Neptune开发板 使用libemqtt 点亮LED和关闭LED 原创
远道可思
发布于 2021-5-7 18:27
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通过对Neptune开发板 W800 SDK 内置libemqtt的学习和W800 mqtt示例代码分析
通过对W800 mqtt示例代码稍加增加完成了对LED灯的开关
主要增加
if(strcmp(msg,on)==0){
GpioSetOutputVal(WIFI_IOT_GPIO_PB_08, WIFI_IOT_GPIO_VALUE0);//打开LED8灯
}
else if(strcmp(msg,off)==0){
GpioSetOutputVal(WIFI_IOT_GPIO_PB_08, WIFI_IOT_GPIO_VALUE1);//关闭LED8灯
}
代码如下:(MQTT服务器-然也物联测试服务器)
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifi_connecter.h"
#include "lwip/inet.h"
#include "wm_sockets2.0.3.h"
#include <libemqtt.h>
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"
#include "wifiiot_gpio_w800.h"
#define MQTT_DEMO_RECV_BUF_LEN_MAX 1024
#define MQTT_DEMO_CMD_START 0x1
#define MQTT_DEMO_CMD_HEART 0x2
#define MQTT_DEMO_CMD_LOOP 0x3
#define MQTT_DEMO_READ_TIMEOUT (-1000)
#define MQTT_DEMO_READ_TIME_SEC 1
#define MQTT_DEMO_READ_TIME_US 0
#define MQTT_DEMO_CLIENT_ID "wm_mqtt_client" //ID
#define MQTT_DEMO_TX_PUB_TOPIC "test2020" //订阅主题
#define MQTT_DEMO_RX_PUB_TOPIC "test2049" //发布主题
#define MQTT_DEMO_SERVER_ADDR "test.ranye-iot.net" //IP地址 //http://www.ranye-iot.net/iot-platform.html 测试服务器
#define MQTT_DEMO_SERVER_PORT 1883 //端口
static uint8_t pcaket_buffer[MQTT_DEMO_RECV_BUF_LEN_MAX];
static int socket_id;
static int mqtt_keepalive = 300;
static mqtt_broker_handle_t mqtt_broker;
static int mqtt_demo_close_socket(mqtt_broker_handle_t *broker)
{
int fd = broker->socketid;
return closesocket(fd);
}
static int mqtt_demo_send_packet(int socket_info, const void *buf, unsigned int count)
{
int fd = socket_info;
return send(fd, buf, count, 0);
}
static int mqtt_demo_read_packet(int sec, int us)
{
int ret = 0;
if ((sec >= 0) || (us >= 0))
{
fd_set readfds;
struct timeval tmv;
// 初始化文件描述符集
FD_ZERO (&readfds);
FD_SET (socket_id, &readfds);
// 初始化超时数据结构
tmv.tv_sec = sec;
tmv.tv_usec = us;
// 如果超时,1如果输入可用,则选择返回0,如果错误,则为1
ret = select(socket_id + 1, &readfds, NULL, NULL, &tmv);
if(ret < 0)
return -2;
else if(ret == 0)
return MQTT_DEMO_READ_TIMEOUT;
}
int total_bytes = 0, bytes_rcvd, packet_length;
memset(pcaket_buffer, 0, sizeof(pcaket_buffer));
if((bytes_rcvd = recv(socket_id, (pcaket_buffer + total_bytes), MQTT_DEMO_RECV_BUF_LEN_MAX, 0)) <= 0)
{
//printf("%d, %d\r\n", bytes_rcvd, socket_id);
return -1;
}
//printf("recv [len=%d] : %s\n", bytes_rcvd, pcaket_buffer);
total_bytes += bytes_rcvd; // 保持总字节的计数
if (total_bytes < 2)
return -1;
// now we have the full fixed header in pcaket_buffer
// parse it for remaining length and number of bytes
uint16_t rem_len = mqtt_parse_rem_len(pcaket_buffer);
uint8_t rem_len_bytes = mqtt_num_rem_len_bytes(pcaket_buffer);
//packet_length = pcaket_buffer[1] + 2; // Remaining length + fixed header length
// total packet length = remaining length + byte 1 of fixed header + remaning length part of fixed header
packet_length = rem_len + rem_len_bytes + 1;
while(total_bytes < packet_length) // 读数据包
{
if((bytes_rcvd = recv(socket_id, (pcaket_buffer + total_bytes), MQTT_DEMO_RECV_BUF_LEN_MAX, 0)) <= 0)
