To control the module in Node-RED, you need an API token, which is entered in the corresponding Node-RED module.
The module can only be controlled from Node-RED if the API token exists and has been entered.
You can create API tokens for a single module or for several modules. 
If the API token is deleted, all permissions are revoked from the module that uses it. In that case, you must create a new API token and enter it in the module in Node-RED.
Creating an API token:

  • Click the plus symbol.
  • Give the token a name so that you know what you are using it for.
  • Activate the permissions the API token should have (for the 4-20mA OUT module, for example, Analogue output 4-20mA must be activated).
  • Copy the API token so that you can enter it in Node-RED.
If you want to access the SmartPi API directly, you can also use the API tokens. The advantage is that you do not have to log in with your user name and password when querying the API. You can find more information elsewhere in the user manual.