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Re: Adafruit USB and PPS
From: |
Gary E. Miller |
Subject: |
Re: Adafruit USB and PPS |
Date: |
Wed, 4 Dec 2019 13:17:47 -0800 |
Yo Neal!
On Wed, 4 Dec 2019 21:10:00 +0000
Neal Dillman <address@hidden> wrote:
> Then run ppscheck against your serial port:
> ppscheck /dev/ttyUSB0
> /home/pi/gpsd-3.19# ./ppscheck /dev/ttyUSB4
>
> # Seconds nanoSecs Signals
>
> PPS ioctl(TIOCMIWAIT) failed: 25 Inappropriate ioctl for device
And you are sure /dev/ttyUSB4 connects to the receiver? If so then
the driver is confrmed bad for PPS. Nothing gpsd can do about a bad
kernel driver.
> Saw that. And the error from ppscheck indicates the tty is not a
> serial tty, not RI specific.
PPS with gpsd needs a serial tty. Without the modem control signals
there is no way to read the PPS.
> And gpsd is getting a stream from the
> device just fine. There is probably an easy answer I am missing :|
The easy answer is that your GPS will not work with that driver.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
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