package com.ld.igds.protocol.es.dlt645.builder;
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import com.ld.igds.protocol.es.dlt645.util.Dlt645Utils;
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/**
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* 电表命令生成
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*
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* @author czt
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*/
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public class CommandBuild {
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private final static CommandBuild instance = new CommandBuild();
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private CommandBuild() {
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}
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public static CommandBuild getInstance() {
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return instance;
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}
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/**
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* 能耗采集命令
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*
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* @param esAddr 电表地址
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* @return
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*/
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public static String getMsgCheck(String esAddr) {
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//获取命令
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StringBuffer sb = new StringBuffer();
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//帧起始符
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sb.append("68");
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//地域域，反向拼接
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sb.append(Dlt645Utils.addrToString(esAddr));
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//帧起始符
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sb.append("68");
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//控制码及
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sb.append("11");
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//数据域长度
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sb.append("04");
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//数据域
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sb.append("33333433");
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//校验码
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String checkNum = Dlt645Utils.makeCheck(sb.toString());
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sb.append(checkNum);
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StringBuffer sb0 = new StringBuffer();
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//起始符
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sb0.append(Dlt645Utils.MSG_START);
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sb0.append(sb);
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//结尾符
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sb0.append(Dlt645Utils.MSG_END);
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return sb0.toString();
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}
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}
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