第一步：由于ROM的空间不够，先要将控制台程序移出编译
- 将源码中的device\xradio\xr806\BUILD.gn文件中44行的"adapter/console:app_console"注释掉
if (IsBootloader == "false") {
deps += [
"adapter/hals:adapter",
#"adapter/console:app_console",
"ohosdemo:ohosdemo"
]
}
- 否则编译时可能会出现如下报错信息
[OHOS ERROR] /opt/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-objcopy -O binary -R .xip audio_demo.elf audio_demo.bin
[OHOS ERROR] /opt/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-size audio_demo.elf
[OHOS ERROR] text data bss dec hex filename
[OHOS ERROR] 1155588 8032 76280 1239900 12eb5c audio_demo.elf
[OHOS ERROR] /opt/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-objcopy -O binary -j .xip audio_demo.elf audio_demo_xip.bin
[OHOS ERROR] cp audio_demo_xip.bin ../image/"xr806"/app_xip.bin
[OHOS ERROR] cd ../image/"xr806" && \
[OHOS ERROR] chmod a+r *.bin && \
[OHOS ERROR] /opt/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-gcc -E -P -CC -DCONFIG_CHIP_ARCH_VER=3 -DCONFIG_ARCH_APP_CORE -DCONFIG_CPU_CM33F -DPRJ_XIP_SIZE=8M -DPRJ_BOOT_CERT="\"null\"" -DPRJ_IMAGE_BOOT_ATTR="\"0x1\"" -DPRJ_IMAGE_APP_SRAM_OFFS="\"0x00201000\"" -DPRJ_IMAGE_APP_EP="\"0x00201101\"" -DPRJ_IMAGE_BOOT_SRAM_OFFS="\"0x00230000\"" -DPRJ_IMAGE_BOOT_EP="\"0x00230101\"" -DPRJ_IMAGE_TZ_ATTR="\"0x25\"" -DPRJ_IMAGE_TZ_XIP_ATTR="\"0x26\"" -DPRJ_IMAGE_TZ_PSRAM_ATTR="\"0x25\"" -DPRJ_APP_BIN_CERT="\"null\"" -DPRJ_APP_XIP_BIN_CERT="\"null\"" -DPRJ_APP_PSRAM_BIN_CERT="\"null\"" -DPRJ_IMAGE_APP_ATTR="\"0x1\"" -DPRJ_IMAGE_APP_XIP_ATTR="\"0x2\"" -DPRJ_IMAGE_APP_PSRAM_ATTR="\"0x1\"" -DCONFIG_RAM_START=0x00201000 -DPRJ_RAM_SIZE=300K -DPRJ_PSRAM_START_OFFS="\"0x01400000\"" -DCONFIG_PSRAM_START=0x01400000 -DPRJ_PSRAM_SIZE=0K -DPRJ_IMAGE_BOOT_BIN="\"boot_"40"M.bin\"" -DPRJ_IMAGE_SYS_SDD_BIN="\"sys_sdd_"40"M.bin\"" -I../../../../../include/generated -include autoconf.h -o .image.cfg - < image.cfg && \
[OHOS ERROR] true && \
[OHOS ERROR] chmod 777 ../../../../../tools/mkimage && ../../../../../tools/mkimage -c .image.cfg -o xr_system.img
[OHOS ERROR] err: bin 1 and bin 2 were overlaped!
[OHOS ERROR] Overlapped size: 4096 Byte(4kB)
[OHOS ERROR] bin 1 name:app.bin begin: 0x00008000 end: 0x00018C00
[OHOS ERROR] bin 2 name:app_xip.bin begin: 0x00017C00
[OHOS ERROR]
[OHOS ERROR] We've rearranged bin files and generated new cfg file 'image_auto_cal.cfg', the new one is recommended.
[OHOS ERROR] Generate image file failed
[OHOS ERROR] cfg string:
[OHOS ERROR] /*
[OHOS ERROR] *
[OHOS ERROR] * Automatically generated file; DO NOT EDIT.
