On Thu, Dec 1, 2016 at 5:06 AM, Bouni <bo...@owee.de> wrote: > Hi, > > thanks for your answers! > > I've searched the web yesterday in the evening for quite a long time and > stumbled up on this page: > > http://inspire.logicsupply.com/2014/09/beaglebone-rs-485- > communication.html > > If I got it right, I can use the installed Kernel (Linux beaglebone > 3.8.13-bone71.1) because as of 3.8.13-bone39 RS485 support is built into > the kernel. > > I just did a quick test: > > - The beaglebone is connected via USB to my laptop, I ssh into it over > said usb. > - I have a USB-RS485 adapter connected to my laptop as well > - both devices are connected with 2 wires (A&B) > - I've set the jumper to UART4, for both RX and TX > - I also connected the RSE pin to P9_15 which is GPIO48 > - UART 4 was activated throug /boot/uEnv.txt (cape_enable=capemgr.enable_ > partno=BB-UART4) > > Using this python script https://gist.github.com/Bouni/ > 49a292798e88a7a0956c308b3c9d1190 (inspired by http://inspire.logicsupply. > com/2014/09/beaglebone-rs-485-communication.html), > I'm able to communicate over RS485. In my opinion i should be able to > complete my project with these preconditions. > > I was considering sending you that link yesterday, but figured you knew of it already.
> @William: my ventilation system is completely passiva as far as i know. It > features a Modbus RTU server from which i can request information or send > new settings over Modbus RTU. > My Homeautomation system can only handle Modbus TCP. So my plan is to let > the BB run a Modbus TCP server which translates the TCP requests to RTU and > send them to the ventilation system. > The answers just go the other way round. > Ah, ok got it. -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORra_1c7COF13fdhe6Ar7ZP2Qkvnf%3DbMEDh8JHaiimdnwg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
