Read up to 12 digital inputs.

Adapting electronic is not need if the inputs are already TTL (0V->OFF, 5V-ON). If its not the case add additional circuits as needed.

Digital Inputs

To install on your computer see How to Install Drivers 
Arduino firmware: StandardFirmata-2.3
skeleton file: digital_inputs_sk.xml
Customize your device editing skeleton file and change "INPUT 0" for the real name of the input plugin


3rd Party

Choose from the numerous 3rd party INDI drivers to suit your needs!

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