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Smart Air Conditioning Control With ThingsBoard

2024-05-08
#thingsboard  #IoT  #ruleChain  #nodered 

Automating Climate Control: Leveraging Dual Thermometers for Smart Air Conditioning via ThingsBoard

记录一次在thingsboard中通过同时满足两个温度计的温度条件来控制空调开关机
当然这并不是真实过程对接调式，只是通过模拟的方法来熟练一下thingsboard的ruleChain

第一步，创建一个空的规则链，名称就叫两个温度计控制空调的规则链

img_2.png

第二步，创建一个设备配置，名称就叫两个温度计控制空调的设备配置

img_3.png

第三步，分别添加三个设备温度计1、温度计2、空调

img_4.png

第四步，给温度计1,温度计2 设备添加关联关系

添加关系的原因是，因为温度计1,温度计2 的温度都满足了条件需要给空调发送rpc控制消息 才需创建关联空调的，这里可以理解是温度计控制空调，所以创建温度计向外的关联（from）的关系 同理也可以理解，空调需要接受温度计的控制消息向内的关联（to）的关系，这两个关系方向都可以 这里以from关系为例创建，但请注意，这里的关系类型一定要唯一，不能一样我这里建立了两条关系分别是relation1, relation2 img.png

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Record an Error During Node RED Deployment

2024-02-22
#nodered  #pm2  #docker 

记一次在docker 打包部署node red 启动报错

报错如下：

---------------------------------------------------------------------
Your flow credentials file is encrypted using a system-generated key.

If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.

You should set your own key using the 'credentialSecret' option in
your settings file. Node-RED will then re-encrypt your credentials
file using your chosen key the next time you deploy a change.
---------------------------------------------------------------------

22 Feb 20:47:25 - [warn] Encrypted credentials not found
22 Feb 20:47:25 - [info] Server now running at http://127.0.0.1:3002/
22 Feb 20:47:25 - [info] Starting flows
22 Feb 20:47:25 - [info] Started flows

22 Feb 20:47:35 - [warn] Flushing file /data/nodes to disk failed : Error: EISDIR: illegal operation on a directory, rename '/data/nodes.$$$' -> '/data/nodes'
22 Feb 20:47:35 - [warn] Error saving flows: EISDIR: illegal operation on a directory, rename '/data/nodes.$$$' -> '/data/nodes'
22 Feb 20:47:35 - [warn] Error: EISDIR: illegal operation on a directory, rename '/data/nodes.$$$' -> '/data/nodes'

PM2启动信息

使用如下PM2配置文件启动Node-RED实例：

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