Just completed a project and thought I'd post here "how I did it". I got NTP (v4) working with a GPS receiver (NMEA data) and PPS (pulse per second). I could not get much of this working reliably with the OS that came with NanoPi. After 4 or 5 distro experiments, I found the "perfect ...

I have had no problem getting rpi to work on my Nano PI Neo via a GPIO. I selected GPIO 2, which is available. Is 92 available? Also, with RPI, you don't need to "export" the GPIO, just tell rpi which GPIO to use and it does the work for you: From my /etc/rc.local: /usr/local/bin/rpi_gpio_...

I have a NanoPI running : root@me:~# uname -a Linux me 4.14.0 #1 SMP Mon Dec 18 11:43:22 CST 2017 armv7l armv7l armv7l GNU/Linux I have NTP and ntp-tools installed and running, no problems. I'd like to take my external PPS source and get it working on this board as well. I have the PPS signal connec...

Thanks for the heads up! I didn't realize I need a voltage leveler. Is there any place I can readily pick up one?

Okay, from what I can tell the Nano is bit flipping every bit. All 1's are turned to 0 and vise versa. Is there some kind of Linux setting to do this? (I've never heard of it)

UPDATE:

I ran minicom on the port instead of doing a "cat /dev/ttyS2". Minicom is spewing out garbage as well. I played with all the parity and stop bit settings.. no luck. I even checked my cable for continuity and connections... all is fine.

Anyone have any clues?

I have NaoPI Neo, just opened it out of the box yesterday and was testing the uarts. I'm hooked to pins 6 (gnd), 8 (tx) and 10 (rx), running to my PC's pin's 2/3/5 (9-pin serial port). My serial port is setup as: # root@NovusOne:~# stty -F /dev/ttyS1 speed 9600 baud; line = 0; I'm running Putty on m...

How do I open/read/write any of the 4 (0-3) serial ports on the Nano PI?