Can't get GPS/PPS to work

Gary E. Miller gem at
Sat May 21 03:12:08 UTC 2022

Yo Philipp!

On Fri, 20 May 2022 10:55:20 +0000
Philipp Ammann via users <users at> wrote:

> Am 19.05.22 um 03:34 schrieb Hal Murray:

> > Does the uBlox Neo-7M default to 9600 baud and NMEA?  
> The Neo-7M supports only 9600 Baud.

Uh, no.  That is the default, not the only option.  Even the u-blox 5

4800, 9600, 19,200, 38400, 57,600 and 115,200.

Use the UBX-CFG-PRT command to change the speed.

> > Is ttyAMA0 tangled up with Bluetooth on the Pi 4?  (I forget how to
> > kill Bluetooth.)  
> Bluetooth is disabled using "dtoverlay=disable-bt" in config.txt. AMA
> seems to be an ARM-specific name for a serial port.

Also heck the optiopns pased to the kernel at boot time.  They will be
at the top of the dmesg ouput after a boot.

On some distros you also need to edit the /etc/inittab file which
tries to attach getty to thaty port.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin
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