4. Connect COM.LTE to CoreS3?

Connect COM.LTE to CoreS3?

  • A

    Hi all!

    I just got my first CoreS3 yesterday. I've been using the original Core with COM.LTE modules for a product/project I've been working on. I'd really like to start using the CoreS3 instead, as it has so many more features that are perfect for my project. But it looks like the M-BUS connector has a slightly different pinout. Am I able to use the COM.LTE with the CoreS3?

    By default, the COM.LTE uses pins 5 and 13, which are listed as the GPIO and IIS_WS pins, respectively. On the CoreS3, those same pins are PA_SCL G1 and GPIO G7. Is the PA_SCL pin the SCL on the external red I2C connector? I do need that for some sensors.

    I could use the DIP switches to change from using pin 5 to using 15 or 16. 15 was formerly IIS_OUT but is now I2S_DOUT, which I'm assuming is for the speaker, which I need. 16 was formerly RXD2 but is now PC_RX G18. Not sure what that pin is for.

    Thanks! I'm so excited to get this new unit going!

    aezero

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  • Hello @aezero

    You are correct, on M5CoreS3 GPIO1 and GPIO2 are used for external I2C.

    I suggest you set COM.LTE to use pins 16 / 17 and then use GPIO18 / 17 in your code. AFAIK PC_RX and PC_TX are the second serial.

    Thanks
    Felix

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  • A

    @felmue
    Hi Felix! Good to hear from you again!

    Thanks for the clarification! The second serial connection is the blue connector, right?

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  • A

    Looking at the pinout diagrams with some refreshed eyes and I see it now... "PA" is short for "Port A" and "PC" is short for "Port C". And PA has a red background, like the red Port A connector, and PC is in the same light blue as Port C's connector.
    alt text

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  • Hello @aezero

    thank you for pointing that out as I haven't noticed that myself - even the background color matches the connectors.

    Thanks
    Felix

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  • A

    And on further examination, there's the dark grey PB_IN and PB_OUT pins, at G8 and G9. The splash screen when you power it on shows G8 and G9 are on Port B (there's a typo, saying "Port.C" but it's in the position of the black Port B connector).

    alt text

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  • A

    I just made another discovery. If you power it up with the factory demo software, go the home screen, and then tap on "CORES3" six times, it puts you into a factory test mode

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