How to Control IoT ONE Nixie Clock via Arduino IoT Cloud or Alexa voice Control

This device allows me to detect if the spool ran out of filament or if the print head is clogged !!

My first project running on a lithium ion battery is here: an IOT device that not only detects if there is water but sends data to the cloud

Using the Arduino Cloud API to obtain IoT data for your MIT App Inventor apps.