[OHOS ERROR] * XR806 SDK Configuration
[OHOS ERROR] *
[OHOS ERROR] */
[OHOS ERROR] {
[OHOS ERROR] "magic" : "AWIH",
[OHOS ERROR] "version" : "0.5",
[OHOS ERROR] "image" : {"max_size": "1532K"},
[OHOS ERROR] "section" :[
[OHOS ERROR] {"id": "0xa5ff5a00", "bin" :"boot_40M.bin", "cert": "null", "flash_offs": "0K", "sram_offs": "0x00230000", "ep": "0x00230101", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5fe5a01", "bin" :"app.bin", "cert": "null", "flash_offs": "32K", "sram_offs": "0x00201000", "ep": "0x00201101", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5fd5a02", "bin" :"app_xip.bin", "cert": "null", "flash_offs": "95K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x2"},
[OHOS ERROR] {"id": "0xa5fa5a05", "bin" :"wlan_bl.bin", "cert": "null", "flash_offs": "1166K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5f95a06", "bin" :"wlan_fw.bin", "cert": "null", "flash_offs": "1169K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},
[OHOS ERROR] {"id": "0xa5f85a07", "bin" :"sys_sdd_40M.bin", "cert": "null", "flash_offs": "1194K", "sram_offs": "0xffffffff", "ep": "0xffffffff", "attr":"0x1"},
[OHOS ERROR] {}
[OHOS ERROR] ]
[OHOS ERROR] }
[OHOS ERROR]
[OHOS ERROR] ../../../../project/project.mk:519: recipe for target 'image' failed
[OHOS ERROR] make[2]: *** [image] Error 255
[OHOS ERROR] make[2]: Leaving directory '/home/qq1253176313/ubuntu_share/samba/openharmony/device/xradio/xr806/xr_skylark/project/demo/audio_demo/gcc'
[OHOS ERROR] ../../../../project/project.mk:493: recipe for target '__build' failed
[OHOS ERROR] make[1]: *** [__build] Error 2
[OHOS ERROR] make[1]: Leaving directory '/home/qq1253176313/ubuntu_share/samba/openharmony/device/xradio/xr806/xr_skylark/project/demo/audio_demo/gcc'
[OHOS ERROR] Makefile:164: recipe for target 'build' failed
[OHOS ERROR] make: *** [build] Error 2
[OHOS ERROR] you can check build log in /home/qq1253176313/ubuntu_share/samba/openharmony/out/xr806/wifi_skylark/build.log
[OHOS ERROR] command: "/home/qq1253176313/ubuntu_share/samba/openharmony/prebuilts/build-tools/linux-x86/bin/ninja -w dupbuild=warn -C /home/qq1253176313/ubuntu_share/samba/openharmony/out/xr806/wifi_skylark" failed
[OHOS ERROR] return code: 1
[OHOS ERROR] execution path: /home/qq1253176313/ubuntu_share/samba/openharmony
第二步 设置device\xradio\xr806\ohosdemo\BUILD.gn文件
- 新增一行"mqtt:app_mqtttest"
group("ohosdemo") {
deps = [
"mqtt:app_mqtttest",
#"LED:app_led",
#"hello_demo:app_hello",
#"iot_peripheral:app_peripheral",
#"wlan_demo:app_WlanTest",
]
}
第三步 编写源码
在device\xradio\xr806\ohosdemo\mqtt路径下创建BUILD.gn、ds18b20.c、ds18b20.h、main.c四个文件
- device\xradio\xr806\ohosdemo\mqtt\ds18b20.c
#include "ds18b20.h"
//////////////////////////////////////////////////////////////////////////////////
