#include <ESP8266WiFi.h>
#include <espnow.h>


// Callback when data is received
void onDataReceived(uint8_t *senderMac, uint8_t *incomingData, uint8_t len) {
Serial.print("Received: ");
for (int i = 0; i < len; i++) {
Serial.print((char)incomingData[i]);
}
Serial.println();
}


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


// Set device as a Wi-Fi Station
WiFi.mode(WIFI_STA);
WiFi.disconnect();


// Print MAC address of the receiver
Serial.print("Receiver MAC: ");
for (int i = 0; i < 6; i++) {
Serial.print(WiFi.macAddress()[i], HEX);
if (i < 5) {
Serial.print(":");
}
}
Serial.println();


// Initialize ESP-NOW
if (esp_now_init() != 0) {
Serial.println("Error initializing ESP-NOW");
return;
}


// Register callback for receiving data
esp_now_set_self_role(ESP_NOW_ROLE_SLAVE);
esp_now_register_recv_cb(onDataReceived);
}


void loop() {
// Nothing to do here
}