Juno TH TILT mioty® Blueprint – IFM Gateway Integration 

function Decoder(bytes, port) {

    // Conversion of signed integers
    function uncomplement(val, bitwidth) {
        var isnegative = val & (1 << (bitwidth - 1));
        var boundary   = (1 << bitwidth);
        var minval     = -boundary;
        var mask       = boundary - 1;
        return isnegative ? minval + (val & mask) : val;
    }

    var decoded = {};

    if (port === 1) {

        // Attributes
        decoded.base_id         = bytes[0] >> 4;
        decoded.major_version   = bytes[0] & 0x0F;
        decoded.minor_version   = bytes[1] >> 4;
        decoded.product_version = bytes[1] & 0x0F;

        // Telemetry
        decoded.up_cnt               = bytes[2];
        decoded.battery_voltage      = ((bytes[3] << 8) | bytes[4]) / 1000.0;              
        decoded.internal_temperature = bytes[5] - 128;

        var idx = 6;

        if (decoded.product_version & 0x01) {
            decoded.operating_seconds =
                (bytes[idx++] << 24) |
                (bytes[idx++] << 16) |
                (bytes[idx++] << 8) |
                bytes[idx++];

            decoded.cycles =
                (bytes[idx++] << 24) |
                (bytes[idx++] << 16) |
                (bytes[idx++] << 8) |
                bytes[idx++];

            decoded.utilization_rate =
                ((bytes[idx++] << 8) | bytes[idx++]) / 100.0;

            decoded.is_active = bytes[idx++];
        }

        if (decoded.product_version & 0x08) {
            decoded.temperature =
                ((bytes[idx++] << 8) | bytes[idx++]) / 10 - 100;

            decoded.humidity = bytes[idx++];
        }

    } else if (port == 197) {

        var format = bytes[0];
        var offset = 1;
        var results = [];

        if (format === 0) {

            var count = Math.floor((bytes.length - offset) / 6);

            for (var i = 0; i < count; i++) {

                var macBytes = bytes.slice(
                    offset + i * 6,
                    offset + i * 6 + 6
                );

                var mac = macBytes.map(function(b) {
                    return (b < 16 ? "0" : "") +
                        b.toString(16).toUpperCase();
                }).join(":");

                results.push({ mac: mac });
            }

        } else if (format === 1) {

            var count = Math.floor((bytes.length - offset) / 7);

            for (var i = 0; i < count; i++) {

                var rssiRaw = bytes[offset + i * 7];
                var rssi = rssiRaw > 127
                    ? rssiRaw - 256
                    : rssiRaw;

                var macBytes = bytes.slice(
                    offset + i * 7 + 1,
                    offset + i * 7 + 7
                );

                var mac = macBytes.map(function(b) {
                    return (b < 16 ? "0" : "") +
                        b.toString(16).toUpperCase();
                }).join(":");

                results.push({
                    mac: mac,
                    rssi: rssi
                });
            }

        } else {
            return {
                errors: ["Unknown payload format: " + format]
            };
        }

        decoded.format = format;
        decoded.access_points = results;
    }

    return decoded;
}

1. Version History

2. Integrating Blueprint Sensors into the ifm mioty Gateway