How to convert hex representation of ipv4 back to string?

[josh208]

Does anyone have sample code for converting hex ipv4 address back to string?

[kenrok1]

like this? Hex to IP Converter - Convert Hexadecimal to IP - Online - Browserling Web Developer Tools

[josh208]

Thanks, but I'm looking for groovy code to do this.

[sburke781]

You could try looking at some of the methods at the end of this copy of my driver...

https://raw.githubusercontent.com/sburke781/hubitat/kumoLocalControl/UnifiedThermostat/UnifiedThermostatUnitChild_Driver.groovy

[thebearmay]

def hex2IP(hexStr) {
    ipStr=""
    for(i=0;i<hexStr.size();i=i+2){
        ipStr+="${hubitat.helper.HexUtils.hexStringToInt(hexStr.substring(i,i+2))}."
    }
    ipStr = ipStr.substring(0,ipStr.size()-1)
    return ipStr
}

[josh208]

Thanks for this. I did figure out how to do it. Here was my solution...

public static String hex2IP(String hex)
{
    String ip= "";

    for (int j = 0; j < hex.length(); j+=2) {
        String sub = hex.substring(j, j+2);
        int num = Integer.parseInt(sub, 16);
        ip += num+".";
    }

    ip = ip.substring(0, ip.length()-1);
    return ip;
}

[Jost]

The Groovy way:

public static String hex2IP(String hex)
{
  return org.codehaus.groovy.runtime.EncodingGroovyMethods.decodeHex(hex).collect{(it < 0 ? it + 256 : it)}.join('.')
}

[josh208]

Slick!

[tomw]

@Jost

EncodingGroovyMethods

Agree, this is a really useful class that I haven't really looked at before. Thanks for the tip @Jost