#include <esp_now.h>
#include <WiFi.h>

// Structure to send data
typedef struct struct_message {
    int a0;
    int a1;
    int a2;
} struct_message;

// Create a struct_message instance
struct_message myData;

// Replace with your receiver's MAC Address
uint8_t receiverMAC[] = {0x64, 0xe8, 0x33, 0x86, 0x41, 0xa8}; // Change XX to match receiver MAC

// Callback function when data is sent
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
    Serial.print("Send Status: ");
    Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Success" : "Fail");
}

void setup() {
    Serial.begin(115200);
    
    // Set device as a Wi-Fi Station
    WiFi.mode(WIFI_STA);

    // Init ESP-NOW
    if (esp_now_init() != ESP_OK) {
        Serial.println("Error initializing ESP-NOW");
        return;
    }

    // Register send callback
    esp_now_register_send_cb(OnDataSent);

    // Register peer
    esp_now_peer_info_t peerInfo;
    memcpy(peerInfo.peer_addr, receiverMAC, 6);
    peerInfo.channel = 0;  
    peerInfo.encrypt = false;

    // Add peer
    if (esp_now_add_peer(&peerInfo) != ESP_OK) {
        Serial.println("Failed to add peer");
        return;
    }
}

void loop() {
    // Read analog values from A0 to A2
    myData.a0 = analogRead(A0);
    myData.a1 = analogRead(A1);
    myData.a2 = analogRead(A2);
    
    // Send data to receiver
    esp_now_send(receiverMAC, (uint8_t *) &myData, sizeof(myData));
    
    //delay(1000);  // Send every second
}