//本程序只供学习使用，未经作者许可，不得用于其它任何用途
//ALIENTEK miniSTM32开发板
//DS18B20驱动代码
//正点原子@ALIENTEK
//技术论坛:www.openedv.com
//修改日期:2012/9/12
//版本：V1.0
//版权所有，盗版必究。
//Copyright(C) 广州市星翼电子科技有限公司 2009-2019
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////
const GPIO_InitParam input_param = {
.driving = GPIO_DRIVING_LEVEL_1,
.mode = GPIOx_Pn_F0_INPUT,
.pull = GPIO_PULL_UP,
};
const GPIO_InitParam output_param = {
.driving = GPIO_DRIVING_LEVEL_1,
.mode = GPIOx_Pn_F1_OUTPUT,
.pull = GPIO_PULL_NONE,
};
//复位DS18B20
void DS18B20_Rst(void)
{
DS18B20_IO_OUT(); //SET PA0 OUTPUT
DS18B20_DQ_OUT_0; //拉低DQ
delay_us(750); //拉低750us
DS18B20_DQ_OUT_1; //DQ=1
delay_us(15); //15US
}
//等待DS18B20的回应
//返回1:未检测到DS18B20的存在
//返回0:存在
u8 DS18B20_Check(void)
{
u8 retry=0;
DS18B20_IO_IN();//SET PA0 INPUT
while (DS18B20_DQ_IN&&retry<200)
{
retry++;
delay_us(1);
};
if(retry>=200)return 1;
else retry=0;
while (!DS18B20_DQ_IN&&retry<240)
{
retry++;
delay_us(1);
};
if(retry>=240)return 1;
return 0;
}
//从DS18B20读取一个位
//返回值：1/0
u8 DS18B20_Read_Bit(void) // read one bit
{
u8 data;
DS18B20_IO_OUT();//SET PA0 OUTPUT
DS18B20_DQ_OUT_0;
delay_us(2);
DS18B20_DQ_OUT_1;
DS18B20_IO_IN();//SET PA0 INPUT
delay_us(12);
if(DS18B20_DQ_IN)data=1;
else data=0;
delay_us(50);
return data;
}
//从DS18B20读取一个字节
//返回值：读到的数据
u8 DS18B20_Read_Byte(void) // read one byte
{
u8 i,j,dat;
dat=0;
for (i=1;i<=8;i++)
{
j=DS18B20_Read_Bit();
dat=(j<<7)|(dat>>1);
}
return dat;
}
//写一个字节到DS18B20
//dat：要写入的字节
void DS18B20_Write_Byte(u8 dat)
{
u8 j;
u8 testb;
DS18B20_IO_OUT();//SET PA0 OUTPUT;
for (j=1;j<=8;j++)
{
testb=dat&0x01;
dat=dat>>1;
if (testb)
{
DS18B20_DQ_OUT_0;// Write 1
delay_us(2);
DS18B20_DQ_OUT_1;
delay_us(60);
}
else
{
DS18B20_DQ_OUT_0;// Write 0
delay_us(60);
DS18B20_DQ_OUT_1;
delay_us(2);
}
}
}
//开始温度转换
void DS18B20_Start(void)// ds1820 start convert
{
DS18B20_Rst();
DS18B20_Check();
DS18B20_Write_Byte(0xcc);// skip rom
DS18B20_Write_Byte(0x44);// convert
}
//初始化DS18B20的IO口 DQ 同时检测DS的存在
//返回1:不存在
//返回0:存在
u8 DS18B20_Init(void)
{
DS18B20_IO_OUT();
DS18B20_Rst();
return 0;
}
//从ds18b20得到温度值
//精度：0.1C
//返回值：温度值 （-550~1250）
short DS18B20_Get_Temp(void)
{
u8 temp;
u8 TL,TH;
short tem;
DS18B20_Start (); // ds1820 start convert
DS18B20_Rst();
DS18B20_Check();
DS18B20_Write_Byte(0xcc);// skip rom
DS18B20_Write_Byte(0xbe);// convert
TL=DS18B20_Read_Byte(); // LSB
TH=DS18B20_Read_Byte(); // MSB
if(TH>7)
{
TH=~TH;
TL=~TL;
temp=0;//温度为负
}else temp=1;//温度为正
tem=TH; //获得高八位
tem<<=8;
tem+=TL;//获得底八位
tem=(float)tem*0.625;//转换
if(temp)return tem; //返回温度值
else return -tem;
}
- device\xradio\xr806\ohosdemo\mqtt\ds18b20.h
#ifndef __DS18B20_H
#define __DS18B20_H
#include "driver/chip/hal_gpio.h"
#include "driver/chip/hal_util.h"
typedef unsigned long int u32;
typedef unsigned short int u16;
typedef unsigned char u8;
typedef long int s32;
typedef short int s16;
typedef char s8;
extern const GPIO_InitParam input_param;
extern const GPIO_InitParam output_param;
#define DS18B20_PORT GPIO_PORT_B
#define DS18B20_PIN GPIO_PIN_4
#define DS18B20_IO_IN() {HAL_GPIO_Init(DS18B20_PORT, DS18B20_PIN, &input_param);}
#define DS18B20_IO_OUT() {HAL_GPIO_Init(DS18B20_PORT, DS18B20_PIN, &output_param);}
#define delay_us HAL_UDelay
////IO操作函数
#define DS18B20_DQ_OUT_0 HAL_GPIO_WritePin(DS18B20_PORT, DS18B20_PIN, GPIO_PIN_LOW)
#define DS18B20_DQ_OUT_1 HAL_GPIO_WritePin(DS18B20_PORT, DS18B20_PIN, GPIO_PIN_HIGH)
#define DS18B20_DQ_IN HAL_GPIO_ReadPin(DS18B20_PORT, DS18B20_PIN) //数据端口 PA0
u8 DS18B20_Init(void); //初始化DS18B20
short DS18B20_Get_Temp(void); //获取温度
void DS18B20_Start(void); //开始温度转换
void DS18B20_Write_Byte(u8 dat);//写入一个字节
u8 DS18B20_Read_Byte(void); //读出一个字节
u8 DS18B20_Read_Bit(void); //读出一个位
u8 DS18B20_Check(void); //检测是否存在DS18B20
void DS18B20_Rst(void); //复位DS18B20
#endif
- device\xradio\xr806\ohosdemo\mqtt\main.c
#include <stdio.h>
#include <math.h>
#include "ohos_init.h"
#include "kernel/os/os.h"
#include <string.h>
#include "wifi_device.h"
#include "wifi_hotspot.h"
#include "common/framework/platform_init.h"
#include "net/wlan/wlan.h"
#include "common/framework/net_ctrl.h"
#include "net/mqtt/MQTTClient-C/MQTTClient.h"
#include "driver/chip/hal_gpio.h"
#include "driver/chip/hal_util.h"
#include "driver/chip/hal_util.h"
#include "ds18b20.h"
#define WIFI_DEVICE_CONNECT_AP_SSID "ZhuoTK_5F91"
#define WIFI_DEVICE_CONNECT_AP_PSK "qq1253176313"
#define MQTT_DEMO_THREAD_STACK_SIZE (8 * 1024) /* ssl need more stack */
static OS_Thread_t mqtt_demo_thread;
static OS_Thread_t g_main_thread;
static MQTTPacket_connectData mqtt_demo_connectData = MQTTPacket_connectData_initializer;
static Client mqtt_demo_client;
static Network mqtt_demo_network;
#define MQTT_DEMO_CLIENT_ID "mqt1212ad564617"
#define MQTT_DEMO_HOST_NAME "xxx.xxx.xxx.xxx" //填写自己MQTT服务器地址
#define MQTT_DEMO_PORT "1883"
#define MQTT_DEMO_USERNAME "user1"
#define MQTT_DEMO_PASSWORD "123123"
#define MQTT_DEMO_TOPIC "/topic/led"
// #define MQTT_DEMO_CLIENT_ID "1234785|securemode=2,signmethod=hmacsha1,timestamp=789|"
// #define MQTT_DEMO_HOST_NAME "iot-as-mqtt.cn-shanghai.aliyuncs.com"
// #define MQTT_DEMO_PORT "1883"
// #define MQTT_DEMO_USERNAME "xr806_senor_set0&vo84Hm3xbUj"
// #define MQTT_DEMO_PASSWORD "4f9ebb2143f01e4489133c1ea55051fbbfc4c44e"
// #define MQTT_DEMO_TOPIC "/vo84Hm3xbUj/xr806_senor_set0/data"
#define MQTT_DEMO_BUF_SIZE (2*1024)
#define WIFI_START 1
#define MQTT_DEMO_MSG_TEXT "mqtt demo test"
#define LED_PORT GPIO_PORT_A
#define LED_PIN GPIO_PIN_21
static void led_init(void)
{
GPIO_InitParam param;
param.driving = GPIO_DRIVING_LEVEL_1;
param.mode = GPIOx_Pn_F1_OUTPUT;