return -1;
total_bytes += bytes_rcvd; // 保持总字节的计数
}
return packet_length;
}
static int mqtt_demo_init_socket(mqtt_broker_handle_t *broker, const char *hostname, short port, int keepalive)
{
int flag = 1;
struct hostent *hp;
// 创建套接字
if((socket_id = socket(PF_INET, SOCK_STREAM, 0)) < 0)
return -1;
// 禁用Nagle算法
if (setsockopt(socket_id, IPPROTO_TCP, 0x01, (char *)&flag, sizeof(flag)) < 0)
{
mqtt_demo_close_socket(&mqtt_broker);
return -2;
}
// 查询主机IP启动
hp = gethostbyname(hostname);
if (hp == NULL )
{
mqtt_demo_close_socket(&mqtt_broker);
return -2;
}
struct sockaddr_in socket_address;
memset(&socket_address, 0, sizeof(struct sockaddr_in));
socket_address.sin_family = AF_INET;
socket_address.sin_port = htons(port);
memcpy(&(socket_address.sin_addr), hp->h_addr, hp->h_length);
// 连接套接字
if((connect(socket_id, (struct sockaddr *)&socket_address, sizeof(socket_address))) < 0)
{
mqtt_demo_close_socket(&mqtt_broker);
return -1;
}
// MQTT stuffs
mqtt_set_alive(broker, mqtt_keepalive);
broker->socketid = socket_id;
broker->mqttsend = mqtt_demo_send_packet;
//printf("socket id = %d\n", socket_id);
return 0;
}
static int mqtt_demo_init(void)
{
int packet_length, ret = 0;
uint16_t msg_id, msg_id_rcv;
printf("step1: init mqtt lib.\r\n"); //步骤1:MQTT初始化
mqtt_init(&mqtt_broker, MQTT_DEMO_CLIENT_ID);
printf("step2: establishing TCP connection.\r\n");//步骤2:建立TCP连接
ret = mqtt_demo_init_socket(&mqtt_broker, MQTT_DEMO_SERVER_ADDR, MQTT_DEMO_SERVER_PORT, mqtt_keepalive);
if(ret)
{
printf("init_socket ret=%d\n", ret);
return -4;
}
printf("step3: establishing mqtt connection.\r\n");//步骤3:建立MQTT连接
ret = mqtt_connect(&mqtt_broker);
if(ret)
{
printf("mqtt_connect ret=%d\n", ret);
return -5;
}
packet_length = mqtt_demo_read_packet(MQTT_DEMO_READ_TIME_SEC, MQTT_DEMO_READ_TIME_US);
if(packet_length < 0)
{
printf("Error(%d) on read packet!\n", packet_length);
mqtt_demo_close_socket(&mqtt_broker);
return -1;
}
if(MQTTParseMessageType(pcaket_buffer) != MQTT_MSG_CONNACK||pcaket_buffer[3] != 0x00)
{
printf("CONNACK expected or failed!\n");
mqtt_demo_close_socket(&mqtt_broker);
return -2;
}
printf("step4: subscribe mqtt\r\n"); //步骤4:订阅MQTT
mqtt_subscribe(&mqtt_broker, MQTT_DEMO_TX_PUB_TOPIC, &msg_id);
packet_length = mqtt_demo_read_packet(MQTT_DEMO_READ_TIME_SEC, MQTT_DEMO_READ_TIME_US);
if(packet_length < 0)
{
printf("Error(%d) on read packet!\n", packet_length);
mqtt_demo_close_socket(&mqtt_broker);
return -1;
}
if(MQTTParseMessageType(pcaket_buffer) != MQTT_MSG_SUBACK)
{
printf("SUBACK expected!\n");
mqtt_demo_close_socket(&mqtt_broker);
return -2;
}
msg_id_rcv = mqtt_parse_msg_id(pcaket_buffer);
if(msg_id != msg_id_rcv)
{
printf("%d message id was expected, but %d message id was found!\n", msg_id, msg_id_rcv);
mqtt_demo_close_socket(&mqtt_broker);
return -3;
}
return 1;
}
static int mqtt_demo_loop(void)
{
int packet_length = 0;
int counter = 0;
int ret;
char* payload = "Hello HarmonyOS!";
char* msg;
char on[]="ON";
char off[]="OFF";
int payloadlen = strlen(payload);
counter++;
