1 代碼實現

直接代碼實現：

aliyun.h：

#ifndef __ALIYUN_H #define __ALIYUN_H#include <stdint.h> #include <stdbool.h>#define PORT 1883 #define SERVER "iot-as-mqtt.cn-shanghai.aliyuncs.com" //"a1gPAyS0jai.iot-as-mqtt.cn-shanghai.aliyuncs.com" #define TOPIC_SUB "thing/model/down_raw" //"/sys/a1gPAyS0jai/s0001/thing/model/down_raw" #define TOPIC_PUB "thing/model/up_raw" //"/sys/a1gPAyS0jai/s0001/thing/model/up_raw"typedef void(*aliyun_recv_callback)(uint8_t type,uint32_t id,uint8_t *pdata,uint16_t dada_len);bool aliyun_init(char *prokey,char *devname,char *devsecret); bool aliyun_deinit(void);bool aliyun_online(void); bool aliyun_offline(void); bool aliyun_send(uint8_t type,uint32_t id,uint8_t *pdata,uint16_t dada_len); bool aliyun_recv_register(aliyun_recv_callback cb);#endif

aliyun.c：

#include <stdbool.h> #include <string.h> #include <stdint.h> #include <stdio.h> #include "aliyun.h" #include "at_net.h" #include "dev_sim7020.h" #include "app_debug.h"#include "FreeRTOS.h" #include "task.h"#define MAX_SERVER_LEN 80 #define MAX_TOPIC_LEN 80static bool is_inited=false; typedef enum {ONLINE_STATE_CONNECT,ONLINE_STATE_ERR, }online_state_e;struct aliyun_control {char *prokey;char *devname;char *devsecret;char server[MAX_SERVER_LEN];char topic_sub[MAX_TOPIC_LEN];char topic_pub[MAX_TOPIC_LEN]; }ali_ctl;bool aliyun_init(char *prokey,char *devname,char *devsecret) {DEBUG("aliyun init");if(prokey==NULL)return false;if(devname==NULL)return false;if(devsecret==NULL)return false;memset(&ali_ctl,0,sizeof(ali_ctl));ali_ctl.prokey=prokey;ali_ctl.devname=devname;ali_ctl.devsecret=devsecret;snprintf(ali_ctl.server,MAX_SERVER_LEN,"%s.%s",prokey,SERVER);snprintf(ali_ctl.topic_sub,MAX_TOPIC_LEN,"/sys/%s/%s/%s",prokey,devname,TOPIC_SUB);snprintf(ali_ctl.topic_pub,MAX_TOPIC_LEN,"/sys/%s/%s/%s",prokey,devname,TOPIC_PUB);do{if(at_net_dev_register(&dev_sim7020)==false)break;if(at_net_init()==false)break;is_inited=true;DEBUG("aliyun init sucess"); return true;} while (0);aliyun_deinit();return false; } bool aliyun_deinit(void) {is_inited=false;at_net_dev_unregister();memset(&ali_ctl,0,sizeof(ali_ctl));return true; }bool aliyun_online(void) {uint8_t state=ONLINE_STATE_CONNECT;uint8_t err=0;while (1){switch (state){case ONLINE_STATE_CONNECT:if(at_net_mqtt_connect(ali_ctl.server,PORT,ali_ctl.prokey,ali_ctl.devname,ali_ctl.devsecret)==false)state= ONLINE_STATE_ERR; if(at_net_mqtt_sub(ali_ctl.topic_sub)==false)state= ONLINE_STATE_ERR;return true;case ONLINE_STATE_ERR:err++;if(err>3)return false;if(at_net_deinit()==false)break;if(at_net_init()==false)break;state=ONLINE_STATE_CONNECT;break;default:return false;}vTaskDelay(10);}return false; } bool aliyun_offline(void) {if(is_inited==false)return false;at_net_mqtt_disconnect();return true; }

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