CIS/src/main/java/com/welampiot/utils/lamp/WeLamp4G.java

package com.welampiot.utils.lamp;

import com.welampiot.utils.ToolUtils;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * 4G 控制器工具类
 */
@Component
public class WeLamp4G {

    public static String transIn = "/Lamp/TransIn/";
    public static String transOut = "/Lamp/TransOut/";
    /**
     * 灯控调光
     * @param address 灯控地址
     * @param light 亮度值 0-100
     * @param mode 通道值 0 A灯，1 B灯
     * @return
     */
    public static boolean dimming(String address,Integer light,Integer mode){
        String sendTopic = transIn+address;
        String backTopic = transOut+address;
        String cmd;
        if (mode == 0){  // A 路
            cmd = "0106DF0A";
        }else {  // B 路
            cmd = "0106DF0C";
        }
        String lightStr = "0000"+Integer.toHexString(light).toString();
        lightStr = lightStr.substring(-4);
        cmd += lightStr;
        cmd += getCRC(cmd.getBytes());
        String s = ToolUtils.sendMqttCmdInfo(sendTopic, "0232"+cmd, backTopic);
        if (s.isEmpty()){
            return false;
        }else {
            return true;
        }
    }
    /**
     * 计算modbus CRC16校验码
     * @param bytes 需要计算的数据
     * @return
     */
    public static String getCRC(byte[] bytes) {
        // CRC寄存器全为1
        int CRC = 0x0000ffff;
        // 多项式校验值
        int POLYNOMIAL = 0x0000a001;
        int i, j;
        for (i = 0; i < bytes.length; i++) {
            CRC ^= ((int) bytes[i] & 0x000000ff);
            for (j = 0; j < 8; j++) {
                if ((CRC & 0x00000001) != 0) {
                    CRC >>= 1;
                    CRC ^= POLYNOMIAL;
                } else {
                    CRC >>= 1;
                }
            }
        }
        // 结果转换为16进制
        String result = Integer.toHexString(CRC).toUpperCase();
        if (result.length() != 4) {
            StringBuffer sb = new StringBuffer("0000");
            result = sb.replace(4 - result.length(), 4, result).toString();
        }
        //高位在前地位在后
        //return result.substring(2, 4) + " " + result.substring(0, 2);
        // 交换高低位，低位在前高位在后
        return result.substring(2, 4)+result.substring(0, 2);
    }
}