1膜毁、實驗背景

隨著城市的快速發(fā)展和城市化進程的加快,伴隨而來的環(huán)境窥浪、社會镊逝、交通問題也日益嚴重物臂。利用先進的信息技術構(gòu)建智慧城市成為解決城市問題的重要途徑旺拉。作為智慧城市重要的組成部分,智慧園區(qū)的建設尤為重要。

2棵磷、實驗目標

1.采集溫度蛾狗、濕度、光照仪媒、氣壓值沉桌，并由OneNET平臺訂閱；
2.光照高于設定值算吩，LED燈亮留凭；光照低于設定值，LED燈滅
3.輕應用展示溫度偎巢、濕度蔼夜、光照、氣壓值压昼。
4.可視化展示溫度挎扰、濕度、光照巢音、氣壓值遵倦。

3、實驗步驟

3.1平臺控制
添加新的對象

nbiot_value_t press;   /* 氣壓*/
nbiot_value_t led;    /* LED燈*/

extern float result_lx;
extern _bmp180 bmp180;

編寫寫回調(diào)函數(shù)

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);
}
}

編寫讀回調(diào)函數(shù)

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;
        }
}

添加資源

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();
    }
}

// 添加光照資源
    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);
    }   

    // 添加氣壓資源
    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燈資源
    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);
    }

代碼編寫完之后官撼，終端固件燒寫運行梧躺。

進入OneNET平臺，設備上線后可以看到已經(jīng)有五個資源

打開Light Control資源，通過寫的操作掠哥，輸入true巩踏，LED燈亮著

3.2光照值控制
為設備添加觸發(fā)器
在光照值高于60時Led燈滅

在光照值低于50時亮燈

3.3Postman控制
調(diào)用API返回溫度值和資源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發(fā)送請求，向終端設備寫入資源
資源參數(shù)

image

image

寫入（其中輸入1续搀，表示亮燈塞琼，0表示關燈）

image

3.4輕應用

1.png

4、總結(jié)

本次實驗步驟比較繁瑣但是比較簡單禁舷，需要耐心彪杉。遇到問題時要多與同學討論！