A1Device.java

/*******************************************************************************
 * MIT License
 *
 * Copyright (c) 2016, 2017 Anthony Law
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Contributors:
 *      - Anthony Law (mob41) - Initial API Implementation
 *      - bwssytems
 *      - Christian Fischer (computerlyrik)
 *******************************************************************************/
package com.github.mob41.blapi;

import java.io.IOException;
import java.net.DatagramPacket;

import static com.github.mob41.blapi.HexUtil.bytes2hex;

import com.github.mob41.blapi.mac.Mac;
import com.github.mob41.blapi.pkt.CmdPayload;
import com.github.mob41.blapi.pkt.Payload;

public class A1Device extends BLDevice {

    public A1Device(String host, Mac mac) throws IOException {
        super(BLDevice.DEV_A1, BLDevice.DESC_A1, host, mac);
    }

    public EnvData getSensorsData() throws Exception {
        DatagramPacket packet = sendCmdPkt(new CmdPayload() {

            @Override
            public byte getCommand() {
                return 0x6a;
            }

            @Override
            public Payload getPayload() {
                return new Payload() {

                    @Override
                    public byte[] getData() {
                        byte[] b = new byte[16];
                        b[0] = 1;
                        return b;
                    }

                };
            }

        });
        byte[] data = packet.getData();

        log.debug("A1 check sensors received encrypted bytes: " + bytes2hex(data));

        int err = data[0x22] | (data[0x23] << 8);

        if (err == 0) {
            byte[] pl = decryptFromDeviceMessage(data);
            log.debug("A1 check sensors received bytes (decrypted):" + bytes2hex(pl));

            float temp = (float) ((pl[0x4] * 10 + pl[0x5]) / 10.0);
            float hum = (float) ((pl[0x6] * 10 + pl[0x7]) / 10.0);
            byte light = pl[0x8];
            byte airQuality = pl[0x0a];
            byte noise = pl[0xc];
            
            return new EnvData(temp, hum, light, airQuality, noise);
        } else {
            log.warn("A1 check sensors received an error: " + Integer.toHexString(err) + " / " + err);
            return null;
        }
    }
}