"Jan Panteltje"  wrote in message
news:pjeq4p$qml$1@dont-email.me...
> On a sunny day (26 Jul 2018 21:03:17 GMT) it happened ray carter
>  wrote in :
>
>>Having discovered that there are GPS 'dongles' that plug into the USB
>>port - readily available for $10-ish, I decided to pick up my old A+ and
>>do the thing. I have a 5" hdmi touchscreen on it for display, so no kbd
>>or mouse needed.You can actually just capture the GPS output from one of
>>the tty ports, but I wanted more than that so installed gpsd and
>>foxtrotgps and we're good to go. With that in place and lxde running,
>>about 2/3 of memory is used, so I'll go with twm - that more than cuts
>>memory usage in half. Plan is to move it over to a zero. I have a fairly
>>good capacity power bank to use it with.
>
> Nice.
> Only restriction on using /dev/ttyUSB* is that if you plug in / out
> serial devices the kernel can renumber things.
>
> Raspi has a real serial port on /dev/ttyAMA0 accessible via 2 GPIO pins.
> Many GPS modules come with logic level serial out.
> This stuff I wrote uses /dev/ttyAMA0
> http://panteltje.com/panteltje/xgpspc/index.html
> website needs updating...
> root@raspberrypi:~/compile/pantel/xgpspc# uptime
> 11:51:02 up 72 days,  4:19, 10 users,  load average: 1.34, 1.52, 1.52

Are the GPIO pins hot-pluggable, or will Nasty Things (*) happen if you
connect/disconnect anything to them while the Pi is running?

(*) Either at the software or the hardware level.

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