changing GPIO ?

[samiwe]

Hello all, I have bought a display for my Raspi 3b+ which unfortunately occupies GPIO 17. ( [ ](https://www.waveshare.com/wiki/3.5inch_RPi_LCD_(A))) .
Can I (easily, as my programming skills are close to 0) change the GPIO ?

Would it be enough to change the line gpio=17=pu,ip to gpio=12=pu,ip in /boot/config.txt using the editor ?
Or do changes have to be made somewhere else ?
Or are there other GPIO's than the 12 that I should prefer ?

Thanks also for the great work on the open rowing monitor

Greets
Sam

[Gordon-Shumway2]

Hi,

the change in /boot/config.txt tells the OS to set a specific gpio into a known state. Additionally you need to tell ORM to use that gpio. This is done in confg/config.js via the parameter gpioPin. See example within

 https://github.com/laberning/openrowingmonitor/blob/main/config/default.config.js

Cheers,
Michael

[samiwe]

Hi Alf ;-)
Thanks for your answer. I have now adjusted opt\openrowingmonitor\config.js and it looks like this: (by the way:my rower has 6 magnets on the flywheel):

},

// example: set a rower profile:
rowerSettings: rowerProfiles.DKNR320

// example: set custom rower settings:
rowerSettings: {
  numOfImpulsesPerRevolution: 6,
  dragFactor: 0.03,
  flywheelInertia: 0.3,
  gpioPin: 6
}

I have also switched on the pull-up in /boot/config.txt, but no strokes are detected!
Can I use GPIO6 at all ?

greets
Sam

[JaapvanEkris]

gpio is outside the rower settings (see the default.config.js structure).

And I'm not sure you inherit the DKN settings in this setup. I think it will empty the remaining settings.

[samiwe]

Hello Jaap, sorry but as already mentioned above, my programming skills are close to zero, so I'm not really getting anywhere with your answer. I understand "outside the rower settings" to mean this position: (Is that right with the { and } ?)

export default {
  /*
    // example: change the default log level:
    loglevel: {
      default: 'debug'
    },

// example: set a rower profile:
rowerSettings: rowerProfiles.DKNR320

// example: set custom rower settings:
rowerSettings: {
  numOfImpulsesPerRevolution: 6,
  dragFactor: 0.03,
  flywheelInertia: 0.3,
}
{
    gpioPin: 6
}
    // example: set a rower profile, but overwrite some settings:
    rowerSettings: Object.assign(rowerProfiles.DKNR320, {
      autoAdjustDragFactor: true
    })
  */
}

[Abasz]

export default {
  /*
    // example: change the default log level:
    loglevel: {
      default: 'debug'
    },

// example: set a rower profile:
rowerSettings: rowerProfiles.DKNR320

// example: set custom rower settings:
rowerSettings: {
  numOfImpulsesPerRevolution: 6,
  dragFactor: 0.03,
  flywheelInertia: 0.3,
}
{
    gpioPin: 6
}
    // example: set a rower profile, but overwrite some settings:
    rowerSettings: Object.assign(rowerProfiles.DKNR320, {
      autoAdjustDragFactor: true
    })
  */
}

Your above config is incorrect basically in every aspect. Please use the below:

export default {
    loglevel: {
        default: "debug",
    },

    gpioPin: 6,

    rowerSettings: Object.assign(rowerProfiles.DKNR320, {
        autoAdjustDragFactor: true,
        numOfImpulsesPerRevolution: 6,
        dragFactor: 0.03,
        flywheelInertia: 0.3,
    }),
};

[samiwe]

i will try, thanks - but because of my various unprofessional attempts to edit the config.js ( I only have a Win10 PC, so first I had to find a tool to mount the Rapsi SD -> "Linux File Systems for Windows" by Paragon)
now nothing works at all and I have to format the SD card again and start from scratch.

[JaapvanEkris]

Look at Putty (https://www.chiark.greenend.org.uk/~sgtatham/putty/), than you log in from your desktop into the Raspberry Pi.

[Gordon-Shumway2]

At installation time you can set up ORM to publish the filesystem containing the configuration and the rowing data files via SMB:

    "Do you want to create a samba network share to simplify access to training data and configuration?"

Win10 is able to see this mount out of the box within Explorer - no need for third party tools to read filesystems.