring = (char *)iot_net_info.client_id;
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} else {
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opts.clientID.cstring = g_iot_dev_serial;
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}
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// username / password
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if (strlen((char *)iot_net_info.username) > 0) {
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opts.username.cstring = (char *)iot_net_info.username;
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}
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if (strlen((char *)iot_net_info.password) > 0) {
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opts.password.cstring = (char *)iot_net_info.password;
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}
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len = MQTTSerialize_connect(buf, sizeof(buf), &opts);
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if (len <= 0) {
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PRINT("IOT: MQTTSerialize_connect failed\n");
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return -1;
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}
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PRINT("IOT: → CONNECT clientId=%s keepAlive=%d\n",
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opts.clientID.cstring, opts.keepAliveInterval);
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return iot_mqtt_send(buf, (uint16_t)len);
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}
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/* 发送 MQTT SUBSCRIBE */
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static int iot_mqtt_send_subscribe(void) {
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static uint8_t buf[256]; // static: 避免栈溢出
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int len;
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char topic[IOT_MQTT_TOPIC_MAX_LEN];
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MQTTString topics[3];
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int qos[3] = {1, 1, 1};
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int count = 0;
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// 订阅服务器下发消息
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iot_make_topic(topic, sizeof(topic), "srv", "config", "set");
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topics[count].cstring = topic; topics[count].lenstring.len = 0; count++;
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iot_make_topic(topic, sizeof(topic), "srv", "config", "query");
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topics[count].cstring = topic; topics[count].lenstring.len = 0; count++;
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iot_make_topic(topic, sizeof(topic), "srv", "ctrl", NULL);
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topics[count].cstring = topic; topics[count].lenstring.len = 0; count++;
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len = MQTTSerialize_subscribe(buf, sizeof(buf), 0,
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++g_iot_msg_id, count, topics, qos);
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if (len <= 0) {
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PRINT("IOT: MQTTSerialize_subscribe failed\n");
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return -1;
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}
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PRINT("IOT: → SUBSCRIBE pktId=%d topics=%d\n", g_iot_msg_id, count);
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return iot_mqtt_send(buf, (uint16_t)len);
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}
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/* 发送 MQTT PUBLISH */
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static int iot_mqtt_publish(const char *topic, const char *payload,
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uint16_t payload_len, uint8_t qos) {
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static uint8_t buf[IOT_MQTT_SEND_BUF_LEN]; // static: 避免 2KB 栈溢出
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int len;
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MQTTString mqtt_topic = MQTTString_initializer;
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mqtt_topic.cstring = (char *)topic;
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len = MQTTSerialize_publish(buf, sizeof(buf), 0, qos, 0,
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++g_iot_msg_id, mqtt_topic,
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(unsigned char *)payload, payload_len);
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if (len <= 0) {
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PRINT("IOT: MQTTSerialize_publish failed\n");
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return -1;
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}
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return iot_mqtt_send(buf, (uint16_t)len);
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}
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/*===========================================================================
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* MQTT 接收处理
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*===========================================================================*/
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/* 处理一条收到的 MQTT PUBLISH 消息 */
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static void iot_handle_publish(const char *topic, uint8_t *payload, int payload_len) {
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static char json[IOT_MQTT_RECV_BUF_LEN]; // static: 避免 1KB 栈开销
