node-red-contrib-symi/lib/protocols/alive/Climate.js

Node-RED nodes for smart home device communication with Home Assistant integration, supporting HassKit, Clowire, Alive, LF and complete Symi protocols

/**
 * Alive协议 - 气候控制设备处理
 * 基于Clowire协议但有细微差别
 */

const fan_modes = ["low", "medium", "high", "off", "auto"]
const ac_modes = ["cool", "heat", "fan_only", "dry", "auto"]

/**
 * 缓冲区数据转对象
 * @param {Buffer} data 命令缓冲
 * @param {object} obj 节点对象
 */
function buf2obj(data, obj) {
    const protocolData = _protocol(data)
    if (!protocolData) return null
    
    protocolData.uid = obj.entity_id
    if (obj.uid === protocolData.id)
        return protocolData
    else
        return null
}

/**
 * 协议解析 (Alive协议从第2字节开始解析)
 * @param {Buffer} data 
 */
function _protocol(data) {
    if(!data) return;
    
    let obj = {}
    obj.id = data[1] // Alive协议跳过第一个标识字节
    
    if (data[4] <= 0x39 && data[4] >= 0x23) {
        if (data[2] !== 0x06) return false
        return _handleThermostat(obj, data)
    }
    return false
}

/**
 * 温控器处理
 * @param {object} obj 
 * @param {Buffer} data 
 */
function _handleThermostat(obj, data) {
    switch (data[4]) {
        case 0x33:
            obj.type = 'fan_speed'
            obj.val = fan_modes[data[6]]
            break
        case 0x32:
            obj.type = 'mode'
            obj.val = ac_modes[data[6]]
            break
        case 0x35:
            obj.type = 'setTemperature'
            obj.val = data[6]
            break
        case 0x36:
            obj.type = 'power'
            obj.val = data[6] ? 'on' : 'off'
            break
        default:
            return null
    }
    return obj
}

/**
 * 处理气候设备状态
 * @param {Array} buf 
 * @param {object} obj 
 * @param {Array} arr 
 */
async function handleClimateState(buf, obj, arr) {
    if(!obj.attributes) {
        arr = []
        return 
    }
    
    let i = ac_modes.indexOf(obj.state)
    buf[2] = buf[4] = 0
    
    if (i >= 0) {
        buf[3] = 0x32
        buf[5] = i
        arr.push(JSON.parse(JSON.stringify(buf)))
    }
    
    i = fan_modes.indexOf(obj.attributes.fan_mode)
    if (i >= 0) {
        buf[3] = 0x33
        buf[5] = i
        arr.push(JSON.parse(JSON.stringify(buf)))
    }

    buf[3] = 0x36
    buf[5] = obj.state === 'off' ? 0 : 1
    arr.push(JSON.parse(JSON.stringify(buf)))

    buf[3] = 0x34
    buf[4] = obj.attributes.current_temperature || 25
    buf[5] = obj.attributes.temperature || 16
    arr.push(JSON.parse(JSON.stringify(buf)))
}

/**
 * 对象转缓冲区
 * @param {object} obj HA状态对象
 * @param {object} obj1 节点对象
 */
function obj2buf(obj, obj1) {
    if (obj1.entity_id === obj.entity_id) {
        let arr = []
        let buf = [obj1.uid, 0x20, 0x10, 0x21, 0x00, 0x00] // Alive协议不包含标识字节
        handleClimateState(buf, obj, arr)
        return arr
    }
    else
        return null
}

module.exports = {
    buf2obj,
    obj2buf
};