param.pull = GPIO_PULL_NONE;
HAL_GPIO_Init(LED_PORT, LED_PIN, ¶m);
}
static void led_ctl(uint8_t level)
{
HAL_GPIO_WritePin(LED_PORT, LED_PIN, level ? GPIO_PIN_HIGH : GPIO_PIN_LOW);
}
void wifi_scan_connect(){
if(WIFI_SUCCESS != EnableWifi()){
printf("Error:wifi enable fail!\n");
return;
}
if(WIFI_SUCCESS != Scan()){
printf("Error:wifi scan fail!\n");
}
printf("WIFI SCAN STARTED!\n");
OS_Sleep(3);
WifiScanInfo scan_result[30];
unsigned int scan_num = 30;
if(WIFI_SUCCESS != GetScanInfoList(scan_result, &scan_num)){
printf("Error: get scan result fail!\n");
return;
}
printf("Scan successful,you've got:\n");
for(int i = 0;i < scan_num;i++){
printf("SSID: %s ",scan_result[i].ssid);
printf("RSSI: %d",scan_result[i].rssi);
}
printf("Scan End \n");
const char ssid_want_connect[] = WIFI_DEVICE_CONNECT_AP_SSID;
const char psk[] = WIFI_DEVICE_CONNECT_AP_PSK;
printf("Connecting...");
if(WIFI_STA_ACTIVE == IsWifiActive()){
printf("Wifi is active.\n");
}
OS_Sleep(1);
WifiDeviceConfig config = {0};
int netId = 0;
int i;
for(i = 0;i < scan_num;i++){
if(0 == strcmp(scan_result[i].ssid, ssid_want_connect)){
memcpy(config.ssid, scan_result[i].ssid, WIFI_MAX_SSID_LEN);
memcpy(config.bssid, scan_result[i].bssid, WIFI_MAC_LEN);
strcpy(config.preSharedKey, psk);
config.securityType = scan_result[i].securityType;
config.wapiPskType = WIFI_PSK_TYPE_ASCII;
config.freq = scan_result[i].frequency;
break;
}
}
if(i >= scan_num){
printf("Error: No SSID SET FOUND!\n");
return;
}
printf("Found Correct SSID in Scan List!\n");
if(WIFI_SUCCESS != AddDeviceConfig(&config, &netId)){
printf("Error: Add Device config failed!\n");
return;
}
printf("Add Device Config successful!\n");
if(WIFI_SUCCESS != ConnectTo(netId)){
printf("Error: Connect to Wifi FAILED!\n");
return;
}
printf("Connect to %s successful!\n",config.ssid);
OS_Sleep(3);
}
static int mqtt_demo_init(void)
{
char *send_buf;
char *recv_buf;
/* init client id */
mqtt_demo_connectData.clientID.cstring = MQTT_DEMO_CLIENT_ID;
/* init keep alive interval */
mqtt_demo_connectData.keepAliveInterval = 30; // 30s
/* enable session reuse */
mqtt_demo_connectData.cleansession = 0;
/* set mqtt version */
mqtt_demo_connectData.MQTTVersion = 4; //Version of MQTT 3.1.1
/* send/recv buffer must free when mqtt deinit */
send_buf = malloc(MQTT_DEMO_BUF_SIZE);
if (send_buf == NULL) {
printf("no memory\n");
return -1;
}
recv_buf = malloc(MQTT_DEMO_BUF_SIZE);
if (recv_buf == NULL) {
free(send_buf);
printf("no memory\n");
return -1;
}
/* init network */
NewNetwork(&mqtt_demo_network);
/* init mqtt client object */
MQTTClient(&mqtt_demo_client, &mqtt_demo_network, 6000,
(unsigned char *)send_buf, MQTT_DEMO_BUF_SIZE,
(unsigned char *)recv_buf, MQTT_DEMO_BUF_SIZE);
/**
* set will function, when this client disconnect,
