android硬件diy Android硬件通信

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kekenai 2023-07-04 23:53:47

文章标签 android硬件diy Android硬件通讯 ide App 串口通讯 文章分类 Android 移动开发

前言

如果你开发的App需要与硬件做通讯，获取相应数据进行业务处理，这个库肯定对你有帮助。常见的硬件通讯连接方式有：串口通讯、Usb Com、Usb、蓝牙（包括BLE）、Wifi等，实际硬件支持哪种连接方式，要看硬件支持哪种方式。应用层硬件通讯方案有两种：

硬件供应商有提供SDK,不需要关注连接通讯实现，直接集成到App中使用即可
硬件供应商没有提供SDK，单提供有通讯协议，这时候自己需要分析协议流程和写通讯代码

本文针对第二点，封装了一个基础的、轻量级的通讯库，支持多种连接方式串口通讯、Usb Com、Usb、蓝牙（包括BLE）、Wifi，通讯流程为：

1. 初始化连接实例
2. 打开连接
3. 读写数据
4. 关闭连接

通讯库特点：上层调用一致，底层不同实现，方便使用者切换连接方式。为简化上层调用和方便数据处理，全部连接采用同步操作，即一发一收（一问一答）的方式通讯

调用

1.初始化实例

//串口
BaseConnectProvider baseConnectProvider = new SerialPortConnectProvider(SerialPortConfig serialPortConfig);

//Usb Com
BaseConnectProvider baseConnectProvider = new UsbComConnectProvider(int vendorId, int productId, SerialPortConfig serialPortConfig);
//or
BaseConnectProvider baseConnectProvider = new UsbComConnectProvider(UsbDevice usbDevice, SerialPortConfig serialPortConfig);

//Usb
BaseConnectProvider baseConnectProvider = new UsbConnectProvider(int vendorId, int productId);
//or
BaseConnectProvider baseConnectProvider = new UsbConnectProvider(UsbDevice usbDevice);

//默认蓝牙 Com
BaseConnectProvider baseConnectProvider = new BluetoothConnectProvider(BluetoothDevice bluetoothDevice);
BaseConnectProvider baseConnectProvider = new BluetoothConnectProvider(String address);
//指定蓝牙服务UUID
BaseConnectProvider baseConnectProvider = new BluetoothConnectProvider(BluetoothDevice bluetoothDevice, String uuid);
BaseConnectProvider baseConnectProvider = new BluetoothConnectProvider(String address, String uuid);

//Wifi
BaseConnectProvider baseConnectProvider = new WifiConnectProvider(String host, int port, int connectTimeout, int readTimeout);

//特别地：蓝牙Ble
BluetoothLeConnectProvider connectProvider = new BluetoothLeConnectProvider(BluetoothDevice bluetoothDevice);
BluetoothLeConnectProvider connectProvider = new BluetoothLeConnectProvider(String address);

2.打开连接

baseConnectProvider.open();

3.写和读数据

baseConnectProvider.read(byte[] sendParams, byte[] buffer, int timeout);

3.1 蓝牙Ble通讯

蓝牙Ble,与其它连接方式不好统一，故做特殊处理

//特征写请求,其它请求创建不同的实例发送即可
CharacteristicWriteRequest bluetoothLeRequest = new CharacteristicWriteRequest();
bluetoothLeRequest.setService(UUID_SERVICE);
bluetoothLeRequest.setCharacter(UUID_CHARACTER_WRITE);
bluetoothLeRequest.setBytes(sendData);
BluetoothLeResponse response = new BluetoothLeResponse();
bluetoothLeRequest.sendRequest(bluetoothLeRequest,response,5*1000);

//蓝牙ble监听服务端(也叫从机/外围设备/peripheral)数据，分两步操作

//1.监听通知信息
 bluetoothLeConnectProvider.setBluetoothLeNotifyListener(new BluetoothLeNotifyListener() {
                        @Override
                        public void onNotify(UUID serviceId, UUID characterId, byte[] value) {
                            
                        }
                    });
//2.开启通知
NotifyRequest notifyRequest = new NotifyRequest();
notifyRequest.setService(UUID_SERVICE);
notifyRequest.setCharacter(UUID_CHARACTER_READ);
notifyRequest.setEnable(true);
BluetoothLeResponse response = new BluetoothLeResponse();
bluetoothLeConnectProvider.sendRequest(notifyRequest,response,5*1000);

4.关闭连接