This FeatherWing can measure numerous parameters and display them on the e-ink display or send the information back through the Feather wireless link.
This FeatherWing was designed to monitor HVAC system parameters. It can measure airflow, humidity, and temperature, and it has terminal block connections that can be used for analog inputs or as outputs. The data can be displayed on an integrated e-ink display. We have built and tested units, and they are working well. Files and code to follow.