* server will sent the message to every client in MQTT_DEMO_TOPIC
*/
mqtt_demo_connectData.willFlag = 1;
mqtt_demo_connectData.will.topicName.cstring = MQTT_DEMO_TOPIC;
mqtt_demo_connectData.will.message.cstring = "I am disconnected";
mqtt_demo_connectData.will.retained = 0;
mqtt_demo_connectData.will.qos = 0;
/* set username and password */
mqtt_demo_connectData.username.cstring = MQTT_DEMO_USERNAME;
mqtt_demo_connectData.password.cstring = MQTT_DEMO_PASSWORD;
return 0;
}
static int mqtt_demo_connect(char *host_name, char *host_port)
{
int ret = -1;
/* need connect the server in tcp level first, if use ssl, use TLSConnectNetwork() */
ret = ConnectNetwork(&mqtt_demo_network, host_name, atoi(host_port));
if (ret != 0) {
printf("mqtt connect faild, ret:%d, host:%s, port:%s\n", ret, host_name, host_port);
goto exit;
}
/* if tcp level connected, then connect mqtt level */
ret = MQTTConnect(&mqtt_demo_client, &mqtt_demo_connectData);
if (ret != 0) {
printf("mqtt connect faild, ret:%d\n", ret);
/* disconnect the tcp level */
mqtt_demo_network.disconnect(&mqtt_demo_network);
goto exit;
}
printf("mqtt connected\n");
exit:
return ret;
}
static void mqtt_demo_msg_cb(MessageData *data)
{
char topic_buf[20]={0};
char payload_buf[20]={0};
memcpy(topic_buf, data->topicName->lenstring.data, data->topicName->lenstring.len);
memcpy(payload_buf,(char *)data->message->payload, data->message->payloadlen);
printf("get a message, topic: %s, msg: %s\n", topic_buf, payload_buf);
if(strcmp(topic_buf,"/topic/led") == 0){
if(strcmp((char *)payload_buf,"led8 on") == 0){
led_ctl(1);
printf("led1 on\r\n");
}
else if(strcmp((char *)payload_buf,"led8 off") == 0){
led_ctl(0);
printf("led1 off\r\n");
}
}
}
static int mqtt_demo_subscribe(char *topic)
{
int ret = -1;
if (mqtt_demo_client.isconnected) {
/* set the message callback */
ret = MQTTSubscribe(&mqtt_demo_client, topic, 0, mqtt_demo_msg_cb);
if (ret != 0)
printf("mqtt subscribe faild ret:%d\n", ret);
}
return ret;
}
static int mqtt_demo_unsubscribe(char *topic)
{
int ret = -1;
if (mqtt_demo_client.isconnected) {
ret = MQTTUnsubscribe(&mqtt_demo_client, topic);
if (ret != 0)
printf("mqtt unsubscribe faild, ret:%d\n", ret);
}
return ret;
}
static int mqtt_demo_publish(char *topic, char *msg)
{
int ret = -1;
MQTTMessage message;
memset(&message, 0, sizeof(message));
message.qos = 0;
message.retained = 0; /* disable retain the message in server */
message.payload = msg;
message.payloadlen = strlen(msg);
ret = MQTTPublish(&mqtt_demo_client, topic, &message);
if (ret != 0)
printf("mqtt publish faild, ret:%d\n", ret);
return ret;
}
static int mqtt_demo_disconnect(void)
{
int ret = -1;
if (mqtt_demo_client.isconnected) {
/* need disconnect mqtt level first */
ret = MQTTDisconnect(&mqtt_demo_client);
