Tune your controller without reflashing.

The problem

Tuning a controller usually means: change the value in code, compile, flash, wait, watch – twenty times. Every round costs minutes and breaks the link between a change and its effect.

What Kymotrace does

The firmware reports its tunable variables with limits and unit. KymoStudio shows them in a panel next to the source, sends new values back and evaluates the device's answer.

In the firmware

With KymoCore 7.1: list the variables, pass on the received bytes, done. The back channel has its own switch; without it, it is not in the code at all, and KymoStudio's receive path stays unchanged.

Full example: PI controller in KymoProbe →

static float kp = 0.2f, setpoint = 45.0f;

static const KymoParameter params[] = {
    KYMO_PARAM(100, kp,       0.0f, 10.0f, ""),
    KYMO_PARAM(102, setpoint, 20.0f, 90.0f, "\xC2\xB0" "C"),
};
static KymoParamReceiver receiver;

// setup()
KymoParam_Init(&receiver, params, KYMO_COUNT_OF(params));
// loop(): pass on the received bytes
KymoParam_Feed(&receiver, rx, n);