node-red python
时间: 2023-08-12 11:08:24 浏览: 93
回答: 在Node-RED中使用Python有几种方式。一种是使用node-red-contrib-python-function节点[1],另一种是使用node-red-contrib-python3-function节点[1]。然而,在Ubuntu20中,默认只有Python3,而Python是不能直接运行的。解决这个问题的方法是创建一个软链接,将/usr/bin/python3链接到/usr/bin/python[2]。如果出现错误,可能是由于python_function引起的,可以通过创建软链接或删除python_function来解决[3]。
相关问题
node-red python
Node-RED is a flow-based programming tool that allows you to visually create applications by connecting pre-built nodes together. It is often used for IoT projects and automation tasks. While Node-RED itself is written in Node.js, it provides support for executing Python scripts through the use of the "exec" node.
To use Python in Node-RED, you can follow these steps:
1. Install Node.js: Node-RED requires Node.js to be installed on your machine. You can download it from the official website and follow the installation instructions.
2. Install Node-RED: Once Node.js is installed, you can install Node-RED globally by running the following command in your terminal:
```
npm install -g node-red
```
3. Start Node-RED: After installation, you can start Node-RED by running the following command:
```
node-red
```
4. Install Python dependencies: To execute Python scripts in Node-RED, you need to install the required Python dependencies. You can do this by running the following command in your terminal:
```
pip install pyserial
```
5. Use the "exec" node: In Node-RED's visual editor, you can drag and drop an "exec" node from the palette onto your flow. Configure the node to run a Python script by specifying the path to the script file.
6. Write Python scripts: Create a Python script that performs the desired functionality. You can use the `sys.stdin` and `sys.stdout` streams to receive input from and send output to Node-RED.
Remember to configure any required input/output parameters and handle errors appropriately in your Python script.
That's a brief overview of using Python in Node-RED. Let me know if you have any more specific questions or need further assistance!
nodered-node-wol
根据提供的引用内容,我找到了两个与nodered-node-wol相关的资源。下面是它们的介绍和演示:
1. nodered-node-wol仓库:您可以在以下链接中找到nodered-node-wol的仓库:https://github.com/thomasmauerer/hassio-addons。该仓库提供了一个Node-RED节点,用于发送Wake-on-LAN(WOL)魔术包,以唤醒远程设备。您可以通过克隆或下载该仓库来获取该节点,并将其安装到您的Node-RED实例中。
2. Xiaomi-cloud-tokens-extractor:您可以在以下链接中找到Xiaomi-cloud-tokens-extractor的代码:https://github.com/PiotrMachowski/Xiaomi-cloud-tokens-extractor/blob/master/token_extractor.py。这是一个Python脚本,用于从小米云中提取设备的访问令牌。尽管这个资源与nodered-node-wol没有直接关联,但您可能会在使用nodered-node-wol时需要使用小米设备的访问令牌。您可以按照该代码的说明来提取令牌,并在Node-RED中使用它们。
希望这些资源对您有所帮助!