if (ret != 0)
printf("mqtt disconnect fail, ret:%d\n", ret);
/* then disconnect tcp level */
mqtt_demo_network.disconnect(&mqtt_demo_network);
}
return ret;
}
static void mqtt_demo_deinit(void)
{
if (mqtt_demo_client.buf) {
free(mqtt_demo_client.buf);
mqtt_demo_client.buf = NULL;
}
if (mqtt_demo_client.readbuf) {
free(mqtt_demo_client.readbuf);
mqtt_demo_client.readbuf = NULL;
}
}
static void mqtt_demo_fun(void *arg)
{
// uint8_t level = 1;
int ret;
int reconnect_times = 0;
short int int_temp=0;
char temp_buf[10]={0};
led_init();
DS18B20_Init(); //初始化DS18B20
wifi_scan_connect();
/* mqtt init */
mqtt_demo_init();
/* mqtt connect */
re:
ret = mqtt_demo_connect(MQTT_DEMO_HOST_NAME, MQTT_DEMO_PORT);
if (ret != 0)
{
OS_MSleep(500);
goto re;
}
/* subscribe topic */
ret = mqtt_demo_subscribe(MQTT_DEMO_TOPIC);
if (ret != 0)
goto exit;
while (1) {
int_temp = DS18B20_Get_Temp();
sprintf(temp_buf,"%d.%d",int_temp/10, abs(int_temp%10));
printf("temp:%s\r\n", temp_buf);
/* publish message to topic */
mqtt_demo_publish("/topic/temp", temp_buf);
ret = MQTTYield(&mqtt_demo_client, 300);
if (ret != 0) {
printf("mqtt yield err, ret:%d\n", ret);
reconnect:
printf("mqtt reconnect\n");
mqtt_demo_disconnect();
ret = mqtt_demo_connect(MQTT_DEMO_HOST_NAME, MQTT_DEMO_PORT);
if (ret != 0) {
reconnect_times++;
if (reconnect_times > 5)
goto exit;
OS_MSleep(5000); //5s
goto reconnect;
}
}
// level = (!level & 0x01);
// led_ctl(level);
OS_MSleep(1000); //1s
}
exit:
mqtt_demo_unsubscribe(MQTT_DEMO_TOPIC);
mqtt_demo_disconnect();
mqtt_demo_deinit();
OS_ThreadDelete(&mqtt_demo_thread);
}
int mqtt_entry(void)
{
if (OS_ThreadCreate(&mqtt_demo_thread, "mqtt_demo_thread", mqtt_demo_fun, NULL,
OS_THREAD_PRIO_APP,
8 * 1024) != OS_OK) {
printf("[ERR] Create MainThread Failed\n");
}
}
SYS_RUN(mqtt_entry);
- device\xradio\xr806\ohosdemo\mqtt\BUILD.gn；
import("//device/xradio/xr806/liteos_m/config.gni") #必须，config中定义了头文件路径和关键宏定义
static_library("app_mqtttest") { #必须，所有应用工程必须是app_打头
configs = []
sources = [
"main.c",
"ds18b20.c",
]
cflags = board_cflags #必须，board_cflags是在config.gni中定义的关键宏定义
include_dirs = board_include_dirs #必须，board_include_dirs是在config.gni中定义的文件路径
include_dirs += [
"//foundation/communication/wifi_lite/interfaces/wifiservice",
".",
"//utils/native/lite/include",
"//device/xradio/xr806/xr_skylark/include/net/mqtt/MQTTClient-C",
"//device/xradio/xr806/xr_skylark/project",
"//kernel/liteos_m/kernel/arch/include",
"//base/iot_hardware/peripheral/interfaces/kits",
]
}
第四步 编译下载
- 编译：hb build -f命令开始编译
- 烧写程序：在下载器设置里勾选下载后重启（由于注释掉了控制台，所以没复位功能了，复位需要拔掉电源线）
第五步 验证效果
1.打开串口助手，每秒会输出一次温度
2. 在电脑上打开MQTT.fx软件连接上对应的MQTT服务器，并阅订“/topic/temp”主题，每秒会接收到一次开发板传来的温度
3. 在电脑上打开MQTT.fx软件连接上对应的MQTT服务器发布“/topic/led”主题,内容“led8 on”,就可以远程打开开发板上的LED，发布“led8 off”就可以关开发板上的LED
