aliyun-iot-androidthings-nxp

谷歌Android things物联网硬件接入阿里云IoT物联网套件云端实战
我的项目代码 https://github.com/iot-blog/aliyun-iot-android-things-nxp

1.硬件设施

android things开发板 NXP Pico i.MX7D
NXP Pico i.MX7D 残缺I/O接口文档

温湿度传感器 DHT12DHT12
反对I2C，淘宝有售

甲醛传感器 ZE08-CH2O
ZE08反对UART，淘宝有售

设施接线

2.阿里云IoT物联网套件

2.1 开明阿里云IoT物联网套件

IoT物联网套件官网地址

2.2 创立高级版产品
产品属性定义

2.3 设施端开发

a) 应用Android Studio创立Android things工程，增加网络权限

<uses-permission android:name="android.permission.INTERNET" />

b) gradle引入eclipse.paho.mqtt

implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.0'

c) DHT12Thermometer通过I2C读取DHT12数据

private void readDataFromI2C() {        try {            byte[] data = new byte[5];            i2cDevice.readRegBuffer(0x00, data, data.length);            // check data            if ((data[0] + data[1] + data[2] + data[3]) % 256 != data[4]) {                humidity = temperature = 0;                return;            }            // humidity data            humidity = Double.valueOf(String.valueOf(data[0]) + "." + String.valueOf(data[1]));            Log.d(TAG, "humidity: " + humidity);            // temperature data            if (data[3] < 128) {                temperature = Double.valueOf(String.valueOf(data[2]) + "." + String.valueOf(data[3]));            } else {                temperature = Double.valueOf("-" + String.valueOf(data[2]) + "." + String.valueOf(data[3] - 128));            }            Log.d(TAG, "temperature: " + temperature);        } catch (IOException e) {            Log.e(TAG, "readDataFromI2C error " + e.getMessage(), e);        }    }

d) Ze08CH2O通过UART获取ZE08数据

try {                // data buffer                byte[] buffer = new byte[9];                while (uartDevice.read(buffer, buffer.length) > 0) {                    if (checkSum(buffer)) {                        ppbCh2o = buffer[4] * 256 + buffer[5];                        ch2o = ppbCh2o / 66.64 * 0.08;                    } else {                        ch2o = ppbCh2o = 0;                    }                    Log.d(TAG, "ch2o: " + ch2o);                }            } catch (IOException e) {                Log.e(TAG, "Ze08CH2O read data error " + e.getMessage(), e);            }

}e) 创立阿里云IoT连贯，上报数据

/*payload格局{  "id": 123243,  "params": {    "temperature": 25.6,    "humidity": 60.3,    "ch2o": 0.048  },  "method": "thing.event.property.post"}*/MqttMessage message = new MqttMessage(payload.getBytes("utf-8"));message.setQos(1);String pubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post";mqttClient.publish(pubTopic, message);

2.4 设施启动后，在阿里云IoT云端控制台查看实时数据

物联网平台产品介绍详情：https://www.aliyun.com/product/iot/iot_instc_public_cn

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