That did not help unfortunately, thanks anyway. On Friday, June 10, 2016 at 10:46:44 AM UTC-4, RobertCNelson wrote: > > Hi James, > > On Fri, Jun 10, 2016 at 9:42 AM, <[email protected] <javascript:>> > wrote: > > I am trying to get an arduino to communicate with the BeagleBone Black > and > > send some measured sensor data over via the serial port. I am using the > most > > recent version of node red to do this. I am running the latest version > of > > Debian. > > > > I have confirmed using an oscilloscope that the arduino's serial port is > > outputting the information when it is supposed to (it's triggered by an > > interrupt sent by the BBB). I can see the serial ports that are > supposedly > > enabled in /dev and they appear as ttyO1, ttyO2, and ttyO4, and I have > > confirmed the port mapping and ruled out wiring issues as well (I'm > using a > > logic level converter to go from the arduino's 5V to the BBB's 3.3V > level). > > > > The ports also appear to map like so: > > > > lrwxrwxrwx 1 root root 5 Jun 9 22:37 ttyO1 -> ttyS1 > > lrwxrwxrwx 1 root root 5 Jun 9 22:37 ttyO2 -> ttyS2 > > lrwxrwxrwx 1 root root 5 Jun 9 22:37 ttyO4 -> ttyS4 > > > > Node red also sees these ports and indicated that they are 'connected' > which > > I assume means opened. > > > > When I attempt to receive data on the BBB from ANY of these ports I am > > unable to see anything on the output in node red or from the command > prompt. > > > > I am using a baud rate of 300 to rule out timing issues. I have also > > confirmed that the arduino's serial settings should be matched to what > the > > BBB is expecting. Lastly, I have even tried sending simple strings from > one > > serial port to the other on the BBB itself. > > > > Has anyone here had this sort of issue and if so, how did you come to a > > solution? > > By default, cape-universal is loaded, for BB-UART1 just do: > > config-pin P9.24 uart > config-pin P9.26 uart > > and then /dev/ttyO1 will now work.. > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ >
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