Do you mean you NMEA output with corrections for roll mixed in? Or do you just want the F9P’s NMEA stream to also go to RS232 to use with another monitor?
If it’s the latter, that’s not too hard. You get a MAX3232 breakout board, and tee the TX wire to the F9P’s TX for uart1. The MAX3232 has very high impedance on the TX line, as does the Teensy, so it’s okay in this instance to share the line between the two devices (the RX on the Teensy). It won’t pull the voltage down enough to cause issues for either device.
It will work as shown for both only if they have the same baud rate board and other device.
You would have to use separate uarts for independent baud rates. If you are using dual the second f9p uart may be taken.
The little converters are great, but the tx and rx silkscreen for the pins are not written in stone. So you may have to try both pins separately on the converter to discover the correct one.
Yes, I use uart2 but at 19200 baudrate and 10Hz there is a problem with amatron, it can’t keep up with processing nmea messages. For amatron it should be 5Hz GPGGA, GPVTG, 1Hz GPGSA, GPZDA.
Tried to change f9p configurations “rates” to 200ms so then its 5hz? Its on other configcs 100ms
Then tried to change from messages uart2 gga vtg gsa options. What does that number mean its default 1.
If your configuration rates is set to 200 ms, then a setting of “1” means every 200ms. If it was 2 that would be every 2*200ms, or 2.5 hz. Hope that makes sense.
The cause of your issues very much could be the fact that the F9P transmits GNGGA instead of GPGGA. Unfortunately I’m not sure how to tell the F9P to make it GPGGA. Perhaps the F9P will only emit GPGGA when it’s only using GPS and ignoring all the other satellites.
I suppose one solution is an arduino sketch that reads in the GGA sentence on one serial, converts the talker code to GPGGA and retransmits it out another serial to your RS232.
I know you can configure the f9p to send GP instead of GN because I had to do it for 20/20 seedsense, but I don’t remember exactly where. It shouldn’t be too hard to find.
Edit: Here is a link to an article that describes how to set your talker ID
Hi. I am wondering if I can make this work with micro aio board. Last year I fed nmea to my air seeder monitor with bynav but was hoping I can make it work with new board. Any help would be appreciated. I tried connecting to tx2 pin on micro f9p and power and ground from another spot on board. changed settings in ucenter so uart2 would ouput nmea gga at 38400. cant get it to work
