There is one at github.com/wotalota/indi-rolloffino.git.

It is a INDI rolloff roof driver and includes two examples of Arduino programs communicating over USB. The driver is packaged as a third party driver but haa not been included with the standard distribution. The Arduino code needs to be modified to match the motor control selected, the INDI driver should work once installed.

See readme.txt for a brief overview of the communication protocol and INSTALL for build directions. After the build there will be rolloffino as an option under Dome when you edit the EKos profile. The driver works with the Observatory module and weather drivers as you would expect. I am presently using it with the Vantage, WeatherMeta and WeatherProxy for a RG11 rain detector.

For my install I used a Arduino Due with an Aleko gate motor. The 3.3V Due along with pull ups made the wiring more complicated than need be for the relay but I liked the extra USB port while debugging. The attached image shows an attempt at a matching diagram for the Arduino code. The relay & external power supply shown is and approximation just the only image of one I found.

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