Smart Tractor Enabler is a device which measures tractor speed over reed relay placed on Cardan shaft and send data over Bluetooth to a mobile device. Purpose of the device is to inform tractor driver of current speed and to suggest speed while doing a specific operation on the field. Together with the mobile app which collect tractor trajectory in time it's part of IoT agriculture project.
Detail view with schematic and all layouts are prestened in Smart-Tractor-Enabler/Smart-Tractor-Enabler.PDF
This project is under CERN Open Hardware Licence v1.2.
If you recognized improvements feel free to write comments, create issues and make a pull request.