packet_length = mqtt_demo_read_packet(0, 1);
if(packet_length > 0)
{
if (MQTTParseMessageType(pcaket_buffer) == MQTT_MSG_PUBLISH)
{
uint8_t topic[255];
uint16_t len;
len = mqtt_parse_pub_topic(pcaket_buffer, topic);
topic[len] = '\0'; // for printf
len = mqtt_parse_publish_msg(pcaket_buffer,&msg);
msg[len] = '\0'; // for printf
printf("recvd: %s >>> %s\n",topic,msg);
if(strcmp(msg,on)==0){
GpioSetOutputVal(WIFI_IOT_GPIO_PB_08, WIFI_IOT_GPIO_VALUE0);//打开LED8灯
}
else if(strcmp(msg,off)==0){
GpioSetOutputVal(WIFI_IOT_GPIO_PB_08, WIFI_IOT_GPIO_VALUE1);//关闭LED8灯
}
}
}
ret=mqtt_publish(&mqtt_broker, (const char *)MQTT_DEMO_RX_PUB_TOPIC, (const char *)payload,payloadlen,0);//每一秒发布一次消息
if(ret<=0)
{
printf("Publish Failed!\n");
}
osDelay(500);
}
void Mqtt_test(void){
printf("[MQTT]Start MQTT\r\n");
if(mqtt_demo_init()==1){
while (1)
{
mqtt_demo_loop();
}
}
}
static void MQTT_DemoTask(void)
{
WifiDeviceConfig config = {0};
strcpy(config.ssid, PARAM_HOTSPOT_SSID);
strcpy(config.preSharedKey, PARAM_HOTSPOT_PSK);
config.securityType = PARAM_HOTSPOT_TYPE;
int netId = ConnectToHotspot(&config);//连接WIFI
int timeout = 10;
while (timeout--) {
printf("After %d seconds, I will start test!\r\n", timeout);
osDelay(100);
}
osDelay(500);
Mqtt_test();
}
static void MQTT_Demo(void)
{
osThreadAttr_t attr;
GpioInit();
GpioSetDir(WIFI_IOT_GPIO_PB_08, WIFI_IOT_GPIO_DIR_OUTPUT);
attr.name = "MQTT_DemoTask";
attr.attr_bits = 0U;
attr.cb_mem = NULL;
attr.cb_size = 0U;
attr.stack_mem = NULL;
attr.stack_size = 4096;
attr.priority = osPriorityNormal;
if (osThreadNew((osThreadFunc_t)MQTT_DemoTask, NULL, &attr) == NULL) {
printf("[MQTT_Demo] Falied to create MQTT_DemoTask!\n");
}
}
APP_FEATURE_INIT(MQTT_Demo);
BUILD.gn
static_library("mqtt_sample") {
sources = [
"mqtt_sample1.c",
]
cflags = [ "-Wno-unused-variable" ]
cflags += [ "-Wno-unused-but-set-variable" ]
include_dirs = [
"//utils/native/lite/include",
"//kernel/liteos_m/components/cmsis/2.0",
"//base/iot_hardware/interfaces/kits/wifiiot_lite",
"//foundation/communication/interfaces/kits/wifi_lite/wifiservice",
]
if (board_name == "w800" || board_name == "hi3861v100") {
sources += ["wifi_connecter.c",]
}
if (board_name == "w800") {
include_dirs += [
"//vendor/winnermicro/w800/src/network/lwip2.0.3/include/",
"//vendor/winnermicro/w800/src/app/mqtt",
"//vendor/winnermicro/w800/include/arch/xt804/csi_core",
"//vendor/winnermicro/w800/include/arch/xt804",
"//vendor/winnermicro/w800/include/platform",
"//vendor/winnermicro/w800/include/os",
"//vendor/winnermicro/w800/include/net",
"//vendor/winnermicro/w800/include/app",
"//vendor/winnermicro/w800/include/wifi",
"//vendor/winnermicro/w800/include",
]
}
}
修改wifi_connecter.h
#define PARAM_HOTSPOT_SSID "XXXXXX" // your AP SSID
#define PARAM_HOTSPOT_PSK "XXXXXX" // your AP PSK
效果如下:
程序中一秒发布一次:
订阅主题收到消息:
先这样吧!后续把上云搞出来..................................
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mqtt_sample.rar 6.82K 72次下载
已于2021-5-7 18:27:39修改
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楼主,最后一张图看不到呀