Integrating Android Things with Alibaba Cloud IoT

In this article, we will show you how you can connect Android Things to your Internet of Things (IoT) network easily with Alibaba Cloud IoT Platform. We will build a functional formaldehyde and temperature sensor for this project.

Hardware Devices

Project Device List

NXP i.MX7D Pins

Device Wiring Diagram

Alibaba Cloud IoT Configuration

First, navigate to the IoT console and activate Alibaba Cloud IoT. Create an advanced product and add product attribute definition:

Android Things Device Development

  • <uses-permission android:name="android.permission.INTERNET" />
  1. Add the “eclipse.paho.mqtt” repository to gradle
  • implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.0'
  1. Read DHT12 data through I2C
  • 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); } }
  1. Obtain Ze08CH2O data through UART
  • 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); }
  1. Create an Alibaba Cloud IoT connection and report the data
  • /* payload format { "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);

Real-time Data on Cloud Console

Source Code

Reference:https://www.alibabacloud.com/blog/integrating-android-things-with-alibaba-cloud-iot_594141?spm=a2c41.12267708.0.0

Follow me to keep abreast with the latest technology news, industry insights, and developer trends.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store