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9629729dc945e269218d3af72306756e6bebad98
vd_960/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
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wangfq 9629729dc9 feat: IoT MQTT 客户端实现 — NET_SSC_ENABLE=0 时启用 
新增文件:
- iot_mqtt_srv.h/c: MQTT 客户端 (TCP→CONNECT→SUBSCRIBE→READY)
  支持: dev_info_query, pwd_verify (其他命令框架预留)
  上报: loop_data (传感器), heartbeat (心跳 60s)
  断线重连: 指数退避 5s~60s
  协议: DLD960 IoT MQTT V1.00 (dld960/{sn}/...)

修改:
- net_config.h: 新增 NET_IOT_ENABLE = !NET_SSC_ENABLE,
  IoT 模式分配 1 TCP socket (MQTT client)
- net_srv.c: IoT 初始化 + socket 中断路由
- peripheral_main.c: IoT poll + sensor publish 调用

模式:
  NET_SSC_ENABLE=1 → SCC + TCP JSON Server (原有行为)
  NET_SSC_ENABLE=0 → IoT MQTT Client (新增)
2026-07-03 17:36:22 +08:00

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/**
******************************************************************************
* @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 "storage.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
/*===========================================================================
* Global State
*===========================================================================*/
uint8_t g_iot_socket = 0xFF; // MQTT TCP socket ID
IotMqttState g_iot_state = IOT_STATE_DISCONNECTED;
uint8_t g_iot_msg_id = 0; // MQTT packet identifier
static uint32_t _iot_last_heartbeat = 0; // 上次心跳时刻 (ms)
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
/*===========================================================================
* 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 */
static int iot_mqtt_send(const uint8_t *buf, uint16_t len) {
uint16_t slen = len;
uint8_t ret = WCHNET_SocketSend(g_iot_socket, (uint8_t *)buf, &slen);
return (ret == WCHNET_ERR_SUCCESS) ? 0 : -1;
}
/* 发送 MQTT CONNECT */
static int iot_mqtt_send_connect(void) {
MQTTPacket_connectData opts = MQTTPacket_connectData_initializer;
uint8_t buf[256];
int len;
opts.MQTTVersion = 4; // MQTT 3.1.1
opts.keepAliveInterval = IOT_MQTT_KEEPALIVE_SEC;
opts.cleansession = 1;
// clientID
if (strlen((char *)iot_net_info.client_id) > 0) {
opts.clientID.cstring = (char *)iot_net_info.client_id;
} else {
opts.clientID.cstring = g_iot_dev_serial;
}
// username / password
if (strlen((char *)iot_net_info.username) > 0) {
opts.username.cstring = (char *)iot_net_info.username;
}
if (strlen((char *)iot_net_info.password) > 0) {
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 */
static int iot_mqtt_send_subscribe(void) {
uint8_t buf[256];
int len;
char topic[IOT_MQTT_TOPIC_MAX_LEN];
MQTTString topics[3];
int qos[3] = {1, 1, 1};
int count = 0;
// 订阅服务器下发消息
iot_make_topic(topic, sizeof(topic), "srv", "config", "set");
topics[count].cstring = topic; topics[count].lenstring.len = 0; count++;
iot_make_topic(topic, sizeof(topic), "srv", "config", "query");
topics[count].cstring = topic; topics[count].lenstring.len = 0; count++;
iot_make_topic(topic, sizeof(topic), "srv", "ctrl");
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) {
uint8_t buf[IOT_MQTT_SEND_BUF_LEN];
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) {
char json[IOT_MQTT_RECV_BUF_LEN];
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 */
char resp_topic[IOT_MQTT_TOPIC_MAX_LEN];
iot_make_topic(resp_topic, sizeof(resp_topic), "dev", "config", "resp");
/* 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, mstick() / 1000,
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, "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, mstick() / 1000);
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, mstick() / 1000);
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, mstick() / 1000);
iot_mqtt_publish(resp_topic, resp, strlen(resp), 1);
}
}
/* 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
}
/* 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);
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
*===========================================================================*/
void iot_mqtt_publish_sensor(void) {
if (g_iot_state != IOT_STATE_READY) return;
if (!g_report_active) return;
/* 复用 g_pkg_uart_2 中的传感器帧 */
if (g_pkg_uart_2.flag == 0) return;
if (g_pkg_uart_2.pkg[0] != 0x7F) return;
if (g_pkg_uart_2.pkg[3] != 0xC0) return;
LUP_SensorReport sr;
memset(&sr, 0, sizeof(sr));
int ret = lup_parse_sensor_report(g_pkg_uart_2.pkg, g_pkg_uart_2.offset, &sr);
if (ret != 0) {
PRINT("IOT: sensor parse failed (%d)\n", ret);
InitPkgUart(&g_pkg_uart_2);
return;
}
/* 构建 loop_data JSON */
char data_json[2048];
char *p = data_json;
int remaining = sizeof(data_json);
int written;
uint8_t i;
written = snprintf(p, remaining,
"{\"channels\":[");
if (written < 0 || written >= remaining) goto done;
p += written; remaining -= written;
for (i = 0; i < sr.coil_count; i++) {
const LUP_CoilSensor *cs = &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; }
const char *freq_level_names[] = {"high", "mid_high", "mid_low", "low"};
written = snprintf(p, remaining,
"%s{\"ch\":%d,\"freq_level\":\"%s\",\"has_car\":%s,"
"\"loop_ok\":%s,\"freq_current\":%lu,\"freq_diff\":%d,"
"\"sensitivity\":%d,\"condition\":%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) goto done;
p += written; remaining -= written;
}
snprintf(p, remaining, "]}");
/* 包装为通用消息格式 */
char payload[IOT_MQTT_SEND_BUF_LEN];
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");
iot_mqtt_publish(topic, payload, strlen(payload), 0);
}
/*===========================================================================
* 连接管理
*===========================================================================*/
/* 连接到 MQTT Broker */
static void iot_connect_broker(void) {
struct _WCHNET_IPAddr broker_ip;
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.a) == 0) {
// 是 IP 地址
memcpy(broker_ip.a, iot_net_info.remote_addr, 4);
PRINT("IOT: broker IP %d.%d.%d.%d:%d\n",
broker_ip.a[0], broker_ip.a[1], broker_ip.a[2], broker_ip.a[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.DestPort = iot_net_info.mqtt_port;
sock_inf.ProtoType = PROTO_TYPE_TCP;
sock_inf.RecvBufLen = RECE_BUF_LEN;
memcpy(sock_inf.DestAddr, broker_ip.a, 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;
}
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