Configuration

Key Compile-Time Parameters

UDP Configuration

// In src/sensor_board/main.c
#define SENSOR_UDP_DEST_PORT 7
uint8_t dest_ip[4] = {192, 168, 0, 255};  // Broadcast address

Main Loop Timing

// In src/sensor_board/main.c
#define MAIN_TASK_DELAY_MS 5000             // 5 seconds between updates

Heap Management

// Critical heap threshold
#define CRITICAL_HEAP_THRESHOLD 8192        // 8 KB minimum

Task Configuration

const osThreadAttr_t mainTask_attributes = {
    .name = "mainTask",
    .stack_size = 1024 * 8,                 // 8 KB stack
    .priority = (osPriority_t)osPriorityNormal,
};

Runtime Configuration

Changing Sensor Poll Interval

// Current: 5 seconds
#define MAIN_TASK_DELAY_MS 5000

// Change to 1 second
#define MAIN_TASK_DELAY_MS 1000

// Change to 10 seconds
#define MAIN_TASK_DELAY_MS 10000

Enabling/Disabling Sensors

// Current: skip all sensor polling during development
const bool skip_sensor_polling = true;

// To ENABLE actual polling:
const bool skip_sensor_polling = false;

// To SKIP (for testing without hardware):
const bool skip_sensor_polling = true;

Adjusting Heap Threshold

// Current: 8 KB critical
if (free_heap < 8192) {
    LOGE(TAG, "CRITICAL: Low heap detected! Free: %lu bytes", free_heap);
}

Sensor Calibration Configuration

pH Sensor Calibration

// Set reference voltage (typically 3.3V or 5.0V)
ph_sensor_init(&ph_sensor, 3.3f);  // 3.3V reference

// Update calibration (after two-point calibration)
ph_sensor.calibration.offset = 0.0f;     // Adjust after pH 7.0 test
ph_sensor.calibration.slope = 3.5f;      // Adjust after second pH test

Load Cell Calibration

// After tare (no load):
load_cell_data[0].tare_offset_counts = adc_reading_no_load;

// After known weight measurement:
// scale = (force_newtons) / (adc_reading - tare_offset)
load_cell_data[0].scale_newtons_per_count = scale_factor;
load_cell_data[0].is_calibrated = true;

Network Configuration

Changing Broadcast Address

//To be implemented

Changing UDP Port

//To be implemented