On Saturday, January 23, 2016 at 3:23:18 PM UTC-8, Craig Funston wrote:
On Saturday, January 23, 2016 at 2:43:32 PM UTC-8, Andy Blackburn wrote:
On Saturday, January 23, 2016 at 1:54:56 PM UTC-8, Darryl Ramm wrote:

The Raspberry Pi without some work is not ideal here if you want hard-wired serial out. They only have a single UART. TTL level so yes you level shift that for starters. So you can take NMEA position and traffic data in on that port from a PowerFLARM, but you don't have another serial port to send this out. That would be OK if you were going Bluetooth or WiFi from the Raspberry Pi to the destination device. It is not uncommon to 'bitbang' general IO pins or use a USB to serial adapter to get serial ports on the raspberry Pi but for anything intended to be reliable I would want a real hardwired UART an decent driver. So maybe add some UART systems engineering to the skills needed...

I forgot there's only one UART on the RPi. Alternatively, you can get a K6Mux and smash the NMEA streams together after the fact. My K6Mux has been super-reliable.

Still a cool project.

9B

I saw that too and noted the WAAS GPS module. Pretty cool.

7Q

Just to be clear, lots of consumer GPS chipsets support WAAS. And that is all they are doing here, not to be confused with say a TSO-C145c "WAAS GPS" (like an ADS-B Out compliant systems might use) another whole thing, much more complex. My ancient PDA CF card GPS has WAAS. The Status ADS-B receivers and Garmin GDL 39 ADS-B receivers all have WAAS GPS. FLARM devices use WAAS.