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

#define DHTPIN 4
#define DHTTYPE DHT22
#define POTPIN 34

DHT dht(DHTPIN, DHTTYPE);

// Structure for sending data
typedef struct struct_message {
  float temperature;
  float humidity;
  int potValue;
} struct_message;

struct_message myData;

// Receiver MAC Address (change after running Receiver code!)
uint8_t receiverMac[] = {0x24, 0x6F, 0x28, 0xAB, 0xCD, 0xEF};  

void setup() {
  Serial.begin(115200);
  dht.begin();

  WiFi.mode(WIFI_STA);

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

  esp_now_peer_info_t peerInfo;
  memcpy(peerInfo.peer_addr, receiverMac, 6);
  peerInfo.channel = 0;  
  peerInfo.encrypt = false;
  
  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("Failed to add peer");
    return;
  }
}

void loop() {
  // Step 2: Read sensors
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  int potValue = analogRead(POTPIN);

  // Step 3: Pack into struct
  myData.temperature = t;
  myData.humidity = h;
  myData.potValue = potValue;

  // Send via ESP-NOW
  esp_err_t result = esp_now_send(receiverMac, (uint8_t *) &myData, sizeof(myData));

  if (result == ESP_OK) {
    Serial.println("Data sent successfully");
  } else {
    Serial.println("Error sending data");
  }

  delay(2000); // Send every 2s
}