Node-red, raspberry pi and arduino communication issues

General
2
  1. What version of Node-RED and Node.js are you using? (look at the NR startup log for this info)
  2. Whch arduino are you using and does it support WiFi?
  3. what sensor are you using on the arduino to read the temperatures?
  4. have you coded the code on the arduino yourself or are you using a package like ESPEasy or Tasmoda? If using a package, which one?
  5. attach a debug node (set to display the complete msg object) to the output of serial-in node. See below for how to do this
  6. export your flow and attach it to a reply. See below for how to do this

How to get data from messages

There’s a great page in the docs that will explain how to use the debug panel to find the right path to any data item.

Pay particular attention to the part about the buttons that appear under your mouse pointer when you over hover a debug message property in the sidebar.

BX00Cy7yHi

https://nodered.org/docs/user-guide/messages

How to post code or flows

In order to make code readable and usable it is necessary to surround your code with three backticks (also known as a left quote or backquote ```)

``` 
   code goes here 
```

You can edit and correct your post by clicking the pencil :pencil2: icon.

See this post for more details - How to share code or flow json