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RP v3 and Serial Port

Started by JMHaro, May 10, 2016, 06:23:31 PM

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I'm getting to the point of wanting to learn how the serial port works on the RP v3 so I can get to the point of being able to control my projector from the serial port (turning it on/off) which I've successfully done from my main PC.

I have the RS232 adapter and I've tried hooking it up to my PC and using PuTTY I can connect to the Rasphberry but when I reboot the RP not all of the data is coming across.  Some of it is but not everything.  A lot of it is just coming across as garbage (see screen shot).  I can't type anything in or if it does, it usually just displays as garbage.  I'm using the following settings:
Baud 115200 / Data Bits 8 / Stop Bits 1 / Parity None / Flow control None

Does anyone know what might be my problem here?  I've attached also the hook up of my RP to the serial card.  I do have the serial card Tx connected to the RP Tx and same with the Rx pins.  I tried the other way and nothing comes across at all.

I appreciate any help.  Then I can move on to learning how to send signals to my projector.


I thought we turned off the getty running on ttyAMA0, but maybe I did that by hand on the Pi I just checked.  I think the other stuff has to do with the kernel.  Mat mentioned that there were some more things we needed to do to prevent an initial burst of garbage data at reboot time when using the onboard serial port for DMX or Pixelnet.

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