1、实验背景

随着城市的快速发展和城市化进程的加快,伴随而来的环境、社会、交通问题也日益严重。利用先进的信息技术构建智慧城市成为解决城市问题的重要途径。作为智慧城市重要的组成部分,智慧园区的建设尤为重要。

2、实验目标

1.采集温度、湿度、光照、气压值，并由OneNET平台订阅；
2.光照高于设定值，LED灯亮；光照低于设定值，LED灯灭
3.轻应用展示温度、湿度、光照、气压值。
4.可视化展示温度、湿度、光照、气压值。

3、实验步骤

3.1平台控制
添加新的对象

nbiot_value_t press;   /* 气压*/
nbiot_value_t led;    /* LED灯*/

extern float result_lx;
extern _bmp180 bmp180;

编写写回调函数

void write_callback(
        uint16_t       objid,
        uint16_t       instid,
        uint16_t       resid,
        nbiot_value_t *data)
{
    printf("write /%d/%d/%d：%d\r\n",
            objid,
            instid,
            resid, data->value.as_bool);
    if((objid == 3311) && (instid == 0) && (resid == 5850))
{
Led1_Set(data->value.as_bool);
}
}

编写读回调函数

void read_callback(
        uint16_t       objid,
        uint16_t       instid,
        uint16_t       resid,
        nbiot_value_t *data)
{
    if (objid == 3303 && instid == 0 && resid == 5700) {
        SHT20_INFO sht20 = { 0 };
        sht20 = SHT20_GetValue();
        temp.value.as_float = (int64_t)sht20.tempreture;
    } else if (objid == 3304 && instid == 0 && resid == 5700) {
        SHT20_INFO sht20 = { 0 };
        sht20 = SHT20_GetValue();
        humi.value.as_float = (int64_t)sht20.humidity;
    } else if (objid == 3301 && instid == 0 && resid == 5700) {
            BH1750_test();
            illumi.value.as_float=result_lx;
        } else if (objid == 3323 && instid == 0 && resid == 5700) {
            BMP180_test();
            press.value.as_float=bmp180.p;
        }
}

添加资源

void res_update(time_t interval)
{
    SHT20_INFO sht20;
    if (cur_time >= last_time + interval) {
        cur_time = 0;
        last_time = 0;

        temp.flag |= NBIOT_UPDATED;
        humi.flag |= NBIOT_UPDATED;
        sht20 = SHT20_GetValue();
        temp.value.as_float = ((float)((int)((sht20.tempreture + 0.05) * 100)) / 100);
        humi.value.as_float = sht20.humidity;

            illumi.flag|=NBIOT_UPDATED;
            BH1750_test();
            illumi.value.as_float=result_lx;

            press.flag|=NBIOT_UPDATED;
            BMP180_test();
            press.value.as_float=bmp180.p;

            led.flag|=NBIOT_UPDATED;
            led.value.as_bool=ledStatus.Led1Sta;

    } else if (cur_time == 0 && last_time == 0) {
        cur_time = nbiot_time();
        last_time = cur_time;
    } else {
        cur_time = nbiot_time();
    }
}

// 添加光照资源
    illumi.type = NBIOT_FLOAT;
    illumi.flag = NBIOT_READABLE;
    ret = nbiot_resource_add(dev,
            3301,
            0,
            5700,
            &illumi);
    if (ret)
    {
        nbiot_device_destroy(dev);
        printf("device add resource(illumi) failed, code = %d.\r\n", ret);
    }   

    // 添加气压资源
    press.type = NBIOT_FLOAT;
    press.flag = NBIOT_READABLE;
    ret = nbiot_resource_add(dev,
            3323,   /* objId */
            0,      /* instId */
            5700,   /* resId */
            &press);
    if (ret)
    {
        nbiot_device_destroy(dev);
        printf("device add resource(press) failed, code = %d.\r\n", ret);
    }

            // 添加led灯资源
    led.type = NBIOT_BOOLEAN;
        led.flag = NBIOT_READABLE|NBIOT_WRITABLE;
    ret = nbiot_resource_add(dev,
            3311,   /* objId */
            0,      /* instId */
            5850,   /* resId */
            &led);
    if (ret)
    {
        nbiot_device_destroy(dev);
        printf("device add resource(led) failed, code = %d.\r\n", ret);
    }

代码编写完之后，终端固件烧写运行。

进入OneNET平台，设备上线后可以看到已经有五个资源

打开Light Control资源，通过写的操作，输入true，LED灯亮着

3.2光照值控制
为设备添加触发器
在光照值高于60时Led灯灭

在光照值低于50时亮灯

3.3Postman控制
调用API返回温度值和资源ID

image

返回值

{
    "errno": 0,
    "data": {
        "count": 5,
        "datastreams": [
            {
                "datapoints": [
                    {
                        "at": "2021-06-08 16:16:38.236",
                        "value": 30.870001
                    }
                ],
                "id": "3303_0_5700"
            },
            {
                "datapoints": [
                    {
                        "at": "2021-06-08 16:16:38.236",
                        "value": 57.674973
                    }
                ],
                "id": "3304_0_5700"
            },
            {
                "datapoints": [
                    {
                        "at": "2021-06-08 16:16:38.026",
                        "value": 121.666664
                    }
                ],
                "id": "3301_0_5700"
            },
            {
                "datapoints": [
                    {
                        "at": "2021-06-08 16:16:38.555",
                        "value": 98022
                    }
                ],
                "id": "3323_0_5700"
            },
            {
                "datapoints": [
                    {
                        "at": "2021-06-08 16:16:38.252",
                        "value": false
                    }
                ],
                "id": "3311_0_5850"
            }
        ]
    },
    "error": "succ"
}

使用Postman发送请求，向终端设备写入资源
资源参数