Another alternative--if you need Arduino for connecting GPIO (including software PWM for analog out) and potentially analog inputs, you may be better off getting Modern Device LOP shield for RPi (I worked with it on RPi 1 rev. B model, and according to online RPi2 specs it should be also compatible with RPi2 GPIO) which gives you 10 digital I/O that can be also used as PWM analog outs, and 8 analog ins, with each connector offering ground and 3.3V pin right next to it, plus a 5V lead if you need one straight off the GPIO pin and 4 optional microswitches linked with 4 GPIOs.
https://moderndevice.com/product/lots-of-pots-lop-board-for-raspberry-pi/ (the $23 NOP version comes without the pots, assuming you don't need the pots to begin with)
Best,
Ico
On 9/21/2015 6:45 PM, Martin Peach wrote:
...and connect Tx to Rx and Rx to Tx and don't forget to connect the grounds together.
Martin
On Mon, Sep 21, 2015 at 6:16 PM, Ivica Ico Bukvic <ico@vt.edu mailto:ico@vt.edu> wrote:
Two more considerations: making sure you have the right firmware on the Arduino (sometimes it gets corrupt for seemingly no apparent reason and you need to reupload it), and finally making sure that it's getting enough power through RPi's USB port to provide stable operation. On 9/21/2015 6:15 PM, Ivica Ico Bukvic wrote: If connecting to serial port works when you run pd with sudo privileges, you will need to add your user is to the dialout group. See http://unix.stackexchange.com/questions/14354/read-write-to-a-serial-port-without-root for more info. HTH On 9/21/2015 1:56 PM, Pagano, Patrick wrote: I have done all of that for use with the ardunio uno, it's when the raspi2 is directly connected to the serial pins that it does not connect. I tested the device on mac and used the ALLINPUTS firmata and it works with a virtual serial created by FTDI just can't seem to talk to it with Linux debian running vanilla comport works fine with the UNO Patrick Pagano B.S, M.F.A Audio and Projection Design Faculty Digital Worlds Institute University of Florida, USA (352)294-2020 <tel:%28352%29294-2020> ________________________________________ From: Pd-list <pd-list-bounces@mail.iem.at <mailto:pd-list-bounces@mail.iem.at>> on behalf of IOhannes m zmölnig <zmoelnig@iem.at <mailto:zmoelnig@iem.at>> Sent: Monday, September 21, 2015 1:47 PM To: pd-list@mail.iem.at <mailto:pd-list@mail.iem.at> Subject: Re: [PD] Pduino and arudino mini pro/raspi debian- Pduino or Comport? On 09/21/2015 05:17 PM, Pagano, Patrick wrote: ?i sent that message to it ]devicename /dev/ttyS1/S0 and it does not exist so i tried to create it with mknod and it created the names in /dev but they are not accessible. mknod? this sounds like you are following advice from the 1990s. these days mknod is hardly ever needed: instead any devicefiles will be created on the fly by the resp. drivers. selecting device in the toggles in the pduino stuff only finds device 0 I am wondering if it's a linux issue because the only serial port at all is serial 0 /dev/ttyAMA0 a little bit of googling hints that /dev/ttyAMA0 is indeed the name for the serial interface on the GPIO ports - which afaiu is what you want. so you just use that device. then you need to get the permissions correct. check whether the device is already setup to allow group-members to write to it, and which group that is: $ ls -l /dev/ttyAMA0 crw-rw---- 1 root dialout 4, 67 Sep 3 16:12 /dev/ttyAMA0 and eventually add the user running Pd to that group: pd@raspbian $ sudo bash root@raspbian # adduser pd dialout after that you only need to re-login as that user to let the new group membership have any effect. gadsr IOhannes _______________________________________________ Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list -- Ivica Ico Bukvic, D.M.A. Associate Professor Computer Music ICAT Senior Fellow Director -- DISIS, L2Ork Virginia Tech School of Performing Arts – 0141 Blacksburg, VA 24061 (540) 231-6139 <tel:%28540%29%20231-6139> ico@vt.edu <mailto:ico@vt.edu> www.performingarts.vt.edu <http://www.performingarts.vt.edu> disis.icat.vt.edu <http://disis.icat.vt.edu> l2ork.icat.vt.edu <http://l2ork.icat.vt.edu> ico.bukvic.net <http://ico.bukvic.net> _______________________________________________ Pd-list@lists.iem.at <mailto:Pd-list@lists.iem.at> mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list