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int copy_len = payload_len < (int)sizeof(json) - 1 ? payload_len : (int)sizeof(json) - 1;
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memcpy(json, payload, copy_len);
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json[copy_len] = '\0';
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PRINT("IOT: PUBLISH topic=%s payload=%s\n", topic, json);
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/* 提取 msg_id 和 cmd */
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char tmp[256];
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uint32_t msg_id = 0;
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// 简单提取: 解析 JSON 中的 msg_id 和 cmd
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memset(tmp, 0, sizeof(tmp));
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simple_parse_json(json, "\"msg_id\"", tmp);
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if (strlen(tmp) > 0) msg_id = (uint32_t)strtoul(tmp, NULL, 10);
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memset(tmp, 0, sizeof(tmp));
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simple_parse_json(json, "\"cmd\"", tmp);
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// strip quotes
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char *cmd_str = tmp;
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if (cmd_str[0] == '"') cmd_str++;
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int cmd_len = strlen(cmd_str);
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if (cmd_len > 0 && cmd_str[cmd_len - 1] == '"') cmd_str[cmd_len - 1] = '\0';
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if (strlen(cmd_str) == 0) {
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PRINT("IOT: no cmd in PUBLISH\n");
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return;
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}
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/* 构建响应 topic */
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char resp_topic[IOT_MQTT_TOPIC_MAX_LEN];
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iot_make_topic(resp_topic, sizeof(resp_topic), "dev", "config", "resp");
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/* 处理命令 — 复用 TCP JSON 的命令逻辑 */
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/* 目前仅实现基本响应框架, 后续逐步对接 Loop MCU 命令 */
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if (strcmp(cmd_str, "dev_info_query") == 0) {
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char data_json[512];
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snprintf(data_json, sizeof(data_json),
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"{\"msg_id\":%lu,\"cmd\":\"dev_info_query\","
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"\"ts\":%lu,\"code\":0,\"msg\":\"success\","
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"\"data\":{"
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"\"dev_serial\":\"%s\",\"hard_ver\":\"%s\",\"soft_ver\":\"%s\","
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"\"model\":\"%s\",\"product_code\":\"960001\","
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"\"sub_code\":{\"net\":%s,\"iot\":%s},"
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"\"bus\":{\"bus1\":0,\"bus2\":0,\"bus3\":0,\"bus4\":0}}}",
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msg_id, mstick() / 1000,
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g_dev_number_str, HARDWARE_VER, FIRMWARE_VER, PRODUCT_MODEL,
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g_sub_code_enable.net_enable ? "true" : "false",
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g_sub_code_enable.iot_enable ? "true" : "false");
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iot_mqtt_publish(resp_topic, data_json, strlen(data_json), 1);
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} else if (strcmp(cmd_str, "pwd_verify") == 0) {
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// 验证密码
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char password[16] = {0};
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char *data = (char *)malloc(512);
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if (data) {
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memset(data, 0, 512);
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simple_parse_json(json, "\"data\"", data);
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if (strlen(data) > 0) {
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memset(tmp, 0, sizeof(tmp));
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simple_parse_json(data, "\"password\"", tmp);
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// strip quotes
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char *pwd = tmp;
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if (pwd[0] == '"') pwd++;
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int plen = strlen(pwd);
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if (plen > 0 && pwd[plen - 1] == '"') pwd[plen - 1] = '\0';
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strncpy(password, pwd, 15);
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}
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free(data);
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}
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if (strlen(password) == 6 && memcmp(password, g_dev_password, 6) == 0) {
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char resp[256];
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snprintf(resp, sizeof(resp),
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"{\"msg_id\":%lu,\"cmd\":\"pwd_verify\","
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"\"ts\":%lu,\"code\":0,\"msg\":\"success\"}",
