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common method patterns

1. device control methods​

start/stop operations​

// Start a motor
msg.payload = {
    "speed": 1500,        // RPM
    "direction": "forward",
    "rampTime": 10.0      // seconds
};
msg.objectId = "ns=2;s=Motor1";
msg.methodId = "ns=2;s=Start";
// Stop a motor
msg.payload = {
    "emergencyStop": false,
    "rampTime": 5.0       // seconds to decelerate
};
msg.objectId = "ns=2;s=Motor1";
msg.methodId = "ns=2;s=Stop";

configuration methods​

// Configure PID controller
msg.payload = {
    "kp": 1.2,           // Proportional gain
    "ki": 0.1,           // Integral gain
    "kd": 0.05,          // Derivative gain
    "setpoint": 50.0,    // Target value
    "outputMin": 0.0,    // Minimum output
    "outputMax": 100.0   // Maximum output
};
msg.objectId = "ns=2;s=PIDController";
msg.methodId = "ns=2;s=Configure";

2. process methods​

recipe execution​

// Execute a production recipe
msg.payload = {
    "recipeId": "RECIPE_001",
    "batchSize": 1000,    // kg
    "priority": "Normal",
    "operatorId": "OP123"
};
msg.objectId = "ns=2;s=BatchReactor";
msg.methodId = "ns=2;s=ExecuteRecipe";

calibration methods​

// Calibrate a sensor
msg.payload = {
    "referenceValue": 100.0,
    "currentReading": 98.5,
    "calibrationType": "TwoPoint"
};
msg.objectId = "ns=2;s=TemperatureSensor";
msg.methodId = "ns=2;s=Calibrate";

3. maintenance methods​

diagnostic methods​

// Run system diagnostics
msg.payload = {
    "testLevel": "Full",
    "includeHistory": true,
    "generateReport": true
};
msg.objectId = "ns=2;s=SystemDiagnostics";
msg.methodId = "ns=2;s=RunDiagnostics";

reset methods​

// Reset alarm conditions
msg.payload = {
    "alarmIds": ["ALM001", "ALM002", "ALM003"],
    "operatorId": "MAINT001",
    "reason": "Maintenance completed"
};
msg.objectId = "ns=2;s=AlarmManager";
msg.methodId = "ns=2;s=ResetAlarms";

next Steps​

After mastering basic method calls, explore: