An ADS-B In Question

On Saturday, January 23, 2016 at 1:26:55 PM UTC-8, Andy Blackburn wrote:
On Sunday, January 17, 2016 at 10:38:00 PM UTC-8, Darryl Ramm wrote:

A protocol converter could be built to go from GDL-90 to FLARM dataport. But it is a bit harder then it might first appear to do something properly.

Here is a Kickstarter project to build a dual-band ADS-B In box based on Raspberry Pi and the Stratux Open Source project. It should be pretty straightforward to get NMEA sentences put out to the serial port and a level shifter to get to serial port voltages.

https://www.kickstarter.com/projects...b-receiver-kit

Stratux is written in Go. Here is the ask for creating code to put NMEA sentences onto the serial port.

https://github.com/cyoung/stratux/issues/218

A harder job would be to turn the RPi into a Mux to merge Flarm NMEA with the FlightBox UAT and TIS-B traffic and deliver a merged NMEA stream. Then all I need is ADS-B Out and I've got visibility into everything. Even before then I should be able to see

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...

Any takers?

9B

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

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

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.

Darryl, thanks for being our ADS-B ambassador / guru. At this point I imagine you can cut and paste many of your responses. I'll go back and study harder :-)

On Sunday, January 24, 2016 at 2:07:56 AM UTC-6, Craig Funston wrote:
Darryl, thanks for being our ADS-B ambassador / guru. At this point I imagine you can cut and paste many of your responses. I'll go back and study harder :-)

All these friggin acronyms - you sound like Sarah Palin to me, incoherent babble, anyone speaking English around here?

Well at least the punctuation is correct on the posts, something Sarah is incapable of learning.

On Sunday, January 24, 2016 at 11:05:22 AM UTC-8, wrote:
On Sunday, January 24, 2016 at 2:07:56 AM UTC-6, Craig Funston wrote:
Darryl, thanks for being our ADS-B ambassador / guru. At this point I imagine you can cut and paste many of your responses. I'll go back and study harder :-)

All these friggin acronyms - you sound like Sarah Palin to me, incoherent babble, anyone speaking English around here?

On Sunday, January 24, 2016 at 11:05:22 AM UTC-8, wrote:
On Sunday, January 24, 2016 at 2:07:56 AM UTC-6, Craig Funston wrote:
Darryl, thanks for being our ADS-B ambassador / guru. At this point I imagine you can cut and paste many of your responses. I'll go back and study harder :-)

All these friggin acronyms - you sound like Sarah Palin to me, incoherent babble, anyone speaking English around here?

The coherent version of this as I have said many times is you should get a transponder and/or PowerFLARM depending on your needs. Everything else is futureware most glider pilots don't need to worry about now. If you can't understand the incoherent version then it's not something you should be worrying about.

Really?

Ok, I'm out. Civil conversation has ended here.


On Sunday, January 24, 2016 at 1:12:52 PM UTC-6, Jonathan St. Cloud wrote:
Well at least the punctuation is correct on the posts, something Sarah is incapable of learning.

On Sunday, January 24, 2016 at 11:05:22 AM UTC-8, wrote:
On Sunday, January 24, 2016 at 2:07:56 AM UTC-6, Craig Funston wrote:
Darryl, thanks for being our ADS-B ambassador / guru. At this point I imagine you can cut and paste many of your responses. I'll go back and study harder :-)

All these friggin acronyms - you sound like Sarah Palin to me, incoherent babble, anyone speaking English around here?

On Sunday, January 24, 2016 at 1:21:46 PM UTC-6, Darryl Ramm wrote:
On Sunday, January 24, 2016 at 11:05:22 AM UTC-8, wrote:
On Sunday, January 24, 2016 at 2:07:56 AM UTC-6, Craig Funston wrote:
Darryl, thanks for being our ADS-B ambassador / guru. At this point I imagine you can cut and paste many of your responses. I'll go back and study harder :-)

All these friggin acronyms - you sound like Sarah Palin to me, incoherent babble, anyone speaking English around here?

The coherent version of this as I have said many times is you should get a transponder and/or PowerFLARM depending on your needs. Everything else is futureware most glider pilots don't need to worry about now. If you can't understand the incoherent version then it's not something you should be worrying about.

Sorry Darryl, you are very coherent and agreeable - I was just baffled by the last couple of posts. I do have PFlarm and a transponder in my glider, wouldn't fly without them.