红色节点功能等待2个输入

Question

我正在尝试为气象站创建一个流程，在该流程中，它会等待MQTT的大量输入，然后再构建SQL语句并将数据插入数据库中。

我似乎无法让它等待所有输入都被触发之前。

我试图创建一个简单的流程，该流程使用2个具有不同主题的注入节点和一个调试节点来报告输出。

但是，一旦收到其中一条消息，功能节点就会输出...

这是功能节点中的代码：

context.data = context.data || {};

switch (msg.topic) {
case "WeatherStation1/BME280/Trev1":
    context.data.insidetemperature = msg.payload;
    msg = null;
    break;
case "WeatherStation1/BME280/Trev2":
    context.data.insidehumidity = msg.payload;
    msg = null;
    break;
default:
    msg = null;
    break;
}

if(context.data.insidetemperature !== null && context.data.insidehumidity !== null) {
msg2 = new Object();
msg2 = context.data;
context.data = null;
return msg2;
}

这是节点的代码：

  

[{“ id”：“ e61a1536.2ea238”，“ type”：“ inject”，“ z”：“ fa655376.2f5ea”，“ name”：“”，“ topic”：“ WeatherStation1 / BME280 / Trev1 “，” payload“：” 99“，” payloadType“：” num“，” repeat“：”“，” crontab“：”“，” once“：false，” onceDelay“：0.1，” x“：180， “ y”：540，“ wires”：[[“” e57cbc71.f5cce“]]}，{” id“：” e57cbc71.f5cce“，” type“：” function“，” z“：” fa655376.2f5ea“， “名称”：“等待Trev Sensors”，“ func”：“ context.data = context.data || {}; \ n \ nswitch（msg.topic）{\ n案例\” WeatherStation1 / BME280 / Trev1 \“ ：\ n context.data.insidetemperature = msg.payload; \ n msg = null; \ n休息; \ n case \“ WeatherStation1 / BME280 / Trev2 \”：\ n context.data.insidehumidity = msg.payload; \ n msg = null; \ n break; \ n默认值：\ n msg = null; \ n \ tbreak; \ n} \ n \ nif（context.data.insidetemperature！== null && context.data.insidehumidity！== null ）{\ n \ tmsg2 = new Object（）; \ n msg2 = context.data; \ n context.data = null; \ n \ treturn msg2; \ n}“，”输出“：1，” noerr“：0 ，“ x”：480，“ y”：580，“ wires”：[[“” 1f0b9ac2.57f2a5“]]}，{” id“：” fc5b276d。 4f9b18“，”类型“：”注入“，” z“：” fa655376.2f5ea“，”名称“：”“，”主题“：” WeatherStation1 / BME280 / Trev2“，”有效载荷“：” 99“，”有效载荷类型“：” num“，” repeat“：”“，” crontab“：”“，” once“：false，” onceDelay“：0.1，” x“：180，” y“：620，” wires“：[[ “ e57cbc71.f5cce”]]}，{“ id”：“ 1f0b9ac2.57f2a5”，“ type”：“ debug”，“ z”：“ fa655376.2f5ea”，“ name”：“ Trev Data”，“ active” ：true，“ tosidebar”：true，“控制台”：false，“ tostatus”：false，“ complete”：“ true”，“ x”：720，“ y”：580，“电线”：[]}] < / p>

我看不到我在做什么错。道歉，如果很明显：）

Answer 1

在这种情况下，使用如下配置的联接节点是一种更简单的方法：

测试所附的流程以查看其工作原理：

[{"id":"bd70b6f3.d327c8","type":"tab","label":"Join Node","disabled":false,"info":""},{"id":"caa58f4e.316c8","type":"join","z":"bd70b6f3.d327c8","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"2","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":470,"y":200,"wires":[["b82136ef.53d8e8"]]},{"id":"85340c81.7988b","type":"inject","z":"bd70b6f3.d327c8","name":"","topic":"WeatherStation1/BME280/Trev1","payload":"99","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":220,"y":120,"wires":[["caa58f4e.316c8"]]},{"id":"fccfc295.2527a","type":"inject","z":"bd70b6f3.d327c8","name":"","topic":"WeatherStation1/BME280/Trev2","payload":"99","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":220,"y":240,"wires":[["caa58f4e.316c8"]]},{"id":"b82136ef.53d8e8","type":"debug","z":"bd70b6f3.d327c8","name":"Trev Data","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":620,"y":200,"wires":[]},{"id":"92af39.d98c10c8","type":"inject","z":"bd70b6f3.d327c8","name":"","topic":"WeatherStation1/BME280/Trev1","payload":"22","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":220,"y":160,"wires":[["caa58f4e.316c8"]]},{"id":"21b2e29d.fac10e","type":"inject","z":"bd70b6f3.d327c8","name":"","topic":"WeatherStation1/BME280/Trev2","payload":"22","payloadType":"num","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":220,"y":280,"wires":[["caa58f4e.316c8"]]}]

Answer 2

检查您的if子句-

if(context.data.insidetemperature !== null && context.data.insidehumidity !== null) {
  ...

如果要进入该逻辑，则将两者都置位，并且您很可能缺少重置它们的逻辑。虽然看到context.data有点惊讶，因为我通常希望看到类似的东西

context.get(..)或context.global.get(...)或global.get(..)或flow.get(..)