node-red-contrib-knx-ultimate/KNXEngine/dptlib/dpt232.js

Control your KNX intallation via Node-Red! Single Node KNX IN/OUT with optional ETS group address importer. Easy to use and highly configurable.

/**
* KNXEngine - a KNX protocol stack in Javascript
* (C) 2016-2019 Supergiovane
*/

const knxLog = require('./../KnxLog');

//
// DPT232: 3-byte RGB color array
// MSB: Red, Green, LSB: Blue
//
exports.formatAPDU = function (value) {
    if (!value) {
        knxLog.get().error("DPT232: cannot write null value");
    } else {
        var apdu_data;
        if (typeof value == 'object' &&
            value.hasOwnProperty('red') && value.red >= 0 && value.red <= 255 &&
            value.hasOwnProperty('green') && value.green >= 0 && value.green <= 255 &&
            value.hasOwnProperty('blue') && value.blue >= 0 && value.blue <= 255) {
        } else {
            knxLog.get().error("DPT232: Must supply an value {red:0-255, green:0-255, blue:0-255}");
        }
        return Buffer.from([
            Math.floor(value.red),
            Math.floor(value.green),
            Math.floor(value.blue)]);
    }
}

exports.fromBuffer = function (buf) {
    if (buf.length != 3) {
        knxLog.get().error("DPT232: Buffer should be 3 byte long, got", buf.length);
        return null;
    }
    ret = { red: buf[0], green: buf[1], blue: buf[2] }
    return ret;
}


exports.basetype = {
    "bitlength": 3 * 8,
    "valuetype": "basic",
    "desc": "RGB array",
    "help":
        `// Each color in a range between 0 and 255
msg.payload={red:255, green:200, blue:30};
return msg;`,
    "helplink": "https://github.com/Supergiovane/node-red-contrib-knx-ultimate/wiki/-Sample---RGB-Color"
}

exports.subtypes = {
    "600": {
        "desc": "RGB", "name": "RGB color triplet",
        "unit": "", "scalar_range": [,],
        "range": [,]
    }
}