112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
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/* net_wifi.c - WiFi 后端（网络层下的通道实现之一）
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*
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* 组成：esp8266.c (ESP-01S AT驱动/TCP透传) + mqtt_client.c (软件MQTT 3.1.1)。
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* 连接顺序：硬件复位 → 等已存AP自动连接(20s) → 连固定SSID(60s) →
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* Smart Config 智能配网(60s) → 失败返回，由 network.c 切回 4G。
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* 运行阶段：mqttc_process 解析下行报文，30s 心跳保活，
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* 断链(CLOSED/心跳超时) 清 ready，由 network.c 调度重连或切回 4G。
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*/
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#include "net_wifi.h"
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#include "esp8266.h"
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#include "mqtt_client.h"
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#include "network.h"
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#include "air780e.h" /* bg_delay */
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#include "uart.h"
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#include "log.h"
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#include "stdio.h"
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#include "string.h"
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volatile uint8_t g_wifi_mqtt_ready = 0;
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volatile uint8_t g_wifi_first_publish_ok = 0;
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static uint32_t s_ping_tick = 0;
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/* 上行发布主题暂存 */
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static char s_topic_up[48];
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/*==== 阻塞建链：成功返回 0 并置 g_wifi_mqtt_ready ====*/
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int net_wifi_init(void)
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{
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log_info("> WiFi: init...");
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g_wifi_mqtt_ready = 0;
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g_wifi_first_publish_ok = 0;
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esp_gpio_init();
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UART4_StartRx();
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if (esp_reset() != 0) return -1;
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if (esp_send_cmd("AT", "OK", 2000) != 0) return -1;
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esp_send_cmd("ATE0", "OK", 1000); /* 关回显，失败不致命 */
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if (esp_send_cmd("AT+CWMODE=1", "OK", 2000) != 0) return -1;
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/* ① 优先等模块自动连接已保存的AP（SmartConfig/历史CWJAP保存的）；
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② 失败则连代码里固定的SSID(60s)；③ 再失败进SmartConfig(60s) */
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if (esp_wait_got_ip(20) != 0) {
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if (esp_join_fixed_ap() != 0) {
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if (esp_smartconfig() != 0) {
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log_warn("> WiFi: all AP attempts failed");
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return -1;
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}
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}
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}
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/* TCP 透传到 MQTT 服务器 */
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if (esp_enter_transparent(MqttInfoStr.ServerIP, MqttInfoStr.ServerPort) != 0) return -1;
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/* 软件 MQTT 建链 + 订阅下行主题 */
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mqttc_init(MqttInfoStr.ClientID, MqttInfoStr.Username, MqttInfoStr.Passward);
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if (mqttc_connect() != 0) return -1;
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{
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char topic_down[48];
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snprintf(topic_down, sizeof(topic_down), "%s%s", MqttInfoStr.Topic, MqttInfoStr.ClientID);
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if (mqttc_subscribe(topic_down) != 0) return -1;
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snprintf(s_topic_up, sizeof(s_topic_up), "/iot/data/up/%s", MqttInfoStr.ClientID);
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}
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g_wifi_mqtt_ready = 1;
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s_ping_tick = HAL_GetTick();
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log_info("> WiFi: Ready");
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/* 就绪后上报一次电量，与 4G 就绪行为对齐（同时标记首次发布成功） */
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NET_publish_power(1);
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return 0;
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}
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/*==== 非阻塞轮询：下行报文解析 + 心跳保活 ====*/
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void net_wifi_process(void)
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{
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if (!g_wifi_mqtt_ready) return;
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int r;
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while ((r = mqttc_process()) == 1) { }
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if (r == -1) {
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log_warn("> WiFi: TCP closed, need reconnect");
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g_wifi_mqtt_ready = 0;
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return;
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}
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/* 30s 一次 PINGREQ；上一帧 PINGREQ 未收到 PINGRESP 判断链 */
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if (HAL_GetTick() - s_ping_tick >= 30000) {
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if (g_mqttc_ping_outstanding) {
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log_warn("> WiFi: ping timeout, need reconnect");
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g_wifi_mqtt_ready = 0;
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return;
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}
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s_ping_tick = HAL_GetTick();
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mqttc_ping();
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}
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}
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/*==== 上行发布 ====*/
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void net_wifi_publish_up(const char *json)
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{
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if (!g_wifi_mqtt_ready) return;
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if (mqttc_publish(s_topic_up, json) == 0 && !g_wifi_first_publish_ok) {
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g_wifi_first_publish_ok = 1;
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log_info("> WiFi: first publish ok");
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}
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}
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