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msg_id, mstick() / 1000);
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iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
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PRINT("IOT: Auth success via MQTT\n");
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} else {
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char resp[256];
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snprintf(resp, sizeof(resp),
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"{\"msg_id\":%lu,\"cmd\":\"pwd_verify\","
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"\"ts\":%lu,\"code\":2,\"msg\":\"password incorrect\"}",
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msg_id, mstick() / 1000);
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iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
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}
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} else {
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// 暂不支持的命令, 返回错误
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char resp[256];
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snprintf(resp, sizeof(resp),
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"{\"msg_id\":%lu,\"cmd\":\"%s\","
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"\"ts\":%lu,\"code\":4,\"msg\":\"unsupported command\"}",
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msg_id, cmd_str, mstick() / 1000);
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iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
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}
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}
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/* 处理 MQTT SUBACK */
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static void iot_handle_suback(void) {
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PRINT("IOT: ← SUBACK, topics subscribed\n");
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g_iot_state = IOT_STATE_READY;
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_iot_reconnect_backoff = 0; // 连接成功, 重置退避
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}
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/* 处理收到的 MQTT 数据 */
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static void iot_process_recv(void) {
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uint8_t header;
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int qos, payload_len;
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unsigned char retained;
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unsigned short packet_id;
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MQTTString topic;
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unsigned char *payload_ptr;
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while (_iot_recv_len >= 2) {
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header = _iot_recv_buf[0];
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int msg_type = (header >> 4) & 0x0F;
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/* 先尝试解析整个 MQTT 包 */
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int mqtt_pkt_len = 0;
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int multiplier = 1;
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int rem_len = 0;
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int i = 1;
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while (i < (int)_iot_recv_len && i < 5) {
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rem_len += (_iot_recv_buf[i] & 0x7F) * multiplier;
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multiplier *= 128;
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if ((_iot_recv_buf[i] & 0x80) == 0) {
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mqtt_pkt_len = 1 + (i - 1 + 1) + rem_len; // header + rem_len_bytes + payload
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break;
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}
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i++;
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}
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if (mqtt_pkt_len == 0 || mqtt_pkt_len > (int)_iot_recv_len) {
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return; // 包不完整, 等更多数据
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}
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PRINT("IOT: ← MQTT packet type=%d len=%d\n", msg_type, mqtt_pkt_len);
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switch (msg_type) {
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case CONNACK: {
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unsigned char session_present, connack_rc;
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if (MQTTDeserialize_connack(&session_present, &connack_rc,
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_iot_recv_buf, mqtt_pkt_len) == 1) {
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PRINT("IOT: ← CONNACK rc=%d\n", connack_rc);
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if (connack_rc == 0) {
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// 连接成功 → 订阅
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g_iot_state = IOT_STATE_MQTT_CONNECTED;
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iot_mqtt_send_subscribe();
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} else {
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PRINT("IOT: CONNACK rejected, rc=%d\n", connack_rc);
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g_iot_state = IOT_STATE_DISCONNECTED;
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}
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}
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break;
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}
