Hi Pieter;
Your wiring and voltages look fine. However you have to ‘enable’ the other serial ports. Try searching for “enable /dev/ttyO1” on this list or via Google. Bill "No one could make a greater mistake than he who did nothing because he could do only a little." "All that is necessary for the triumph of evil is that good men do nothing" Edmond Burke (1729 - 1797) http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On Behalf Of Jason Lange Sent: Tuesday, November 25, 2014 3:12 PM To: Beagle Board Subject: Re: [beagleboard] BBB: Serial Wiring For External Device Over UART1 It looks good to me, as long as you are drawing less then 250ma. On Tue, Nov 25, 2014 at 12:41 AM, <pietersydneythe...@gmail.com> wrote: I've been trying to attach a serial device to the beaglebone black and communicating with it over UART 1 (p9_24 and p9_26) with no success. In part because I am new to linux and have no idea how to ping/check connected devices over terminal and NO prior electronic knowledge to insure the device is properly wired up to the beaglebone black. I've attached a wiring diagram below. Can someone please confirm: 1. That I've wired it correctly by looking at the diagram 2. That the supplied voltage from the BBB is sufficient to power the attached device (3.3V TTL) Mapping explained (see device diagram): Pin 1 VCC (P) to 3.3Vdc on the BBB (p9_03) Pin 2 GND (G) to GND on the BBB (p9_01) PIN 3 TXD (O) to UART1 RX on the BBB (p9_26) PIN 4 RXD (I) to UART1 TX on the BBB (p9_24) <https://lh3.googleusercontent.com/-ydiICNM4U4I/VHQ-aW5xjzI/AAAAAAAAAnw/wJnRP_pSdso/s1600/BBBSerialDiagram.png> Regards Pieter -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4223/8629 - Release Date: 11/25/14 _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4223/8621 - Release Date: 11/24/14 -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
