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  1. Replies
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    Yes, thanks Paul. This was part of the solution,...

    Yes, thanks Paul. This was part of the solution, as I mentioned in my previous reply. But it is also important to note that it will not work with the Adafruit_ST7735 library that is (optionally)...
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    Solved!

    Finally got it working with this configuration:


    LCD --> Teensy 3.2
    vcc --> vin
    gnd --> gnd
    cs --> 10
    reset -- > 7
    a0 (dc) --> 8
    sda (mosi) --> 11
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    Latest wiring: LCD --> Teensy 3.2 vcc --> vin...

    Latest wiring:

    LCD --> Teensy 3.2
    vcc --> vin
    gnd --> gnd
    cs --> 15
    reset -- > 8
    a0 (dc) --> 12
    sda (mosi) --> 11
    sck --> 13
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    Okay, some more progress. Didn't realize that the...

    Okay, some more progress. Didn't realize that the a0 (dc) pin on the LCD was the miso pin (still not sure about this). Now the a0 on the LCD and the miso pin on the RFID reader share pin 12.

    The...
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    Making some progress (I think). I tried...

    Making some progress (I think).

    I tried rewiring so that both the LCD and the RFID share the same mosi and sclk like so:

    LCD --> Teensy 3.2
    vcc --> vin
    gnd --> gnd
    cs --> 20
    reset -- > 8...
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    UPDATE: Seems I am not using the libraries...

    UPDATE:

    Seems I am not using the libraries that I thought I was. I thought I was using the libs in my documents->arduino->libraries folder but was probably using the default ones installed with...
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    Yes good point. Should have supplied that info. ...

    Yes good point. Should have supplied that info.

    I am using the one you mentioned for the rfid:
    https://github.com/miguelbalboa/rfid

    I am also using this version of the ST7735 lib as it apears...
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    Conflict with MFRC522 and ST7735 libraries

    I am trying to get an LCD screen to work with an rfid reader using the MFRC522 lib with the ST7735 lib on Teensy 3.2.

    Here are the LCD and RFID reader:...
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    Major props! Awesome community here.

    Major props! Awesome community here.
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    You little beauty! It works now. I just...

    You little beauty! It works now. I just remembered I had been messing with the I2C addresses in the motor driver library. When I put it back to 0x60 it worked.
    I'm sure I tried it before with the...
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    Ah yes that's changed things. Still no action...

    Ah yes that's changed things. Still no action from the motors but now when I run the Scanner program that I tried before I get this output (pls excuse verbose post):
    ...
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    Good stuff! Thanks for that - appreciate your...

    Good stuff! Thanks for that - appreciate your help. I'll have a looksee.
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    Is there someway I can trouble shoot with...

    Is there someway I can trouble shoot with multimeter or oscilloscope?

    If I hooked up an oscilloscope to the SDA or SCLK what should I expect to see? As I mentioned before the program won't even...
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    No problem. Any ideas are welcome. I still learnt...

    No problem. Any ideas are welcome. I still learnt something and that's always a good thing!
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    Thanks HWGuy I'll try the 3.3v pin. Not sure...

    Thanks HWGuy I'll try the 3.3v pin.

    Not sure about the I2C address. I only have a limited understanding of I2C. Seems like a good opportunity to learn more about it. I'll scrub up on it some more....
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    Haha yes they are. But you never know so fair...

    Haha yes they are. But you never know so fair question!

    Just to be sure I have checked connections with a multimeter.

    Hmm got me a bit worried now. I was hoping I had that wrong so it would be...
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    Great! Thanks Paul. Looking forward to seeing the...

    Great! Thanks Paul. Looking forward to seeing the schematic. Should shine some light on it.

    Of course stacking it on top of one of their Featherwing boards would be an easy fix, but then I...
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    Code

    Here is the code I used. I first tried the default library (Adafruit Motor Shield V2 library) and example (DCMotorTest) but after no success I changed it to this:

    6496
    6497
    6499
    6500

    6501
    ...
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    Photos

    As suggested here are the photos of the hardware setup:

    64946495

    Extra wires coming from the encoder on the motor are not used at this time.
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    I also forgot to mention (an important clue) that...

    I also forgot to mention (an important clue) that there is no serial output using the DCMotorTest code even thought there is a Serial.print in the loop. However if I use pullups on the SDA and SCL...
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    This automatically initiates the scan. Is this...

    This automatically initiates the scan. Is this the intended result?

    When I first tried it the LED went solid on and the output was:

    ---------------------------------------------------
    Starting...
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    Thanks Paul, good to know about that! Just out of...

    Thanks Paul, good to know about that! Just out of interest, where did you find the schematic? Somewhere obvious no doubt :o

    Originally I just connected the wires as suggested but then tried...
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    Apologies, I thought I had covered that by...

    Apologies, I thought I had covered that by providing a link to the library and code example. In future I will provide the information directly within the post.

    The library I used is the Adafruit...
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    Thanks Xenoamor. Good idea. I tried the...

    Thanks Xenoamor. Good idea.

    I tried the Scanner example but it doesn’t seem to find anything.

    The serial monitor outputs this for about a dozen times while turning LED on then off:
    ...
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    Teensy 3.2 with Featherwing DC motor board

    Has anyone managed to get the Featherwing DC motor board to work with the Teensy 3.2?
    https://www.adafruit.com/products/2927

    I have tried following the instructions here:...
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