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Omega 2+ does not turn on!

  • Hello guys,

    I have 3 gpio pins and 3 relay modules connected to the omega 2+.

    However when these are connected the 2+ does not boot. Is there some trick? Some GPIO pin's I should not be using?

    I am using pins 6, 8, 9 (according to new docs for Omega 2+). Still using omega 1 dock, is this a problem? I thought they were the same. Pins 8, 6, high on boot most times.

    I should also note that the exact same setup (different gpio pins) worked for a long time with an omega 1. If I use the omega 1 it boots (gpios don't work but that is to be expected) without issue.

    Help is appreciated. Thanks!

  • @Samuel-Mathieson
    I'd been having the same issue with mine. I have a Relay module and an ethernet module connected.
    I believe when it was occurring I had the 7 or 8 shorted with ground.
    Not sure if thats the same case you have. I find it has no issue booting with the pin across to 3.3V.

    I just saw this, here https://docs.onion.io/omega2-docs/expansion-dock.html :

    • By default, the Serial, SPI, and I2C pins implement these communication protocols and cannot be used as GPIOs. Similarly, the I2S and PWM pins are set to GPIO mode by default.

    and it links to: https://docs.onion.io/omega2-docs/using-gpios.html#using-gpios-multiplexing.

    I think it's that the default states of the pins 7/8/9 are not what we're trying to use them for.

  • Ok, thanks! Seems as if you are correct! I am now using the following 3 gpio's: 2, 3, 18. Seems to be the combination that works for me. Would be nice if we could get some sort of definitive doc that might let us know whats up. Would also be nice if the docs were consistent.

    This (https://docs.onion.io/omega2-docs/expansion-dock.html) shows one thing, but the GPIO app on the onion console does not even have 11 there at all! Why?

    Thanks for the info!

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