RasPiComm Forum is online

Our new website is online!

Have a look at www.amescon.com/forum.aspx and start discussing or asking questions about the RasPiComm extension board.

You can even win a RasPiComm if you vote on the forum:

1st place: A Raspberry Pi + RasPiComm + OLED Display
2nd place: A Raspberry Pi + RasPiComm
3rd-5th place: A RasPiComm

The winners of the contest will be announced on 01/27/2013.

6 responses to “RasPiComm Forum is online

  1. MJ January 18, 2013 at 6:56 pm

    The winners of the contest will be announced on 01/27/201_3_, I assume😉

  2. Gerrie July 15, 2013 at 3:56 am

    Daniel,

    I purchased a raspicom. I am now trying to get RS485 to work using the modbus protocol.
    Do you have preferred modbus library that have working with the Raspicomm?

    Thanks for a great board.

    Gerrie

    P.S. Is it possible to order through you if I need large quantities?
    Gerrie

    • Daniel Amesberger July 15, 2013 at 8:37 am

      Hi Gerrie,
      you can use the serial kernel driver we provide (take a look at our getting started section). You should then be able to use any library which can send out and receive data over a serial port (in this case /dev/ttyRPC0).

      You can contact us directly (office@amescon.com) if you need larger quantities.

      Daniel

      • Gerrie July 15, 2013 at 3:23 pm

        Daniel,

        Thanks for you quick reply. Just to help me understand this. Does your kernel driver then take care of the RTS signal when using the RS485?

        I should then use /dev/ttyRPC0 as a vanilla serial without any concern of sending the RTS pull-up signal during modbus writes.

        If it helps, I have been using the libmodbus library but on the pi there is a problem. I cannot use the RS485 mode since the ioctl on pi (raspbian wheezy) does not recognise the TIOCSRS485 command. (Strange, but I have no idea why.)

        It sounds to me that I should use the RS232 mode because your driver takes care of the any RTS signal that you need to send the RS485 Driver chip. Correct?

        Gerrie

        • Daniel Amesberger July 15, 2013 at 3:39 pm

          Yes, you are correct. Our driver takes care of the direction signal, You should be able to just use the RS232 mode. When you are writing to /dev/ttyRPC0 the direction is automatically switched to “send” and returns to “receive” after finishing the send operation. No additional commands needed.

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