#include <Arduino.h>

// Define PWM output pins (one side of the cable)
const int pwm_pins[8] = {5, 18, 19, 21, 22, 23, 25, 26}; 

// Define ADC input pins (other side of the cable)
const int adc_pins[8] = {34, 35, 32, 33, 36, 39, 27, 14}; 

// Define PWM channels
const int pwm_channels[8] = {0, 1, 2, 3, 4, 5, 6, 7};

// Define duty cycle percentages (10% to 80%)
const int duty_cycles[8] = {32, 64, 96, 128, 160, 192, 224, 255}; 

// Expected ADC voltage readings (approximate values based on 3.3V)
const float expected_voltages[8] = {0.33, 0.66, 0.99, 1.32, 1.65, 1.98, 2.31, 2.64}; 

void setup() {
    Serial.begin(115200);
    
    // Set up PWM output
    for (int i = 0; i < 8; i++) {
        ledcSetup(pwm_channels[i], 1000, 8); // 1 kHz, 8-bit resolution
        ledcAttachPin(pwm_pins[i], pwm_channels[i]);
        ledcWrite(pwm_channels[i], duty_cycles[i]); // Assign unique duty cycles
    }

    delay(500); // Allow signals to stabilize
}

void loop() {
    Serial.println("Checking Wires:");

    float measured_voltages[8];

    // Read ADC values
    for (int i = 0; i < 8; i++) {
        int adc_value = analogRead(adc_pins[i]); // Read ADC
        measured_voltages[i] = adc_value * (3.3 / 4095.0); // Convert to voltage
    }

    // Check wire conditions
    for (int i = 0; i < 8; i++) {
        Serial.print("Wire ");
        Serial.print(i + 1);
        Serial.print(": ");
        Serial.print(measured_voltages[i]);
        Serial.print(" V - ");

        // Check if wire is cut (0V)
        if (measured_voltages[i] < 0.1) {
            Serial.println("⚠️ CUT!");
            continue;
        }

        // Check if wire is swapped
        bool swapped = true;
        for (int j = 0; j < 8; j++) {
            if (abs(measured_voltages[i] - expected_voltages[j]) < 0.2) {
                swapped = (i != j); // If index doesn't match, it's swapped
                break;
            }
        }

        if (swapped) {
            Serial.println("⚠️ SWAPPED!");
        } else {
            Serial.println("✅ OK");
        }
    }

    Serial.println("-------------------");
    delay(1000);
}