#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <espnow.h>
#include <Adafruit_NeoPixel.h>
 
#define PIN 5 //=wemos D1
 
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

typedef struct message {
   int red;
   int green;
   int blue;
} message;
message myMessage;

void onDataReceiver(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
   Serial.println("Message received.");
   // We don't use mac to verify the sender
   // Let us transform the incomingData into our message structure
  memcpy(&myMessage, incomingData, sizeof(myMessage));
  Serial.print("Red:");
  Serial.println(myMessage.red); 
  Serial.print("Green:");
  Serial.println(myMessage.green);
  Serial.print("Blue:");
  Serial.println(myMessage.blue);
  setColor(0,myMessage.red,myMessage.green,myMessage.blue,100);
}
//simple function which takes values for the red, green and blue led and also
//a delay
void setColor(int led, int redValue, int greenValue, int blueValue, int delayValue)
{
  pixels.setPixelColor(led, pixels.Color(redValue, greenValue, blueValue)); 
  pixels.show();
  delay(delayValue);
}

void setup() {
  Serial.begin(115200);
  WiFi.disconnect();
  ESP.eraseConfig();
 
  // Wifi STA Mode
  WiFi.mode(WIFI_STA);
  // Get Mac Add
  Serial.print("Mac Address: ");
  Serial.print(WiFi.macAddress());
  Serial.println("\nESP-Now Receiver");
  
  // Initializing the ESP-NOW
  if (esp_now_init() != 0) {
    Serial.println("Problem during ESP-NOW init");
    return;
  }
  
  //esp_now_set_self_role(ESP_NOW_ROLE_SLAVE);
  // We can register the receiver callback function
  esp_now_register_recv_cb(onDataReceiver);
  pixels.begin(); 
}
void loop() {
  // put your main code here, to run repeatedly:
}