Apex FMM module sending error automatic top off not working

[Deep Elem]

My automatic top off and FMM module are sending an error and therefore my ATO is not working please help

 

[SuncrestReef]

What is the error?

Read my ATK Tutorial to ensure you have it set up correctly, understand how it's designed to work, and go through the troubleshooting steps I listed:

https://www.reef2reef.com/ams/neptu...torials-part-3-automatic-top-off-kit-atk.692/

 

[ca1ore]

First thing I always do when a module starts acting up is to replace the usb cable.