Trying to understand Maxkare rowing support with 4 pins

[bridgewaterrobbie]

I have a “maxkare” rower and I’m trying to figure out if I can upgrade it with this setup. There are two wires that go from the flywheel to the default console, each with two pins themselves. That’s double what I’d expect, given the instructions listed so I’m not sure if I should expect it to work.

[JaapvanEkris]

If you know what the pins do, it might be able to fit ORM on it. I use ORM on a concept2 which has three wires and delivers 15 Volt. So some simple prefab electronics might help you there. Can you measure resistance or volts across the wires?

[tfatykhov]

Maxkare has two wheels. The small one is connected to the pulling cord, and then it has a belt mechanism that transfers that to the flywheel. A magnet is installed in the small wheel; therefore, It cannot measure drag. It is kind of bicycle mechanism They measure the frequency of your pulls, and with that, they measure distance. I do not think they can do more than that. Connector with male pins connected to the magnet. You can use that one to connect to RPI, but I am not sure it is possible to accurately use this software with such design.

[tfatykhov]

I was able to connect maxkare air rower and get decent readings using the v1beta branch. I am still working on best settings but so far here is what I have:

config,js:
webUpdateInterval: 100,
gpioTriggeredFlank: 'Up',
gpioMinimumPulseLength: 300,

numOfPhasesForAveragingScreenData: 4,

// maximumStrokeTime: 20,
peripheralUpdateInterval: 200,

rower profile:

MaxKare_Air: {
numOfImpulsesPerRevolution: 1,
sprocketRadius: 7,
minimumTimeBetweenImpulses: 0.007,
smoothing: 1,
flankLength: 1,
minumumForceBeforeStroke: 2,
minimumStrokeQuality: 0.6,
minimumDriveTime: 0.200, // minimum time of the drive phase
minimumRecoveryTime: 0.600, // minimum time of the recovery phase
dragFactor: 108,
autoAdjustDragFactor: true,
dragFactorSmoothing: 1,
minimumDragQuality: 0.97,
flywheelInertia: 0.083,
maximumStrokeTimeBeforePause: 6.0
},

[tfatykhov]

Here is the photos of the connection: