@iamtheghost Are you using inbuilt serial IO pins from raspberry PI? If yes, you may need to disable console login. Have you configured this serial port for any other service?

looks like you have some issues with your gateway serial port.

@jkandasa I'm using the 0.0.3.Final-SNAPSHOT - does this mean I dont need to create a script like above but find a rule/condition about battery levels of nodes? If so, I cannot find that, but I am currently using your script example, which works, but is of course a little cumbersome compared to another option of using a node's battery level directly somewhere in the rules panel...