Stratux Serial output for EFIS's that support GDL90 over serial.

There are a few EFIS's manufacturers who support GDL90 over RS-232 and Stratux can send data to them with some additional hardware.

For serial data to be output you will need a CP2102 based USB to serial adapter that supports RS-232 voltage levels. This adapter will need to be programmed with a product description of "Stratux Serialout" so that Stratux can tell what function it is supposed to do. To output Flarm-NMEA instead of GDL90, you can set the description to "Stratux Serialout NMEA".

Preprogrammed USB serial adapters are available from the Stratux store on amazon https://www.amazon.com/dp/B01N7RNFRJ/

This programming can be done on the pi if you are comfortable downloading and installing a utility. http://github.com/DiUS/cp210x-cfg is the required utility. Once that software is installed you plug the USB serial adapter in and run sudo ./cp210x-cfg -N "Stratux Serialout"

If you are not comfortable doing that there is a windows utility that can do the same thing. Download and install https://www.silabs.com/documents/public/software/CP210x_Windows.exe Inside of the folder that is installed is a file called CP21xxCustomizationUtility.exe run that and then you can edit the product description. Afterwards simply hit program device to save the settings.

The serial adaptor has many pins but the ones we want to use are 232T and GND. 232T is connected to the serial in port on your EFIS and GND is connected to a system ground.

The switches on the serial adaptor should be configured as such. Switch 1 to ON Switch 2 to OFF

The switch marked 232-285 should be towards the edge of the board.

Once you have Stratux up and running you should set the baud rate to match the rate set in your EFIS. Once you have basic communications up and running you should increase the speed on both the EFIS and Stratux to the highest rate available to the EFIS.