#include <Wire.h>

#define SDA_PIN D0
#define SCL_PIN D1
#define BUTTON_PIN D5

int selectedAddress = 0x01;  //S1 Default
bool lastButtonState = LOW;

void setup() {
    pinMode(BUTTON_PIN, INPUT);
    Wire.setSDA(SDA_PIN);
    Wire.setSCL(SCL_PIN);
    Wire.begin();
    Serial.begin(115200);
    Serial.println("Type '1' for secondary 1 or '2' for secondary 2.");
}

void loop() {
    if (Serial.available()) {
        char input = Serial.read();
        if (input == '1') {
            selectedAddress = 0x01;
            Serial.println("Selected Secondary 1 (0x01)");
        } else if (input == '2') {
            selectedAddress = 0x02;
            Serial.println("Selected Secondary 2 (0x02)");
        }
    }

    bool buttonState = digitalRead(BUTTON_PIN);
    if (buttonState == HIGH && lastButtonState == LOW) {
        Wire.beginTransmission(selectedAddress);
        Wire.write(1);
        Wire.endTransmission();
        Serial.print("Signal sent to address 0x");
        Serial.println(selectedAddress, HEX);
        delay(200);
    }
    lastButtonState = buttonState;
}