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case SUBACK:
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iot_handle_suback();
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break;
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case PUBLISH: {
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unsigned char pub_dup;
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if (MQTTDeserialize_publish(&pub_dup, &qos, &retained,
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&packet_id, &topic,
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&payload_ptr, &payload_len,
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_iot_recv_buf, mqtt_pkt_len) == 1) {
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char topic_str[IOT_MQTT_TOPIC_MAX_LEN];
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memcpy(topic_str, topic.cstring ? topic.cstring : "",
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topic.lenstring.len < (int)sizeof(topic_str) - 1
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? topic.lenstring.len : (int)sizeof(topic_str) - 1);
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topic_str[topic.lenstring.len] = '\0';
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iot_handle_publish(topic_str, payload_ptr, payload_len);
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// 如果 QoS > 0, 发送 PUBACK
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if (qos > 0) {
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uint8_t ack_buf[4];
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int ack_len = MQTTSerialize_ack(ack_buf, sizeof(ack_buf),
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PUBACK, 0, packet_id);
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iot_mqtt_send(ack_buf, (uint16_t)ack_len);
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}
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}
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break;
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}
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case PINGRESP:
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PRINT("IOT: ← PINGRESP\n");
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break;
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default:
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break;
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}
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/* 移除已处理的包 */
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memmove(_iot_recv_buf, _iot_recv_buf + mqtt_pkt_len,
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_iot_recv_len - mqtt_pkt_len);
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_iot_recv_len -= mqtt_pkt_len;
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}
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}
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/*===========================================================================
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* 传感器数据上报
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*===========================================================================*/
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void iot_mqtt_publish_sensor(void) {
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if (g_iot_state != IOT_STATE_READY) return;
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if (!g_report_active) return;
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/* 复用 g_pkg_uart_2 中的传感器帧 */
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if (g_pkg_uart_2.flag == 0) return;
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if (g_pkg_uart_2.pkg[0] != 0x7F) return;
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if (g_pkg_uart_2.pkg[3] != 0xC0) return;
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LUP_SensorReport sr;
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memset(&sr, 0, sizeof(sr));
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int ret = lup_parse_sensor_report(g_pkg_uart_2.pkg, g_pkg_uart_2.offset, &sr);
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if (ret != 0) {
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PRINT("IOT: sensor parse failed (%d)\n", ret);
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InitPkgUart(&g_pkg_uart_2);
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return;
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}
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/* 构建 loop_data JSON */
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static char data_json[IOT_MQTT_SEND_BUF_LEN]; // static: 避免栈溢出
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char *p = data_json;
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int remaining = sizeof(data_json);
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int written;
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uint8_t i;
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written = snprintf(p, remaining,
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"{\"channels\":[");
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if (written < 0 || written >= remaining) goto done;
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p += written; remaining -= written;
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for (i = 0; i < sr.coil_count; i++) {
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const LUP_CoilSensor *cs = &sr.coils[i];
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const char *misc_type_str = "time";
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uint32_t misc_val = 0;
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if (cs->misc_type == 0) { misc_type_str = "time"; misc_val = cs->misc.passtime_ms; }
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else if (cs->misc_type == 1) { misc_type_str = "cut_count"; misc_val = cs->misc.cut_amount; }
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else if (cs->misc_type == 2) { misc_type_str = "flow_count"; misc_val = cs->misc.flow_amount; }
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else if (cs->misc_type == 3) { misc_type_str = "relay_count"; misc_val = cs->misc.relay_count; }
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const char *freq_level_names[] = {"high", "mid_high", "mid_low", "low"};
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written = snprintf(p, remaining,
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"%s{\"ch\":%d,\"freq_level\":\"%s\",\"has_car\":%s,"
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"\"loop_ok\":%s,\"freq_current\":%lu,\"freq_diff\":%d,"
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"\"sensitivity\":%d,\"condition\":%d,"
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"\"misc\":{\"type\":\"%s\",\"value\":%lu}}",
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(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) goto done;
|
|
p += written; remaining -= written;
|
|
}
|
|
|
|
snprintf(p, remaining, "]}");
|
|
|
|
/* 包装为通用消息格式 */
|
|
static char payload[IOT_MQTT_SEND_BUF_LEN]; // static: 避免 2KB 栈溢出
|
|
snprintf(payload, sizeof(payload),
|
|
"{\"msg_id\":%d,\"cmd\":\"loop_data\",\"ts\":%lu,\"data\":%s}",
|
|
++g_iot_msg_id, mstick() / 1000, data_json);
|
|
|
|
char topic[IOT_MQTT_TOPIC_MAX_LEN];
|
|
iot_make_topic(topic, sizeof(topic), "dev", "data", "loop");
|
|
iot_mqtt_publish(topic, payload, strlen(payload), 0);
|
|
|
|
done:
|
|
InitPkgUart(&g_pkg_uart_2);
|
|
}
|
|
|
|
/*===========================================================================
|
|
* 心跳上报
|
|
*===========================================================================*/
|
|
static void iot_send_heartbeat(void) {
|
|
if (g_iot_state != IOT_STATE_READY) return;
|
|
|
|
char payload[512];
|
|
uint8_t loop_ok[4] = {1, 1, 1, 1};
|
|
uint8_t i;
|
|
for (i = 0; i < 4; i++) {
|
|
/* 简化: 读取线圈状态 */
|
|
loop_ok[i] = 1; // TODO: 从 Loop MCU 获取实际状态
|
|
}
|
|
|
|
snprintf(payload, sizeof(payload),
|
|
"{\"msg_id\":%d,\"cmd\":\"heartbeat\","
|
|
"\"ts\":%lu,\"data\":{"
|
|
"\"uptime\":%lu,\"loop_status\":[%s,%s,%s,%s],"
|
|
"\"net_status\":true,\"iot_status\":true}}",
|
|
++g_iot_msg_id, mstick() / 1000,
|
|
mstick() / 1000,
|
|
loop_ok[0] ? "true" : "false", loop_ok[1] ? "true" : "false",
|
|
loop_ok[2] ? "true" : "false", loop_ok[3] ? "true" : "false");
|
|
|
|
char topic[IOT_MQTT_TOPIC_MAX_LEN];
|
|
iot_make_topic(topic, sizeof(topic), "dev", "status", NULL);
|
|
iot_mqtt_publish(topic, payload, strlen(payload), 0);
|
|
}
|
|
|
|
/*===========================================================================
|
|
* 连接管理
|
|
*===========================================================================*/
|
|
|
|
/* 连接到 MQTT Broker */
|
|
static void iot_connect_broker(void) {
|
|
uint8_t broker_ip[4];
|
|
SOCK_INF sock_inf;
|
|
uint8_t ret;
|
|
|
|
// 解析 broker 地址
|
|
if (get_ipstr_to_array((char *)iot_net_info.remote_addr, broker_ip) == 0) {
|
|
// 是 IP 地址 — get_ipstr_to_array 已将结果写入 broker_ip，无需 memcpy
|
|
PRINT("IOT: broker IP %d.%d.%d.%d:%d\n",
|
|
broker_ip[0], broker_ip[1], broker_ip[2], broker_ip[3],
|
|
iot_net_info.mqtt_port);
|
|
} else {
|
|
PRINT("IOT: broker hostname=%s (DNS not implemented yet)\n",
|
|
iot_net_info.remote_addr);
|
|
return;
|
|
}
|
|
|
|
memset(&sock_inf, 0, sizeof(SOCK_INF));
|
|
sock_inf.DesPort = iot_net_info.mqtt_port;
|
|
sock_inf.ProtoType = PROTO_TYPE_TCP;
|
|
sock_inf.RecvBufLen = RECE_BUF_LEN;
|
|
memcpy(sock_inf.IPAddr, broker_ip, 4);
|
|
|
|
ret = WCHNET_SocketCreat(&g_iot_socket, &sock_inf);
|
|
if (ret != WCHNET_ERR_SUCCESS) {
|
|
PRINT("IOT: SocketCreat failed: 0x%02X\n", ret);
|
|
g_iot_socket = 0xFF;
|
|
return;
|
|
}
|
|
|
|
ret = WCHNET_SocketConnect(g_iot_socket);
|
|
if (ret != WCHNET_ERR_SUCCESS) {
|
|
PRINT("IOT: SocketConnect failed: 0x%02X\n", ret);
|
|
WCHNET_SocketClose(g_iot_socket, TCP_CLOSE_NORMAL);
|
|
g_iot_socket = 0xFF;
|
|
return;
|
|
}
|
|
|
|
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 */
|
|
if (intstat & SINT_STAT_CONNECT) {
|
|
PRINT("IOT: TCP connected (sock=%d)\n", socketid);
|
|
WCHNET_ModifyRecvBuf(socketid, (uint32_t)_iot_wchnet_buf, RECE_BUF_LEN);
|
|
g_iot_state = IOT_STATE_TCP_CONNECTED;
|
|
_iot_recv_len = 0;
|
|
// 发送 MQTT CONNECT
|
|
iot_mqtt_send_connect();
|
|
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;
|
|
uint8_t tmp[RECE_BUF_LEN];
|
|
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;
|
|
_iot_reconnect_backoff = IOT_MQTT_RECONNECT_MIN_MS;
|
|
_iot_reconnect_deadline = mstick() + _iot_reconnect_backoff;
|
|
}
|
|
}
|
|
|
|
/*===========================================================================
|
|
* 主循环轮询
|
|
*===========================================================================*/
|
|
void iot_mqtt_poll(void) {
|
|
/* 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;
|
|
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");
|
|
WCHNET_SocketClose(g_iot_socket, TCP_CLOSE_NORMAL);
|
|
g_iot_socket = 0xFF;
|
|
g_iot_state = IOT_STATE_DISCONNECTED;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* MQTT Keepalive — PINGREQ */
|
|
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;
|
|
// 心跳上报
|
|
iot_send_heartbeat();
|
|
}
|
|
}
|
|
}
|
|
|
|
/*===========================================================================
|
|
* 初始化
|
|
*===========================================================================*/
|
|
void iot_mqtt_init(void) {
|
|
/* 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 — 用于 MQTT 上报 */
|
|
lup_set_sensor_callback(NULL); // MQTT 模式不需要 JSON 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;
|
|
}
|